In accordance with section 14(p) of the Energy Conservation Act 2001 the purpose of the Energy Conservation Building Code (Code) is to provide minimum requirements for the energy-efficient design and construction of buildings. The Code also provides two additional sets of incremental requirements for buildings to achieve enhanced levels of energy efficiency that go beyond the minimum requirements.
The code is applicable to buildings or building complexes that have a connected load of 100 kW or greater or a contract demand of 120 kVA or greater and are intended to be used for commercial purposes.
Buildings intended for private residential purposes only are not covered by the Code.
The code prescribes the following three levels of energy efficiency:
ECBC Buildings shall demonstrate compliance by adopting the mandatory and prescriptive requirements listed under ECBC Compliant Building requirements in §4 to §7, or by following the provisions of the Whole Building Performance (WBP) Method in §9.
ECBC+ Buildings shall demonstrate compliance by adopting the mandatory and prescriptive requirements listed under ECBC+ Compliant Building requirements in §4 to §7, or by following the provisions of the Whole Building Performance (WBP) Method in §9.
SuperECBC Buildings shall demonstrate compliance by adopting the mandatory and prescriptive requirements listed under SuperECBC Compliant Building requirements in §4 to §7, or by following the provisions of the Whole Building Performance (WBP) Method in §9.
The provisions of this code apply to:
The provisions of this code do not apply to plug loads, and equipment and parts of buildings that use energy for manufacturing processes, unless otherwise specified in the Code.
The following codes, programs, and policies will take precedence over the Code in case of conflict:
The National Building Code of India 2016 (NBC) is the reference standard for lighting levels, heating, ventilating, and air conditioning (HVAC), thermal comfort conditions, natural ventilation, and any other building materials and system design criteria addressed in this Code.
Standards and labelling (S&L) Program of BEE will be applicable for minimum equipment efficiency standards, wherever specified. In case the schedule of S&L is revised for any equipment, the design approval year of building will be considered as base year for ECBC compliance.
Any one or more building or part of a building with commercial use is classified as per the functional requirements of its design, construction, and use. The key classification is as below:
Any building which does not fall under any of the categories defined above shall be classified in a category mentioned above that best describes the function of the building.
To comply with the Code, buildings shall
The Energy Performance Index (EPI) of a building is its annual energy consumption in kilowatt-hours per square meter of the building. While calculating the EPI of a building, the area of unconditioned basements shall not be included. EPI can be determined by:
EPI = (annual energy consumption in kWh)/(total built-up area (excluding unconditioned basements))
To comply with the Code, EPI value shall be rounded off to two decimal places in accordance with IS 2: 1960 'Rules for rounding off numerical values'.
The EPI Ratio of a building is the ratio of the EPI of the Proposed Building to the EPI of the Standard Building:
EPI Ratio = (EPI of Proposed Building)/(EPI of Standard Building)
where,
Proposed Building is consistent with the actual design of the building, and complies with all the mandatory requirements of ECBC.
Standard Building is a standardized building that has the same building floor area, gross wall area and gross roof area as the Proposed Building, complies with the mandatory requirements §4.2, §5.2, §6.2, and §7.2, and minimally complies with prescriptive requirements of §4.3, §5.3, and §6.3 for ECBC Buildings.
The EPI of the Proposed Building shall be established through any one of the following two methods described in §3.2–
EPI for core and shell buildings shall be calculated for the entire building based on the final design of the common areas and the relevant mandatory undertaking(s) in the tenant lease agreement for the leased areas, as per §3.2.2.1 or §3.2.3.1.
In a mixed-use building, each commercial part of a building must be classified separately, and EPI Ratio shall be calculated separately for each sub-classification, as per §3.2.2.1 or §3.2.3.1. The EPI Ratio of a mixed-use Proposed Building shall be calculated based on area-weighted average method. To calculate the reference maximum design EPI Ratio, listed in Table 9-5 through Table 9-9, applicable for the mixed-use building, each commercial part of mixed-use building shall be classified separately, and,
Exceptions to the above: Any portion of a mixed-use building classified in a category which does not fall under the scope of ECBC is exempted from demonstrating compliance.
Buildings that fall within the scope of the Code as mentioned in §2, shall comply with the Code by meeting all the mandatory requirements (see §3.2.1) and any of the compliance paths mentioned in §3.2.2 or §3.2.3.
Buildings shall comply with all mandatory requirements mentioned under §4.2, §5.2, §6.2, and §7.2, irrespective of the compliance path.
A building complies with the Code using the Prescriptive Method if it meets the prescribed minimum (or maximum) values for envelope components ( §4.3), comfort systems and controls (§5.3, §5.3.12, §5.3.13), and lighting and controls (§6.3), in addition to meeting all the mandatory requirements.
ECBC Buildings that demonstrate compliance through the Prescriptive Method (§3.2.2) shall be deemed to have an EPI equal to the Standard Building EPI, and therefore an EPI Ratio of 1. ECBC+ Buildings and SuperECBC Buildings that demonstrate compliance through the Prescriptive Method shall be deemed to have an EPI Ratio equal to the EPI Ratios listed in §9.5 under the applicable building type and climate zone.
To comply with the Prescriptive Method of Section §4, the Building Envelope Trade-off Method may be used in place of the prescriptive criteria of §4.3.1, §4.3.2 and §4.3.3. A building complies with the Code using the Building Envelope Trade-off Method if the Envelope Performance Factor (EPF) of the Proposed Building is less than or equal to the EPF of the Standard Building, calculated as per §4.3.5.
For projects using central chilled water plants, the Total System Efficiency approach may be used to comply with the Prescriptive Method of §5. This approach may be used in place of the prescriptive criteria of chillers (§5.3.1 and §5.3.6), chilled water pumps (§5.3.2), condenser water pumps (§5.3.2), and cooling tower fan (§5.3.3). Per this approach, a building complies if the Total System Efficiency thresholds are met as per Table 5-23 Maximum System Efficiency Threshold for ECBC, ECBC+, and SuperECBC Buildings. Compliance with other prescriptive requirements (§5.3), as applicable, shall be met with
Low Energy Comfort Systems (§5.3.13) is a simplified approach that provides projects using Low Energy Comfort Systems an opportunity to achieve improved compliance levels of ECBC+ and SuperECBC. This approach is applicable to Prescriptive Method of Section §5. In addition to compliance with the applicable prescriptive requirements (§5.3), the projects must meet the sum of cooling and heating requirement using approved list of low energy systems as per requirements in §5.3.13.
A building complies with the Code using the Whole Building Performance (WBP) Method when the estimated annual energy use of the Proposed Design is less than that of the Standard Design, even though it may not comply with the specific provisions of the prescriptive requirements in §4 trough §7. The mandatory requirements of §4 through §7 (§4.2, §5.2, §6.2, and §7.2) shall be met when using the WBP Method.
The EPI of buildings that demonstrate compliance through Whole Building Performance Method (§3.2.3) shall be calculated using the compliance path defined in §3.1.1 and detailed in §9. The EPI Ratio of a building that uses the Whole Building Performance Method to show compliance, should be less than or equal to the EPI Ratio listed in §9.5 for the applicable building type and climate zone.
New buildings with completed fit-outs shall comply with either the provisions of §3.2.1 and either the provision of §3.2.2 or §3.2.3.
New core and shell building shall comply with the provisions of §3.2.1 and either the provision of §3.2.2 or §3.2.3 following base building systems in the common areas:
Additionally, the tenant lease agreement shall have a legal undertaking clause to ensure interior fit-outs made by tenant shall be Code compliant. The legal undertaking shall mandate the relevant energy efficiency compliance requirements in accordance with the provisions of §3.2.1 and §3.2.2 for all interior fit-outs within the tenant leased area,
If any existing building after additions or alterations changes its connected load to 100 kilo-Watt (kW) or above or a contract demand of 120 kilo-Volt Ampere (kVA) or above shall comply with the provisions of §4 through §7. Compliance may be demonstrated in either of the following ways:
Exceptions to §3.3.2:
When space conditioning is provided by existing systems and equipment, the existing systems and equipment need not comply with this code. However, any new equipment installed must comply with specific requirements applicable to that equipment.
A building following the whole building performance method of §9 or Total System Efficiency – Alternate compliance approach of §5_3_12 shall show compliance through online BEP-EMIS or whole building energy simulation software endorsed by BEE.
Compliance to the daylight requirements of §4.2.3, if calculated through software tools, shall be shown through online BEP-EMIS or daylighting software approved by BEE.
Administrative requirements, including but not limited to, permit requirements, enforcement, interpretations, claims of exemption, approved calculation methods, and rights of appeal are specified by the authority having jurisdiction.
Construction drawings and specifications shall show all pertinent data and features of the building, equipment, and systems in sufficient detail to permit the authority having jurisdiction to verify that the building complies with the requirements of this code. Details shall include, but are not limited to:
The authority having jurisdiction may require supplemental information necessary to verify compliance with this code, such as calculations, worksheets, compliance forms, manufacturer’s literature, or other data.
The building envelope shall comply with the mandatory provisions of §4.2, and the prescriptive criteria of §4.3. In case alternative compliance path of Building Envelope Trade-off Method is used for compliance, requirements of §4.3.5 and relevant criteria of §4.3 shall be met.
U-factors shall be determined for the overall fenestration product (including the sash and frame) in accordance with ISO-15099 by an accredited independent laboratory, and labeled or certified by the manufacturer. U-factors for sloped glazing and skylights shall be determined at a slope of 20 degrees above the horizontal. For unrated products, use the default table in Appendix A.
SHGC shall be determined for the overall single or multi glazed fenestration product (including the sash and frame) in accordance with ISO-15099 by an accredited independent laboratory, and labeled or certified by the manufacturer.
Exceptions to §4.2.1.2:
Visible light transmittance (VLT) shall be determined for the fenestration product in accordance with ISO-15099 by an accredited independent laboratory, and labeled or certified by the manufacturer. For unrated products, VLT of the glass alone shall be de-rate by 10% for demonstrating compliance with the VLT requirements for the overall fenestration product.
U-factors shall be calculated for the opaque construction in accordance with ISO-6946. Testing shall be done in accordance with approved ISO Standard for respective insulation type by an accredited independent laboratory, and labeled or certified by the manufacturer. For unrated products, use the default tables in Appendix A.
Solar reflectance for the external opaque roof construction shall be determined in accordance with ASTM E903-96 by an accredited independent laboratory, and labeled or certified by the manufacturer.
Emittance for the external opaque roof construction shall be determined in accordance with ASTM E408-71 (RA 1996) by an accredited independent laboratory, and labeled or certified by the manufacturer.
Above grade floor areas shall meet or exceed the useful daylight illuminance (UDI) area requirements listed in Table 4-1 for 90% of the potential daylit time in a year. Mixed-use buildings shall show compliance as per the criteria prescribed in §2.5. Compliance shall be demonstrated either through daylighting simulation method in §4.2.3.1 or the manual method in §4.2.3.2 . Assembly buildings and other buildings where daylighting will interfere with the functions or processes of 50% (or more) of the building floor area, are exempted from meeting the requirements listed in Table 4-1.
Exceptions to §4.2.3:
Assembly buildings and other buildings where daylighting will interfere with the functions or processes of 50% (or more) of the building floor area, are exempted from meeting the requirements listed in Table 4-1.
Table 4-1 Daylight Requirement | |||
---|---|---|---|
Building Category | Percentage of above grade floor area meeting the UDI requirement | ||
ECBC | ECBC+ | SuperECBC | |
Business, Educational | 40% | 50% | 60% |
No Star Hotel, Star Hotel, Healthcare | 30% | 40% | 50% |
Resort | 45% | 55% | 65% |
Shopping Complex | 10% | 15% | 20% |
Assembly | Exempted |
Only BEE approved software shall be used to demonstrate compliance through the daylighting simulation method. Buildings shall achieve illuminance level between 100 lux and 2,000 lux for the minimum percentage of floor area prescribed in Table 4-1 for at least 90% of the potential daylit time. Illuminance levels for all spaces enclosed by permanent internal partitions (opaque, translucent, or transparent) with height greater or equal to 2 m from the finished floor, shall be measured as follows:
Table 4-2 Default Values for Surface Reflectance | |
---|---|
Surface Type | Reflectance |
Wall or Vertical Internal Surfaces | 50% |
Ceiling | 70% |
Floor | 20% |
Furniture (permanent) | 50% |
This method can be used for demonstrating compliance with daylighting requirements without simulation. Daylight extent factors (DEF) mentioned in Table 4-3 shall be used for manually calculating percentage of above grade floor area meeting the UDI requirement for 90% of the potential daylit time in a year.
Table 4-3 Daylight Extent Factors (DEF) for Manually Calculating Daylight Area | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Shading | Latitude | Window Type | VLT < 0.3 | VLT ≥ 0.3 | ||||||
N | S | E | W | N | S | E | W | |||
No shading or PF < 0.4 | ≥15°N | All window types | 2.5 | 2.0 | 0.7 | 0.5 | 2.8 | 2.2 | 1.1 | 0.7 |
< 15°N | 2.4 | 2.0 | 0.8 | 0.6 | 2.7 | 2.2 | 1.5 | 0.8 | ||
Shading with PF ≥ 0.4 | All latitudes | All window types without light shelf* | 2.8 | 2.3 | 1.5 | 1.1 | 3.0 | 2.5 | 1.8 | 1.5 |
Window with light shelf* | 3.0 | 2.5 | 1.8 | 1.6 | 3.5 | 3.0 | 2.1 | 1.8 | ||
* To qualify as light shelf the internal projection shall meet the requirements specified under Exceptions to SHGC requirements in Table 4-10 and Table 4-11 (w) |
Following areas of the building envelope, of all except naturally ventilated buildings or spaces, shall be sealed, caulked, gasketed, or weather-stripped:
Roofs shall comply with the maximum assembly U-factors in Table 4-4 through Table 4-6. The roof insulation shall be applied externally as part of the roof assembly and not as a part of false ceiling.
Table 4-4 Roof Assembly U-factor (W/m2.K) Requirements for ECBC Compliant Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
All building types, except below | 0.33 | 0.33 | 0.33 | 0.33 | 0.28 |
School <10,000 m2 AGA | 0.47 | 0.47 | 0.47 | 0.47 | 0.33 |
Hospitality > 10,000 m2 AGA | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
Table 4-5 Roof Assembly U-factor (W/m2.K) Requirements for ECBC+ Compliant Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
Hospitality, Healthcare Assembly |
0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
Business Educational Shopping Complex |
0.26 | 0.26 | 0.26 | 0.26 | 0.20 |
Table 4-6 Roof Assembly U-factor (W/m2.K) Requirements for SuperECBC Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
All buildings types | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
All roofs that are not covered by solar photovoltaics, or solar hot water, or any other renewable energy system, or utilities and services that render it unsuitable for the purpose, shall be either cool roofs or vegetated roofs.
Opaque above grade external walls shall comply with the maximum assembly U-factors in Table 4-7 through Table 4-9.
Table 4-7 Opaque Assembly Maximum U-factor (W/m2.K) Requirements for a ECBC compliant Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
All building types, except below | 0.40 | 0.40 | 0.40 | 0.55 | 0.34 |
No Star Hotel < 10,000 m2 AGA | 0.63 | 0.63 | 0.63 | 0.63 | 0.40 |
Business < 10,000 m2 AGA | 0.63 | 0.63 | 0.63 | 0.63 | 0.40 |
School <10,000 m2 AGA | 0.85 | 0.85 | 0.85 | 1.00 | 0.40 |
Table 4-8 Opaque Assembly Maximum U-factor (W/m2.K) Requirements for ECBC+ Compliant Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
All building types, except below | 0.34 | 0.34 | 0.34 | 0.55 | 0.22 |
No Star Hotel < 10,000 m2 AGA | 0.44 | 0.44 | 0.44 | 0.44 | 0.34 |
Business < 10,000 m2 AGA | 0.44 | 0.44 | 0.44 | 0.55 | 0.34 |
School < 10,000 m2 AGA | 0.63 | 0.63 | 0.63 | 0.75 | 0.44 |
Table 4-9 Opaque Assembly Maximum U-factor (W/m2.K) Requirements for SuperECBC Building | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
All building types | 0.22 | 0.22 | 0.22 | 0.22 | 0.22 |
Exceptions to §4.3.2: Opaque external walls of an unconditioned building of No Star Hotel, Healthcare, and School categories in all climatic zones, except for cold climatic zone, shall have a maximum assembly U-factor of 0.8 W/m2.K.
For all climatic zones, vertical fenestration compliance requirements for all three energy efficiency levels, i.e. ECBC, ECBC+, and SuperECBC, shall comply with the following:
Vertical fenestration shall comply with the maximum Solar Heat Gain Coefficient (SHGC) and U-factor requirements of Table 4-10 for ECBC buildings and Table 4-11 for ECBC+ buildings and SuperECBC buildings. Vertical fenestration on non-cardinal direction, shall be categorized under a particular cardinal direction if its orientation is within ± 45° of that cardinal direction.
Table 4-10 Vertical Fenestration Assembly U-factor and SHGC Requirements for ECBC Buildings | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
Maximum U-factor (W/m2.K) | 3.00 | 3.00 | 3.00 | 3.00 | 3.00 |
Maximum SHGC Non-North | 0.27 | 0.27 | 0.27 | 0.27 | 0.62 |
Maximum SHGC North for latitude ≥ 15°N | 0.50 | 0.50 | 0.50 | 0.50 | 0.62 |
Maximum SHGC North for latitude < 15°N | 0.27 | 0.27 | 0.27 | 0.27 | 0.62 |
See Appendix A for default values of unrated fenestration. |
Table 4-11 Vertical Fenestration U-factor and SHGC Requirements for ECBC+ buildings and SuperECBC buildings | |||||
---|---|---|---|---|---|
Composite | Hot and dry | Warm and humid | Temperate | Cold | |
Maximum U-factor (W/m2.K) | 2.20 | 2.20 | 2.20 | 3.00 | 1.80 |
Maximum SHGC Non-North | 0.25 | 0.25 | 0.25 | 0.25 | 0.62 |
Maximum SHGC North for latitude ≥ 15°N | 0.50 | 0.50 | 0.50 | 0.50 | 0.62 |
Maximum SHGC North for latitude < 15°N | 0.25 | 0.25 | 0.25 | 0.25 | 0.62 |
Exceptions to SHGC requirements in Table 4-10 and Table 4-11:
Table 4-12 Shading Equivalent Factors for Latitudes greater than or equal to 15 ºN | |||||||||
---|---|---|---|---|---|---|---|---|---|
SEF | PF | North | East | South | West | North-East | South-East | South-West | North-West |
Overhang + Fins | 0.25 | 1.25 | 1.37 | 1.58 | 1.36 | 1.47 | 1.47 | 1.42 | 1.53 |
0.3 | 1.29 | 1.48 | 1.72 | 1.43 | 1.54 | 1.65 | 1.57 | 1.58 | |
0.35 | 1.34 | 1.58 | 1.88 | 1.51 | 1.62 | 1.81 | 1.73 | 1.65 | |
0.4 | 1.39 | 1.67 | 2.06 | 1.61 | 1.70 | 1.97 | 1.89 | 1.75 | |
0.45 | 1.43 | 1.76 | 2.26 | 1.71 | 1.78 | 2.11 | 2.06 | 1.87 | |
0.5 | 1.47 | 1.85 | 2.47 | 1.83 | 1.86 | 2.25 | 2.23 | 2.00 | |
0.55 | 1.51 | 1.94 | 2.69 | 1.96 | 1.94 | 2.38 | 2.40 | 2.13 | |
0.6 | 1.55 | 2.03 | 2.92 | 2.09 | 2.02 | 2.51 | 2.58 | 2.27 | |
0.65 | 1.59 | 2.13 | 3.15 | 2.24 | 2.10 | 2.64 | 2.76 | 2.40 | |
0.7 | 1.63 | 2.24 | 3.18 | 2.39 | 2.18 | 2.77 | 2.94 | 2.53 | |
0.75 | 1.66 | 2.37 | 3.19 | 2.56 | 2.25 | 2.90 | 3.12 | 2.64 | |
0.8 | 1.70 | 2.52 | 3.20 | 2.72 | 2.33 | 3.04 | 3.18 | 2.73 | |
0.85 | 1.73 | 2.69 | 3.21 | 2.90 | 2.40 | 3.11 | 3.23 | 2.80 | |
0.9 | 1.76 | 2.89 | 3.24 | 3.07 | 2.46 | 3.15 | 3.25 | 2.84 | |
0.95 | 1.79 | 3.11 | 3.28 | 3.25 | 2.52 | 3.17 | 3.27 | 2.85 | |
≥1 | 1.80 | 3.30 | 3.33 | 3.33 | 2.57 | 3.23 | 3.30 | 2.82 | |
Overhang | 0.25 | 1.09 | 1.21 | 1.28 | 1.20 | 1.17 | 1.26 | 1.23 | 1.20 |
0.3 | 1.11 | 1.26 | 1.34 | 1.27 | 1.22 | 1.32 | 1.27 | 1.24 | |
0.35 | 1.13 | 1.30 | 1.39 | 1.33 | 1.26 | 1.39 | 1.32 | 1.28 | |
0.4 | 1.15 | 1.35 | 1.46 | 1.38 | 1.30 | 1.46 | 1.38 | 1.32 | |
0.45 | 1.16 | 1.40 | 1.52 | 1.43 | 1.33 | 1.53 | 1.46 | 1.36 | |
0.5 | 1.18 | 1.45 | 1.59 | 1.48 | 1.35 | 1.60 | 1.54 | 1.40 | |
0.55 | 1.20 | 1.51 | 1.66 | 1.52 | 1.38 | 1.67 | 1.62 | 1.44 | |
0.6 | 1.21 | 1.56 | 1.73 | 1.57 | 1.40 | 1.74 | 1.70 | 1.47 | |
0.65 | 1.22 | 1.62 | 1.81 | 1.61 | 1.42 | 1.81 | 1.79 | 1.51 | |
0.7 | 1.24 | 1.68 | 1.88 | 1.66 | 1.45 | 1.88 | 1.87 | 1.55 | |
0.75 | 1.25 | 1.74 | 1.95 | 1.72 | 1.48 | 1.94 | 1.94 | 1.58 | |
0.8 | 1.26 | 1.80 | 2.02 | 1.77 | 1.51 | 2.00 | 2.01 | 1.61 | |
0.85 | 1.27 | 1.86 | 2.09 | 1.84 | 1.56 | 2.06 | 2.06 | 1.64 | |
0.9 | 1.28 | 1.92 | 2.15 | 1.91 | 1.61 | 2.11 | 2.10 | 1.67 | |
0.95 | 1.29 | 1.99 | 2.21 | 1.98 | 1.67 | 2.15 | 2.13 | 1.70 | |
≥1 | 1.30 | 2.06 | 2.26 | 2.07 | 1.75 | 2.19 | 2.14 | 1.72 | |
Side Fins | 0.25 | 1.13 | 1.11 | 1.18 | 1.11 | 1.21 | 1.14 | 1.16 | 1.23 |
0.3 | 1.15 | 1.13 | 1.22 | 1.13 | 1.22 | 1.17 | 1.22 | 1.27 | |
0.35 | 1.17 | 1.15 | 1.26 | 1.15 | 1.24 | 1.20 | 1.26 | 1.32 | |
0.4 | 1.19 | 1.17 | 1.29 | 1.17 | 1.27 | 1.23 | 1.29 | 1.36 | |
0.45 | 1.21 | 1.19 | 1.32 | 1.19 | 1.30 | 1.25 | 1.31 | 1.41 | |
0.5 | 1.22 | 1.20 | 1.35 | 1.20 | 1.34 | 1.27 | 1.33 | 1.46 | |
0.55 | 1.24 | 1.22 | 1.38 | 1.22 | 1.38 | 1.29 | 1.34 | 1.50 | |
0.6 | 1.25 | 1.23 | 1.40 | 1.23 | 1.42 | 1.31 | 1.35 | 1.55 | |
0.65 | 1.27 | 1.24 | 1.42 | 1.25 | 1.47 | 1.32 | 1.36 | 1.58 | |
0.7 | 1.28 | 1.26 | 1.44 | 1.26 | 1.51 | 1.34 | 1.36 | 1.61 | |
0.75 | 1.30 | 1.27 | 1.46 | 1.27 | 1.55 | 1.35 | 1.37 | 1.64 | |
0.8 | 1.31 | 1.28 | 1.48 | 1.29 | 1.59 | 1.37 | 1.38 | 1.65 | |
0.85 | 1.32 | 1.30 | 1.49 | 1.30 | 1.62 | 1.38 | 1.39 | 1.65 | |
0.9 | 1.34 | 1.31 | 1.51 | 1.31 | 1.65 | 1.40 | 1.40 | 1.64 | |
0.95 | 1.35 | 1.32 | 1.53 | 1.32 | 1.67 | 1.42 | 1.42 | 1.61 | |
≥1 | 1.36 | 1.33 | 1.55 | 1.33 | 1.69 | 1.44 | 1.45 | 1.57 |
Table 4-13 Shading Equivalent Factors for Latitudes less than 15 ºN | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
SEF | PF | North | East | South | West | North-East | South-East | South-West | North-West | |||
Overhang + Fins | 0.25 | 1.38 | 1.33 | 1.30 | 1.34 | 1.42 | 1.41 | 1.37 | 1.42 | |||
0.3 | 1.44 | 1.42 | 1.35 | 1.42 | 1.49 | 1.46 | 1.41 | 1.52 | ||||
0.35 | 1.50 | 1.50 | 1.42 | 1.50 | 1.57 | 1.52 | 1.47 | 1.63 | ||||
0.4 | 1.56 | 1.59 | 1.50 | 1.59 | 1.66 | 1.59 | 1.54 | 1.73 | ||||
0.45 | 1.61 | 1.67 | 1.59 | 1.69 | 1.76 | 1.67 | 1.61 | 1.84 | ||||
0.5 | 1.67 | 1.76 | 1.68 | 1.80 | 1.87 | 1.75 | 1.70 | 1.94 | ||||
0.55 | 1.72 | 1.85 | 1.79 | 1.90 | 1.98 | 1.85 | 1.80 | 2.05 | ||||
0.6 | 1.77 | 1.94 | 1.89 | 2.02 | 2.09 | 1.94 | 1.89 | 2.15 | ||||
0.65 | 1.82 | 2.02 | 1.99 | 2.13 | 2.20 | 2.04 | 2.00 | 2.25 | ||||
0.7 | 1.86 | 2.11 | 2.08 | 2.24 | 2.31 | 2.15 | 2.10 | 2.36 | ||||
0.75 | 1.90 | 2.19 | 2.17 | 2.35 | 2.42 | 2.25 | 2.21 | 2.46 | ||||
0.8 | 1.94 | 2.28 | 2.25 | 2.46 | 2.53 | 2.35 | 2.31 | 2.55 | ||||
0.85 | 1.98 | 2.36 | 2.31 | 2.56 | 2.64 | 2.45 | 2.42 | 2.65 | ||||
0.9 | 2.02 | 2.44 | 2.35 | 2.66 | 2.74 | 2.54 | 2.52 | 2.74 | ||||
0.95 | 2.05 | 2.51 | 2.38 | 2.75 | 2.84 | 2.63 | 2.61 | 2.83 | ||||
≥1 | 2.08 | 2.58 | 2.38 | 2.83 | 2.93 | 2.71 | 2.70 | 2.91 | ||||
Overhang | 0.25 | 1.15 | 1.19 | 1.09 | 1.20 | 1.17 | 1.08 | 1.04 | 1.18 | |||
0.3 | 1.17 | 1.23 | 1.07 | 1.24 | 1.22 | 1.12 | 1.08 | 1.21 | ||||
0.35 | 1.20 | 1.28 | 1.07 | 1.29 | 1.26 | 1.16 | 1.12 | 1.25 | ||||
0.4 | 1.22 | 1.32 | 1.07 | 1.33 | 1.30 | 1.19 | 1.17 | 1.29 | ||||
0.45 | 1.24 | 1.37 | 1.09 | 1.38 | 1.33 | 1.23 | 1.21 | 1.32 | ||||
0.5 | 1.26 | 1.42 | 1.12 | 1.42 | 1.37 | 1.28 | 1.25 | 1.35 | ||||
0.55 | 1.28 | 1.46 | 1.15 | 1.46 | 1.40 | 1.32 | 1.29 | 1.39 | ||||
0.6 | 1.30 | 1.51 | 1.18 | 1.50 | 1.43 | 1.36 | 1.33 | 1.42 | ||||
0.65 | 1.32 | 1.55 | 1.22 | 1.55 | 1.46 | 1.40 | 1.37 | 1.45 | ||||
0.7 | 1.33 | 1.60 | 1.26 | 1.59 | 1.48 | 1.43 | 1.40 | 1.48 | ||||
0.75 | 1.35 | 1.64 | 1.29 | 1.62 | 1.51 | 1.47 | 1.44 | 1.50 | ||||
0.8 | 1.37 | 1.67 | 1.32 | 1.66 | 1.53 | 1.51 | 1.47 | 1.53 | ||||
0.85 | 1.38 | 1.71 | 1.35 | 1.70 | 1.55 | 1.54 | 1.51 | 1.56 | ||||
0.9 | 1.39 | 1.74 | 1.37 | 1.73 | 1.57 | 1.56 | 1.54 | 1.58 | ||||
0.95 | 1.40 | 1.77 | 1.38 | 1.77 | 1.59 | 1.59 | 1.56 | 1.61 | ||||
≥1 | 1.41 | 1.79 | 1.38 | 1.80 | 1.61 | 1.61 | 1.59 | 1.63 | ||||
Side Fins | 0.25 | 1.17 | 1.10 | 1.06 | 1.10 | 1.15 | 1.14 | 1.16 | 1.16 | |||
0.3 | 1.20 | 1.12 | 1.11 | 1.12 | 1.18 | 1.18 | 1.21 | 1.19 | ||||
0.35 | 1.12 | 1.13 | 1.16 | 1.14 | 1.21 | 1.20 | 1.25 | 1.22 | ||||
0.4 | 1.26 | 1.15 | 1.20 | 1.15 | 1.24 | 1.23 | 1.29 | 1.25 | ||||
0.45 | 1.28 | 1.16 | 1.23 | 1.17 | 1.27 | 1.25 | 1.31 | 1.28 | ||||
0.5 | 1.30 | 1.18 | 1.25 | 1.19 | 1.30 | 1.27 | 1.34 | 1.30 | ||||
0.55 | 1.32 | 1.19 | 1.27 | 1.20 | 1.33 | 1.29 | 1.36 | 1.33 | ||||
0.6 | 1.34 | 1.20 | 1.29 | 1.22 | 1.36 | 1.31 | 1.37 | 1.35 | ||||
0.65 | 1.36 | 1.21 | 1.30 | 1.23 | 1.38 | 1.34 | 1.38 | 1.38 | ||||
0.7 | 1.38 | 1.22 | 1.31 | 1.24 | 1.41 | 1.36 | 1.40 | 1.40 | ||||
0.75 | 1.40 | 1.23 | 1.33 | 1.26 | 1.43 | 1.38 | 1.41 | 1.42 | ||||
0.8 | 1.42 | 1.24 | 1.34 | 1.27 | 1.46 | 1.41 | 1.43 | 1.44 | ||||
0.85 | 1.43 | 1.25 | 1.35 | 1.28 | 1.48 | 1.44 | 1.45 | 1.47 | ||||
0.9 | 1.45 | 1.26 | 1.37 | 1.29 | 1.50 | 1.47 | 1.47 | 1.49 | ||||
0.95 | 1.46 | 1.27 | 1.39 | 1.31 | 1.52 | 1.50 | 1.50 | 1.51 | ||||
≥1 | 1.47 | 1.28 | 1.42 | 1.32 | 1.53 | 1.54 | 1.53 | 1.53 |
Exceptions to U-factor requirements in Table 4-10 and Table 4-11,
Vertical fenestration on all unconditioned buildings or unconditioned spaces may have a maximum U-factor of 5 W/m2.K provided they comply with all conditions mentioned in Table 4-14.
Table 4-14 U-factor (W/m2.K) Exemption Requirements for Shaded Building | |||||
---|---|---|---|---|---|
Building Type | Climate zone | Orientation | Maximum Effective SHGC | Minimum VLT | PF |
Unconditioned buildings or unconditioned spaces | All except cold | Non-North for all latitudes and North for latitude < 15°N | 0.27 | 0.27 | ≥0.40 |
North for latitude ≥ 15°N | 0.27 | 0.27 | ≥0.0 |
Skylights shall comply with the maximum U-factor and maximum SHGC requirements of Table 4-15. Skylight roof ratio (SRR), defined as the ratio of the total skylight area of the roof, measured to the outside of the frame, to the gross exterior roof area, is limited to a maximum of 5% for ECBC Building, ECBC+ Building, and SuperECBC Building, when using the Prescriptive Method for compliance.
Table 4-15 Skylight U-factor (W/m2.K) and SHGC Requirements | ||
---|---|---|
Climate | Maximum U-factor | Maximum SHGC |
All climatic zones | 4.25 | 0.35 |
Exception to §4.3.4 Skylights in temporary roof coverings or awnings over unconditioned spaces.
The building envelope complies with the code if the Envelope Performance Factor (EPF) of the Proposed Building is less than the EPF of the Standard Building, where the Standard Building exactly complies with the prescriptive requirements of building envelope. This method shall not be used for buildings with WWR>40%. Trade-off is not permitted for skylights. Skylights shall meet requirements of 4.3.4. The envelope performance factor shall be calculated using the following equations.
Values of "c" are taken from Table 4-16 through Table 4-20 for each class of construction.
Table 4-16 Envelope Performance Factor Coefficients – Composite Climate | |||||
---|---|---|---|---|---|
Daytime Business, Educational, Shopping Complex | 24-hour Business, Hospitality, Health Care, Assembly | ||||
C factor U-factor | C factorSHGC | C factor U-factor | C factorSHGC | ||
Walls | 24.3 | - | 48.1 | - | |
Roofs | 40.9 | - | 71.0 | - | |
North Windows | 21.6 | 201.8 | 41.0 | 367.6 | |
South Windows | 19.1 | 342.5 | 41.0 | 546.3 | |
East Windows | 18.8 | 295.6 | 38.4 | 492.2 | |
West Windows | 19.2 | 295.4 | 38.3 | 486.1 |
Table 4-17 Envelope Performance Factor Coefficients – Hot and Dry Climate | |||||
---|---|---|---|---|---|
Daytime Business, Educational, Shopping Complex | 24-hour Business, Hospitality, Health Care, Assembly | ||||
C factor U-factor | C factorSHGC | C factor U-factor | C factorSHGC | ||
Walls | 27.3 | - | 55.9 | - | |
Roofs | 43.9 | - | 80.7 | - | |
North Windows | 23.7 | 238.2 | 49.1 | 414.4 | |
South Windows | 22.8 | 389.7 | 49.2 | 607.4 | |
East Windows | 21.6 | 347.4 | 46.2 | 556.2 | |
West Windows | 21.7 | 354.1 | 46.0 | 560.8 |
Table 4-18 Envelope Performance Factor Coefficients – Warm and Humid Climate | |||||
---|---|---|---|---|---|
Daytime Business, Educational, Shopping Complex | 24-hour Business, Hospitality, Health Care, Assembly | ||||
C factor U-factor | C factorSHGC | C factor U-factor | C factorSHGC | ||
Walls | 24.5 | - | 51.2 | - | |
Roofs | 40.1 | - | 76.1 | - | |
North Windows | 20.7 | 230.7 | 43.6 | 401.5 | |
South Windows | 20.1 | 347.1 | 43.9 | 546.4 | |
East Windows | 19.0 | 301.8 | 41.1 | 490.6 | |
West Windows | 18.7 | 303.1 | 40.5 | 483.5 |
Table 4-19 Envelope Performance Factor Coefficients – Temperate Climate | |||||
---|---|---|---|---|---|
Daytime Business, Educational, Shopping Complex | 24-hour Business, Hospitality, Health Care, Assembly | ||||
C factor U-factor | C factorSHGC | C factor U-factor | C factorSHGC | ||
Walls | 17.2 | - | 39.1 | - | |
Roofs | 32.3 | - | 76.1 | - | |
North Windows | 12.6 | 201.4 | 32.3 | 338.41 | |
South Windows | 11.8 | 287.3 | 31.9 | 448.52 | |
East Windows | 11.2 | 300.0 | 29.9 | 470.35 | |
West Windows | 10.9 | 303.4 | 30.0 | 462.64 |
Table 4-20 Envelope Performance Factor Coefficients – Cold Climate | |||||
---|---|---|---|---|---|
Daytime Business, Educational, Shopping Complex | 24-hour Business, Hospitality, Health Care, Assembly | ||||
C factor U-factor | C factorSHGC | C factor U-factor | C factorSHGC | ||
Walls | 36.3 | - | 30.7 | - | |
Roofs | 38.7 | - | 46.0 | - | |
North Windows | 21.8 | 137.6 | 28.3 | 163.86 | |
South Windows | 20.8 | 114.3 | 21.7 | 295.24 | |
East Windows | 22.7 | 127.5 | 24.1 | 283.20 | |
West Windows | 23.4 | 133.2 | 25.2 | 270.33 |
EPF of the Standard Building shall be calculated as follows:
All heating, ventilation, air conditioning equipment and systems, and their controls shall comply with the mandatory provisions of §5.2 and the prescriptive criteria of §5.3 for the respective building energy efficiency level. In case alternative compliance path of Total System Efficiency or Low Energy Systems is used for compliance, respective requirements of §5.3.13 or §5.3.14 and relevant criteria of §5.3 shall be met.
Naturally ventilated buildings shall:
Buildings that are ventilated using a mechanical ventilation system that are ventilated with a mechanical system, either completely or in conjunction with natural ventilation systems, shall:
Mechanical ventilation systems shall have demand control ventilation if they provide outdoor air greater than 1,500 liters per second, to a space greater than 50 m2, with occupant density exceeding 40 people per 100 m2 of the space, and are served by one or more of the following systems:
Exceptions to §5.2.1.3:
Unitary air-conditioners shall meet or exceed the efficiency requirements given in Table 5-1 through Table 5-3. Window and split air conditioners shall be certified under BEE’s Star Labeling Program. EER shall be as per IS 8148 for all unitary, split, packaged air conditioners greater than 10 kWr.
Table 5-1 Minimum Requirements for Unitary, Split, Packaged Air Conditioners in ECBC Building | ||
---|---|---|
Cooling Capacity (kWr) | Water Cooled | Air Cooled |
≤ 10.5 | NA | BEE 3 Star |
> 10.5 | 3.3 EER | 2.8 EER |
Variable Refrigerant Flow (VRF) systems shall meet or exceed the efficiency requirements specified in Table 5-2 as per the ANSI/AHRI Standard 1230 while the Indian Standard on VRF is being developed. BEE Standards and Labeling requirements for VRF shall take precedence over the current minimum requirement.
Table 5-2 Minimum Efficiency Requirements for VRF Air conditioners for ECBC Building* | |||
---|---|---|---|
For Heating or cooling or both | |||
Type | Size category (kWr) | EER (W/W) | IEER |
VRF Air Conditioners, Air cooled | < 40 | 3.28 | 4.36 |
≥ 40 and < 70 | 3.26 | 4.34 | |
≥ 70 | 3.02 | 4.07 | |
* The revised EER and IEER values as per Indian Standard for VRF corresponding to values in this table will supersede as and when the revised standards are published. |
Air conditioning and condensing units serving computer rooms shall meet or exceed the energy efficiency requirements listed in Table 5-3.
Table 5-3 Minimum Efficiency Requirements for Computer Room Air Conditioners | |||
---|---|---|---|
Equipment type | Net Sensible Cooling Capacitya | Minimum SCOP-127b | |
Downflow | Upflow | ||
All types of computer room ACs Air/ Water/ Glycol | All capacity | 2.5 | 2.5 |
|
Gas and oil fired boilers shall meet or exceed the minimum efficiency requirements specified in Table 5-4.
Table 5-4 Minimum Efficiency Requirements for Oil and Gas Fired Boilers for ECBC building | |||
---|---|---|---|
Equipment Type | Sub Category | Size Category | Minimum FUE |
Boilers, Hot Water | Gas or oil fired | All capacity | 80% |
FUE - fuel utilization efficiency |
To comply with the Code, buildings shall meet the requirements of §5.2.3.1 through §5.2.3.5.
Mechanical cooling and heating systems in Universities and Training Institutions of all sizes and all Shopping Complexes with built up area greater than 20,000 m2 shall be controlled by timeclocks that:
Exceptions to §5.2.3.1:
Mechanical heating and cooling equipment in all buildings shall be installed with controls to manage the temperature inside the conditioned zones. Each floor or a building block shall be installed with at least one control to manage the temperature. These controls should meet the following requirements:
Occupancy controls shall be installed to de-energize or to throttle to minimum the ventilation and/or air conditioning systems when there are no occupants in:
Cooling towers in buildings with built up area greater than 20,000 m2, shall have fan controls based on wet bulb logic, with either:
All air supply and exhaust equipment, having a Variable Frequency Drive (VFD), shall have dampers that automatically close upon:
Piping for heating, space conditioning, and service hot water systems shall meet the insulation requirements listed in Table 5-7 through Table 5-9. Insulation exposed to weather shall be protected by aluminum sheet metal, painted canvas, or plastic cover. Cellular foam insulation shall be protected as above, or be painted with water retardant paint.
Exceptions to §5.2.4.1:
Table 5-5 Insulation Requirements for Pipes in ECBC Building | ||
---|---|---|
Operating Temperature (ºC) | Pipe size (mm) | |
<40 | ≥40 | |
Insulation R value (m2.K/W) | ||
Heating System | ||
> 94°C & <= 121°C | 0.9 | 1.2 |
> 60°C & <= 94°C | 0.7 | 0.7 |
> 40°C & <= 60°C | 0.4 | 0.7 |
Cooling System | ||
> 4.5°C & <= 15°C | 0.4 | 0.7 |
< 4.5°C | 0.9 | 1.2 |
Refrigerant Piping (Split systems) | ||
> 4.5°C & <= 15°C | 0.4 | 0.7 |
< 4.5°C | 0.9 | 1.2 |
Table 5-6 Insulation Requirements for Pipes in ECBC+ Building | ||
---|---|---|
Operating Temperature (ºC) | Pipe size (mm) | |
<40 | ≥40 | |
Insulation R value (m2.K/W) | ||
Heating System | ||
> 94°C & <= 121°C | 1.1 | 1.3 |
> 60°C & <= 94°C | 0.8 | 0.8 |
> 40°C & <= 60°C | 0.5 | 0.9 |
Cooling System | ||
> 4.5°C & <= 15°C | 0.5 | 0.9 |
< 4.5°C | 1.1 | 1.3 |
Refrigerant Piping (Split systems) | ||
> 4.5°C & <= 15°C | 0.5 | 0.9 |
< 4.5°C | 1.1 | 1.3 |
Table 5-7 Insulation Requirements for Pipes in SuperECBC Building | ||
---|---|---|
Operating Temperature (ºC) | Pipe size (mm) | |
<25 | ≥40 | |
Insulation R value (m2.K/W) | ||
Heating System | ||
> 94°C & <= 121°C | 1.5 | 1.5 |
> 60°C & <= 94°C | 1.0 | 1.3 |
> 40°C & <= 60°C | 0.7 | 1.1 |
Cooling System | ||
> 4.5°C & <= 15°C | 0.7 | 1.2 |
< 4.5°C | 1.5 | 1.5 |
Refrigerant Piping (Split systems) | ||
> 4.5°C & <= 15°C | 0.4 | 0.7 |
< 4.5°C | 1.5 | 1.5 |
Ductwork and plenum shall be insulated in accordance with Table 5-8.
Table 5-8 Ductwork Insulation (R value in m2.K/W) Requirements | ||
---|---|---|
Duct Location | Supply ducts | Return ducts |
Exterior | R -1.4 | R -0.6 |
Unconditioned Space | R -0.6 | None |
Buried | R -0.6 | None |
System balancing shall be done for systems serving zones with a total conditioned area exceeding 500 m2.
Air systems shall be balanced in a manner to first minimize throttling losses; then, for fans with fan system power greater than 0.75 kW, fan speed shall be adjusted to meet design flow conditions.
Hydronic systems shall be proportionately balanced in a manner to first minimize throttling losses; then the pump impeller shall be trimmed or pump speed shall be adjusted to meet design flow conditions.
Condensers shall be located such that the heat sink is free of interference from heat discharge by devices located in adjoining spaces, and do not interfere with other such systems installed nearby.
Hospitality and Healthcare in all climatic zones and all buildings in cold climate zone with a hot water system, shall have solar water heating equipment installed to provide for::
Exception to §5.2.7.1: Systems that use heat recovery to provide the hot water capacity required as per the building type and size.
Service water heating equipment shall meet or exceed the performance and minimum efficiency requirements presented in available Indian Standards
Supplementary heating system shall be designed to maximize the energy efficiency of the system and shall incorporate the following design features in cascade:
Piping insulation shall comply with §5.2.4.1. The entire hot water system including the storage tanks, pipelines shall be insulated conforming to the relevant IS standards on materials and applications.
Vertical pipe risers serving storage water heaters and storage tanks not having integral heat traps and serving a non-recirculating system shall have heat traps on both the inlet and outlet piping.
All heated pools shall be provided with a vapor retardant pool cover on or at the water surface. Pools heated to more than 32°C shall have a pool cover with a minimum insulation value of R-4.1.
Compliance shall be demonstrated with the prescriptive requirements in this section. Supply, exhaust, and return or relief fans with motor power exceeding 0.37 kW shall meet or exceed the minimum energy efficiency requirements specified in Table 5-9 through Table 5-11 except the following need not comply with the requirement
Table 5-9 Mechanical and Motor Efficiency Requirements for Fans in ECBC Buildings | |||
---|---|---|---|
System type | Fan Type | Mechanical Efficiency | Motor Efficiency (As per IS 12615) |
Air-handling unit | Supply, return and exhaust | 60% | IE 2 |
Table 5-10 Mechanical and Motor Efficiency Requirements for Fans in ECBC+ Buildings | |||
---|---|---|---|
System type | Fan Type | Mechanical Efficiency | Motor Efficiency (As per IS 12615) |
Air-handling unit | Supply, return and exhaust | 65% | IE 3 |
Table 5-11 Mechanical and Motor Efficiency Requirements for Fans in SuperECBC Buildings | |||
---|---|---|---|
System type | Fan Type | Mechanical Efficiency | Motor Efficiency (As per IS 12615) |
Air-handling unit | Supply, return and exhaust | 70% | IE 4 |
Chillers shall meet or exceed the minimum efficiency requirements as per Standards and Labelling Program of BEE for ECBC+ and Super ECBC buildings.
i. Minimum 3 Star rated chillers is required for ECBC+ compliance and
ii. 5 star rated chiller to meet Super ECBC compliance.
Chilled and condenser water pumps shall meet or exceed the minimum energy efficiency requirements specified in Table 5-12 through Table 5-14. Requirements for pumps in district chiller systems and hot water pumps for space heating are limited to the installed efficiency requirement of individual pump equipment only. To show compliance, calculate the total installed pump capacity in kilo watt and achieve the prescribed limits per kilo watt of refrigeration installed in the building.
Exceptions to §5.3.2: Pumps used in processes e.g. service hot water, chilled water used for refrigeration etc.
Table 5-12 Pump Efficiency Requirements for ECBC Building | |
---|---|
Equipment | ECBC |
Chilled Water Pump (Primary and Secondary) | 18.2 W/kWr with VFD on secondary pump |
Condenser Water Pump | 17.7 W/kWr |
Pump Efficiency (minimum) | 70% |
Table 5-13 Pump Efficiency Requirements for ECBC+ Building | |
---|---|
Equipment | ECBC+ |
Chilled Water Pump (Primary and Secondary) | 16.9 W/kWr with VFD on secondary pump |
Condenser Water Pump | 16.5 W/kWr |
Pump Efficiency (minimum) | 75% |
Table 5-14 Pump Efficiency Requirements for SuperECBC Building | |
---|---|
Equipment | SuperECBC |
Chilled Water Pump (Primary and Secondary) | 14.9 W/kWr with VFD on secondary pump |
Condenser Water Pump | 14.6 W/kWr |
Pump Efficiency (minimum) | 85% |
Cooling towers shall meet or exceed the minimum efficiency requirements specified in Table 5-15. ECBC+ and SuperECBC Buildings shall have additional VFD installed in the cooling towers.
Table 5-15 Cooling Tower Efficiency Requirements for ECBC, ECBC+, and SuperECBC Buildings | ||
---|---|---|
Equipment type | Rating Condition | Efficiency |
Open circuit cooling tower Fans | 35°C entering water 29°C leaving water 24°C WB outdoor air |
0.017 kW/kWr 0.31 kW/L/s |
Gas and oil fired boilers shall meet or exceed the minimum efficiency requirements specified in Table 5-16.
Table 5-16 Minimum Efficiency Requirements for Oil and Gas Fired Boilers for ECBC+ and SuperECBC building | |||
---|---|---|---|
Equipment Type | Sub Category | Size Category | Minimum FUE |
Boilers, Hot Water | Gas or oil fired | All capacity | 85% |
FUE - fuel utilization efficiency |
Each cooling fan system in buildings with built up area greater than 20,000 m2, shall include at least one of the following:
Exception to §5.3.5.1:
Where required by §5.3.5.1 economizers shall be capable of providing partial cooling even when additional mechanical cooling is required to meet the cooling load.
Air economizer shall be equipped with controls
Air-side economizers shall be tested in the field following the requirements in §12 Appendix C to ensure proper operation.
Exception to §5.3.5.4: Air economizers installed by the HVAC system equipment manufacturer and certified to the building department as being factory calibrated and tested per the procedures in §12.
HVAC pumping systems having a total pump system power exceeding 7.5 kW shall be designed for variable fluid flow and shall be capable of reducing pump flow rates to an extent which is lesser or equal to the limit, where the limit is set by the larger of:
Water cooled air-conditioning or heat pump units with a circulation pump motor greater than or equal to 3.7 kW shall have two-way automatic isolation valves on each water-cooled air-conditioning or heat pump unit that are interlocked with the compressor to shut off condenser water flow when the compressor is not operating.
Chilled water or condenser water systems that must comply with either §5.3.6.1 or §5.3.6.2 and that have pump motors greater than or equal to 3.7 kW shall be controlled by variable speed drives.
Unitary air-conditioners shall meet or exceed the efficiency requirements given in Table 5-17 and Table 5-18. Window and split air conditioners shall be certified under BEE’s Star Labeling Program. EER shall be as per IS 8148 for all unitary, split, packaged air conditioners greater than 10 kWr.
Table 5-17 Minimum Requirements for Unitary, Split, Packaged Air Conditioners in ECBC+ Building | ||
---|---|---|
Cooling Capacity (kWr) | Water Cooled | Air Cooled |
≤ 10.5 | NA | BEE 4 Star |
> 10.5 | 3.7 EER | 3.2 EER |
Table 5-18 Minimum Requirements for Unitary, Split, Packaged Air Conditioners in SuperECBC Building | ||
---|---|---|
Cooling Capacity (kWr) | Water Cooled | Air Cooled |
≤ 10.5 | NA | BEE 5 Star |
> 10.5 | 3.9 EER | 3.4 EER |
ECBC+ building shall comply with requirements of §5.3.8 in addition to complying with requirements of §5.2.3.
ECBC+ and SuperECBC Buildings with built up area greater than 20,000 m2 shall have a building management system. All mechanical cooling and heating systems in ECBC+ and SuperECBC Buildings with any programmable logic controller (PLC) to the zone level shall have the following control capabilities to manage centralized demand shed in noncritical zones:
The centralized demand shed controls shall have additional capabilities to
Multi zone mechanical cooling and heating systems in ECBC+ and SuperECBC Buildings shall have controls that automatically reset the supply-air temperature in response to building loads or to outdoor air temperature. Controls shall reset the supply air temperature to at least 25% of the difference between the design supply air temperature and the design room air temperature.
Exception to §5.3.8.2: ECBC+ and SuperECBC Buildings in warm humid climate zone.
Chilled water systems with a design capacity exceeding 350 kWr supplying chilled water to comfort conditioning systems in ECBC+ and SuperECBC Buildings shall have controls that automatically reset supply water temperatures by representative building loads (including return water temperature) or by outdoor air temperature.
Exceptions to §5.2.8.3: Controls to automatically reset chilled water temperature shall not be required where the supply temperature reset controls causes improper operation of equipment.
SuperECBC Buildings shall comply with requirements of §5.3.9 in addition to complying with requirements of §5.2.3 and §5.3.8.
Fans in Variable Air Volume (VAV) systems in SuperECBC Buildings shall have controls or devices that will result in fan motor demand of no more than 30% of their design wattage at 50% of design airflow based on manufacturer’s certified fan data.
All Hospitality and Healthcare, with systems of capacity greater than 2,100 liters per second and minimum outdoor air supply of 70% shall have air-to-air heat recovery equipment with minimum 50% recovery effectiveness
At least 50% of heat shall be recovered from diesel and gas fired generator sets installed in Hospitality, Healthcare, and Business buildings with built up area greater than 20,000 m2.
For compliance with ECBC+ and SuperECBC,
Exception to §5.3.11: Systems that use heat recovery to provide the hot water capacity required as per the building type, size and efficiency level.
Buildings may show compliance by optimizing the total system efficiency for the plant side comfort system instead of the individual equipment mentioned under the prescriptive requirement. This alternate compliance approach is applicable for central chilled water plant side system in all building types. The total installed capacity per kilo-watt refrigeration load shall be less than or equal to maximum threshold requirements as specified in Table 5-19. Equipment that can be included in central chilled water plant side system for this alternate approach are chillers, chilled water pumps, condenser water pumps, and cooling tower fan. Compliance check will be based on annual hourly simulation refer Table 9-1 for developing the proposed design.
Table 5-19 Maximum System Efficiency Threshold for ECBC, ECBC+, and SuperECBC Buildings | |
---|---|
Water Cooled Chilled Water Plant | Maximum Threshold (kW/kWr) |
ECBC | 0.26 |
ECBC+ | 0.23 |
SuperECBC | 0.20 |
Compliance shall be documented and compliance forms shall be submitted to the authority having jurisdiction. The information submitted shall include, at a minimum, the following:
The total system efficiency shall be calculated as follows:
Total System Efficiency= (Chilled water plant use (kWh))/(Chilled water use (kWrh))
Alternative HVAC systems which have low energy use may be installed in place of (or in conjunction with) refrigerant-based cooling systems. Such systems shall be deemed to meet the minimum space conditioning equipment efficiency levels of §5.2.2, but shall comply with all other applicable mandatory provisions of §5.2 as applicable. Wherever applicable, requirements of §5.3 and §5.3.12 will be complied with. The approved list of low energy comfort systems is given below:
Buildings with an approved low-energy comfort system installed for more than 50% of the sum of cooling and heating capacity requirement of the building shall be deemed equivalent to the ECBC+ building standard prescribed in §5.2.2.
Buildings having an approved low energy comfort system installed for more than 90% of the sum of cooling and heating capacity requirement of the building shall be deemed equivalent to the SuperECBC building standard prescribed in §5.2.2.
Compliance shall be documented and submitted to the authority having jurisdiction. The information submitted shall include, at a minimum, the following:
Lighting systems and equipment shall comply with the mandatory provisions of § 6.2 and the
prescriptive criteria of § 6.3. The lighting requirements in this section shall apply to:
(a) Interior spaces of buildings,
(b) Exterior building features, including facades, illuminated roofs, architectural features,
entrances, exits, loading docks, and illuminated canopies, and,
(c) Exterior building grounds lighting that is provided through the building’s electrical
service.
Exceptions to §6.1: Emergency or security lighting that is automatically off during normal
building operations.
Exception to §6.2.1.1: Lighting systems designed for emergency and firefighting purposes.
Each space enclosed by ceiling-height partitions shall have at least one control device to independently control the general lighting within the space. Each control device shall be activated either manually by an occupant or automatically by sensing an occupant. Each control device shall
Exception to §6.2.1.2 (c): The required control device may be remotely installed if required for reasons of safety or security. A remotely located device shall have a pilot light indicator as part of or next to the control device and shall be clearly labeled to identify the controlled lighting.
Exemption to §6.2.1.4: Exterior Lighting systems designed for emergency and firefighting purposes.
The following lighting applications shall be equipped with a control device to control such lighting independently of general lighting:
Internally-illuminated exit signs shall not exceed 5 Watts per face.
The installed interior lighting power for a building or a separately metered or permitted portion of a building shall be calculated in accordance with §6.3.4 and shall not exceed the interior lighting power allowance determined in accordance with either §6.3.2 or §6.3.3.
Exception to §6.3.1: The following lighting equipment and applications shall not be considered when determining the interior lighting power allowance, nor shall the wattage for such lighting be included in the installed interior lighting power. However, any such lighting shall not be exempt unless it is an addition to general lighting and is controlled by an independent control device.
Determination of interior lighting power allowance (watts) by the building area method shall be in accordance with the following:
Determine the allowed lighting power density for each appropriate building area type from Table 6-1 for ECBC Buildings, from Table 6-2 for ECBC+ Buildings and from Table 6-3 for SuperECBC Buildings.
Table 6-1 Interior Lighting Power for ECBC Buildings – Building Area Method | |||
---|---|---|---|
Building Area Type | LPD(W/m2) | Building Area Type | LPD(W/m2) |
Office Building | 9.5 | Motion picture theater | 9.43 |
Hospitals | 9.7 | Museum | 10.2 |
Hotels | 9.5 | Post office | 10.5 |
Shopping Mall | 14.1 | Religious building | 12.0 |
University and Schools | 11.2 | Sports arena | 9.7 |
Library | 12.2 | Transportation | 9.2 |
Dining: bar lounge/leisure | 12.2 | Warehouse | 7.08 |
Dining: cafeteria/fast food | 11.5 | Performing arts theater | 16.3 |
Dining: family | 10.9 | Police station | 9.9 |
Dormitory | 9.1 | Workshop | 14.1 |
Fire station | 9.7 | Automotive facility | 9.0 |
Gymnasium | 10.0 | Convention center | 12.5 |
Manufacturing facility | 12.0 | Parking garage | 3.0 |
In cases where both a general building area type and a specific building area type are listed, the specific building area type shall apply. |
Table 6-2 Interior Lighting Power for ECBC+ Buildings – Building Area Method | |||
---|---|---|---|
Building Area Type | LPD(W/m2) | Building Area Type | LPD(W/m2) |
Office Building | 7.6 | Motion picture theater | 7.5 |
Hospitals | 7.8 | Museum | 8.2 |
Hotels | 7.6 | Post office | 8.4 |
Shopping Mall | 11.3 | Religious building | 9.6 |
University and Schools | 9.0 | Sports arena | 7.8 |
Library | 9.8 | Transportation | 7.4 |
Dining: bar lounge/leisure | 9.8 | Warehouse | 5.7 |
Dining: cafeteria/fast food | 9.2 | Performing arts theater | 13.0 |
Dining: family | 8.7 | Police station | 7.9 |
Dormitory | 7.3 | Workshop | 11.3 |
Fire station | 7.8 | Automotive facility | 7.2 |
Gymnasium | 8.0 | Convention center | 10.0 |
Manufacturing facility | 9.6 | Parking garage | 2.4 |
In cases where both a general building area type and a specific building area type are listed, the specific building area type shall apply. |
Table 6-3 Interior Lighting Power for SuperECBC Buildings – Building Area Method | |||
---|---|---|---|
Building Area Type | LPD(W/m2) | Building Area Type | LPD(W/m2) |
Office Building | 5.0 | Motion picture theater | 4.7 |
Hospitals | 4.9 | Museum | 5.1 |
Hotels | 4.8 | Post office | 5.3 |
Shopping Mall | 7.0 | Religious building | 6.0 |
University and Schools | 6.0 | Sports arena | 4.9 |
Library | 6.1 | Transportation | 4.6 |
Dining: bar lounge/leisure | 6.1 | Warehouse | 3.5 |
Dining: cafeteria/fast food | 5.8 | Performing arts theater | 8.2 |
Dining: family | 5.5 | Police station | 5.0 |
Dormitory | 4.6 | Workshop | 7.1 |
Fire station | 4.9 | Automotive facility | 4.5 |
Gymnasium | 5.0 | Convention center | 6.3 |
Manufacturing facility | 6.0 | Parking garage | 1.5 |
In cases where both a general building area type and a specific building area type are listed, the specific building area type shall apply. |
Determination of interior lighting power allowance (watts) by the space function method shall be in accordance with the following:
Table 6-4 Interior Lighting Power for ECBC Buildings – Space Function Method | |||
---|---|---|---|
Category | LPD (W/m2) | Category | LPD (W/m2) |
Common Space Types | |||
Restroom | 7.7 | Stairway | 5.5 |
Storage | 6.8 | Corridor/Transition | 7.1 |
Conference/ Meeting | 11.5 | Lobby | 9.1 |
Parking Bays (covered/ basement) | 2.2 | Parking Driveways (covered/ basement) | 3.0 |
Electrical/Mechanical | 7.1 | Workshop | 17.1 |
Business | |||
Enclosed | 10.0 | Open Plan | 10.0 |
Banking Activity Area | 12.6 | Service/Repair | 6.8 |
Healthcare | |||
Emergency | 22.8 | Recovery | 8.6 |
Exam/Treatment | 13.7 | Storage | 5.5 |
Nurses’ Station | 9.4 | Laundry/Washing | 7.5 |
Operating Room | 21.8 | Lounge/Recreation | 8.0 |
Patient Room | 7.7 | Medical Supply | 13.7 |
Pharmacy | 10.7 | Nursery | 5.7 |
Physical Therapy | 9.7 | Corridor/Transition | 9.1 |
Radiology/Imaging | 9.1 | ||
Hospitality | |||
Hotel Dining | 9.1 | Hotel Lobby | 10.9 |
For Bar Lounge/ Dining | 14.1 | Motel Dining | 9.1 |
For food preparation | 12.1 | Motel Guest Rooms | 7.7 |
Hotel Guest Rooms | 9.1 | ||
Shopping Complex | |||
Mall Concourse | 12.8 | For Family Dining | 10.9 |
Sales Area | 18.3 | For food preparation | 12.1 |
Motion Picture Theatre | 9.6 | Bar Lounge/ Dining | 14.1 |
Educational | |||
Classroom/Lecture | 13.7 | Card File and Cataloguing | 9.1 |
For Classrooms | 13.8 | Stacks (Lib) | 18.3 |
Laboratory | 15.1 | Reading Area (Library) | 10.0 |
Assembly | |||
Dressing Room | 9.1 | Seating Area - Performing Arts Theatre | 22.6 |
Exhibit Space - Convention Centre | 14.0 | Lobby - Performing Arts Theatre | 21.5 |
Seating Area - Gymnasium | 4.6 | Seating Area - Convention Centre | 6.4 |
Fitness Area - Gymnasium | 13.7 | Seating Religious Building | 16.4 |
Museum - General Exhibition | 16.4 | Playing Area - Gymnasium | 18.8 |
Museum - Restoration | 18.3 |
Table 6-5 Interior Lighting Power for ECBC+ Buildings – Space Function Method | |||
---|---|---|---|
Category | LPD (W/m2) | Category | LPD (W/m2) |
Common Space Types | |||
Restroom | 6.1 | Stairway | 4.4 |
Storage | 5.4 | Corridor/Transition | 3.6 |
Conference/ Meeting | 9.2 | Lobby | 7.3 |
Parking Bays (covered/ basement) | 1.8 | Parking Driveways (covered/ basement) | 2.5 |
Electrical/Mechanical | 5.7 | Workshop | 13.7 |
Business | |||
Enclosed | 8.6 | Open Plan | 8.6 |
Banking Activity Area | 9.3 | Service/Repair | 5.5 |
Healthcare | |||
Emergency | 18.2 | Recovery | 7.0 |
Exam/Treatment | 10.9 | Storage | 4.4 |
Nurses’ Station | 7.5 | Laundry/Washing | 6.0 |
Operating Room | 17.5 | Lounge/Recreation | 6.4 |
Patient Room | 6.1 | Medical Supply | 10.9 |
Pharmacy | 8.5 | Nursery | 4.6 |
Physical Therapy | 7.8 | Corridor/Transition | 7.3 |
Radiology/Imaging | 7.3 | ||
Hospitality | |||
Hotel Dining | 7.3 | Hotel Lobby | 8.8 |
For Bar Lounge/ Dining | 11.3 | Motel Dining | 7.3 |
For food preparation | 12.1 | Motel Guest Rooms | 6.1 |
Hotel Guest Rooms | 7.3 | ||
Shopping Complex | |||
Mall Concourse | 10.2 | For Family Dining | 8.8 |
Sales Area | 14.6 | For food preparation | 12.1 |
Motion Picture Theatre | 10.3 | Bar Lounge/ Dining | 11.3 |
Educational | |||
Classroom/Lecture | 10.9 | Card File and Cataloguing | 7.3 |
For Classrooms | 11.0 | Stacks (Lib) | 14.6 |
Laboratory | 12.1 | Reading Area (Library) | 9.2 |
Assembly | |||
Dressing Room | 7.3 | Seating Area - Performing Arts Theatre | 18.1 |
Exhibit Space - Convention Centre | 11.2 | Lobby - Performing Arts Theatre | 17.2 |
Seating Area - Gymnasium | 3.6 | Seating Area - Convention Centre | 5.1 |
Fitness Area - Gymnasium | 7.9 | Seating Religious Building | 13.1 |
Museum - General Exhibition | 11.3 | Playing Area - Gymnasium | 12.9 |
Museum - Restoration | 11.0 |
Table 6-6 Interior Lighting Power for SuperECBC Buildings – Space Function Method | |||
---|---|---|---|
Category | LPD (W/m2) | Category | LPD (W/m2) |
Common Space Types | |||
Restroom | 3.8 | Stairway | 2.7 |
Storage | 3.4 | Corridor/Transition | 2.3 |
Conference/ Meeting | 5.7 | Lobby | 4.6 |
Parking Bays (covered/ basement) | 1.1 | Parking Driveways (covered/ basement) | 1.5 |
Electrical/Mechanical | 3.5 | Workshop | 8.6 |
Business | |||
Enclosed | 5.4 | Open Plan | 5.4 |
Banking Activity Area | 5.8 | Service/Repair | 3.4 |
Healthcare | |||
Emergency | 11.4 | Recovery | 4.4 |
Exam/Treatment | 6.8 | Storage | 2.7 |
Nurses’ Station | 5.0 | Laundry/Washing | 3.8 |
Operating Room | 10.9 | Lounge/Recreation | 4.6 |
Patient Room | 3.8 | Medical Supply | 6.8 |
Pharmacy | 5.3 | Nursery | 2.9 |
Physical Therapy | 4.9 | Corridor/Transition | 4.6 |
Radiology/Imaging | 4.6 | ||
Hospitality | |||
Hotel Dining | 4.6 | Hotel Lobby | 5.5 |
For Bar Lounge/ Dining | 7.0 | Motel Dining | 4.6 |
For food preparation | 7.5 | Motel Guest Rooms | 3.8 |
Hotel Guest Rooms | 4.6 | ||
Shopping Complex | |||
Mall Concourse | 6.40 | For Family Dining | 5.5 |
Sales Area | 9.2 | For food preparation | 7.5 |
Motion Picture Theatre | 6.5 | Bar Lounge/ Dining | 7.0 |
Educational | |||
Classroom/Lecture | 6.8 | Card File and Cataloguing | 4.6 |
For Classrooms | 6.9 | Stacks (Lib) | 9.2 |
Laboratory | 7.5 | Reading Area (Library) | 5.7 |
Assembly | |||
Dressing Room | 4.6 | Seating Area - Performing Arts Theatre | 11.3 |
Exhibit Space - Convention Centre | 7.0 | Lobby - Performing Arts Theatre | 10.8 |
Seating Area - Gymnasium | 3.4 | Seating Area - Convention Centre | 3.2 |
Fitness Area - Gymnasium | 3.9 | Seating Religious Building | 8.2 |
Museum - General Exhibition | 5.7 | Playing Area - Gymnasium | 6.5 |
Museum - Restoration | 5.5 |
The installed interior lighting power calculated for compliance with §6.3 shall include all power used by the luminaires, including lamps, ballasts, current regulators, and control devices except as specifically exempted in §6.1.
Exception to §6.3.4: If two or more independently operating lighting systems in a space are controlled to prevent simultaneous user operation, the installed interior lighting power shall be based solely on the lighting system with the highest power.
Light output ratio shall be 0.7 or above. Luminaire wattage incorporated into the installed interior lighting power shall be determined in accordance with the following:
Connected lighting power of exterior lighting applications shall not exceed the lighting power limits specified in Table 6-7 for ECBC Buildings, Table 6-8 for ECBC+ Buildings and Table 6-9 for SuperECBC Buildings. Trade-offs between applications are not permitted.
Table 6-7 Exterior Building Lighting Power for ECBC Buildings | |
---|---|
Exterior lighting application | Power limits |
Building entrance (with canopy) | 10 W/m2 of canopied |
Building entrance (w/o canopy) | 90 W/ linear m of door width |
Building exit | 60 W/lin m of door width |
Building façade | 5.0 W/m2 of vertical façade area |
Emergency signs, ATM kiosks, Security areas façade | 1.0 W/m2 |
Driveways and parking (open/ external) | 1.6 W/m2 |
Pedestrian walkways | 2.0 W/m2 |
Stairways | 10.0 W/m2 |
Landscaping | 0.5 W/m2 |
Outdoor sales area | 9.0 W/m2 |
Table 6-8 Exterior Building Lighting Power for ECBC+ Buildings | |
---|---|
Exterior lighting application | Power limits |
Building entrance (with canopy) | 8 W/m2 of canopied |
Building entrance (w/o canopy) | 72 W/ linear m of door width |
Building exit | 48 W/lin m of door width |
Building façade | 4.0 W/m2 of vertical façade area |
Emergency signs, ATM kiosks, Security areas façade | 0.8 W/m2 |
Driveways and parking (open/ external) | 1.3 W/m2 |
Pedestrian walkways | 1.6 W/m2 |
Stairways | 8.0 W/m2 |
Landscaping | 0.4 W/m2 |
Outdoor sales area | 7.2 W/m2 |
Table 6-9 Exterior Building Lighting Power for SuperECBC Buildings | |
---|---|
Exterior lighting application | Power limits |
Building entrance (with canopy) | 5 W/m2 of canopied |
Building entrance (w/o canopy) | 45 W/ linear m of door width |
Building exit | 30 W/lin m of door width |
Building façade | 2.5 W/m2 of vertical façade area |
Emergency signs, ATM kiosks, Security areas façade | 0.5 W/m2 |
Driveways and parking (open/ external) | 0.8 W/m2 |
Pedestrian walkways | 1.0 W/m2 |
Stairways | 5.0 W/m2 |
Landscaping | 0.25 W/m2 |
Outdoor sales area | 4.5 W/m2 |
ECBC+ and SuperECBC Buildings shall comply with requirements of §6.3.6 in addition to complying with requirements of §6.2.
ECBC+ and SuperECBC building shall have centralized control system for schedule based automatic lighting shutoff switches.
Lighting for all exterior applications, shall have lamp efficacy not less than 80 lumens per watt, 90 lumens per watt, and 100 lumens per watt, for ECBC, ECBC+, and SuperECBC Buildings respectively, unless the luminaire is controlled by a motion sensor or exempt under §6.1.
All electric and renewable energy equipment and systems shall comply with the mandatory requirements of §7.2.
Power transformers of the proper ratings and design must be selected to satisfy the minimum
acceptable efficiency at 50% and full load rating. The permissible loss shall not exceed to
values listed in Table 7-1 for dry type transformers .BEE star rating for dry type transformer
shall take precedence over this table once notified by BEE under BEE Standards and Labelling
Program.
For oil type transformer BEE star rated transformer (BEE Standards and Labelling Program)
shall be used in all compliant buildings. Power transformers to meet compliance shall have:
(a) minimum 3 stars rating in ECBC Buildings
(b) minimum 4 stars rating in ECBC+ Buildings
(c) 5 stars rating in Super ECBC Buildingsand
Table 7-1 Permissible Losses for Dry Type Transformers | ||||
---|---|---|---|---|
Rating (kVA) | Max. Losses at 50% loading (W)* | Max. Losses at 100% loading (W)* | Max. Losses at 50% loading (W)* | Max. Losses at 100% loading (W)* |
Up to 22 kV class | 33 kV class | |||
100 | 940 | 2400 | 1120 | 2400 |
160 | 1290 | 3300 | 1420 | 3300 |
200 | 1500 | 3800 | 1750 | 4000 |
250 | 1700 | 4320 | 1970 | 4600 |
315 | 2000 | 5040 | 2400 | 5400 |
400 | 2380 | 6040 | 2900 | 6800 |
500 | 2800 | 7250 | 3300 | 7800 |
630 | 3340 | 8820 | 3950 | 9200 |
800 | 3880 | 10240 | 4650 | 11400 |
1000 | 4500 | 12000 | 5300 | 12800 |
1250 | 5190 | 13870 | 6250 | 14500 |
1600 | 6320 | 16800 | 7500 | 18000 |
2000 | 7500 | 20000 | 8880 | 21400 |
2500 | 9250 | 24750 | 10750 | 26500 |
* The total loss values given in above table are applicable for thermal classes E, B and F and have component of load loss at reference temperature according to Clause 12.7 of IS 11171 i.e. average winding temperature rise as given in Column 4 of Table 4 of IS 11171 plus 300C. i.e. for F thermal class the total loss values shall be calculated at 1200C and for H thermal class the total loss values shall be calculated at 1450C. An increase of 7% on total loss value for thermal class H is allowed.” | ||||
* The values as per Indian Standard/BEE Standard & Labeling notification for dry type transformer corresponding to values in this table will supersede as and when the Indian standards/ BEE Standard & Labeling notification are published. |
All measurement of losses shall be carried out by using calibrated digital meters of class 0.5 or better accuracy and certified by the manufacturer. All transformers of capacity of 500 kVA and above would be equipped with additional metering class current transformers (CTs) and potential transformers (PTs) additional to requirements of Utilities so that periodic loss monitoring study may be carried out.
Voltage drop for feeders shall not exceed 2% at design load. Voltage drop for branch circuit shall not exceed 3% at design load.
Motors shall comply with the following:
BEE star rated DG sets shall be used in all compliant buildings. DG sets in buildings greater than 20,000 m2 BUA shall have:
Provided the building does not use DG sets for captive power generation ( no more than 15% of power requirement is being met by the use of DG sets), 3 star rated DG sets may be used for ECBC + and Super ECBC Buildings.
At Building mains, installed meters must be capable of monitoring Energy use (kWh), Energy Demand (kW) and total Power Factor on an hourly basis. For sub-meters installed at building services, the following metering requirements must be complied with:
Sub-metering requirements for different services are outlined in Table 7-2.
Table 7-2 Sub Metering: Minimum requirement for separation of electrical load | ||
---|---|---|
Building Contract Demand | ||
120 kVA to 250 kVA | Greater than 250 kVA | |
HVAC system and components | Required | Required |
Interior and Exterior Lighting | Not required | Required |
Domestic hot water | Not required | Required |
Plug loads | Not required | Required |
Renewable power source | Required | Required |
In addition to requirements stated above, for building types identified in Table 7-3, respective services must be sub-metered.
Table 7-3 Additional sub-metering requirements for specific building types | |
---|---|
Mandatory requirement of sub- metering of services for specific building types | |
Shopping Complex | Façade lighting |
Shopping Complex | Elevator, escalators, moving walks |
Business | Data centers |
Hospitality | Commercial kitchens |
For tenant based building, tenants must be provided with tap-off points to install electrical sub-meters.
All 3 phase shall maintain their power factor at the point of connection as follows:
The power cabling shall be sized so that the distribution losses do not exceed
Record of design calculation for the losses shall be maintained. Load calculation shall be calculated up to the panel level.
In all buildings, UPS shall meet or exceed the energy efficiency requirements listed in Table 7-4. Any Standards and Labeling program by BEE shall take precedence over requirements listed in this section.
Table 7-4 Energy Efficiency Requirements for UPS for ECBC, ECBC+, SuperECBC building | |
---|---|
UPS Size | Energy Efficiency Requirements at 100% Load |
kVA < 20 | 90.2% |
20 ≤ kVA ≤ 100 | 91.9% |
kVA > 100 | 93.8% |
All buildings shall have provisions for installation of renewable energy systems in the future on rooftops or the site.
Table 7-5 Minimum Renewable Contribution towards meeting Contract Demand in ECBC+ Building | |
---|---|
Building Type | Minimum Capacity to be Installed in REGZ |
All Building types except below | Minimum 2% of total Contract Demand |
Star Hotel > 20,000 m2 AGA Resort > 12,500 m2 AGA University > 20,000 m2 AGA Business > 20,000 m2 AGA |
Minimum 3% of total Contract Demand |
Table 7-6 Minimum Renewable Contribution towards meeting Contract Demand in SuperECBC Building | |
---|---|
Building Type | Minimum Capacity to be Installed in REGZ |
All Building types except below | Minimum 4% of total Contract Demand /td> |
Star Hotel > 20,000 m2 AGA Resort > 12,500 m2 University > 20,000 m2 AGA Business >20,000 m2 AGA |
Minimum 6% of total Contract Demand |
Minimum rating shall be displayed on the main electrical service panel. Space shall be reserved for the installation of a double pole circuit breaker for a future renewable electric installation.
The following shall be indicated in design and construction documents:
The Whole Building Performance Method is an alternative to the Prescriptive Method compliance path contained in §4 through §7 of this Code. It applies to all building types covered by the Code as mentioned in §2.5.
A building complies with the Code using the Whole Building Performance (WBP) Method, when the estimated EPI Ratio is equal to or less than 1, even though it may not comply with the specific provisions of the prescriptive requirements in §4 trough §7. The mandatory requirements of §4 through §7 (§4.2, §5.2, §6.2, and §7.2) shall be met when using the WBP Method.
Annual energy use for the purposes of the WBP Method shall be calculated in kilowatt-hours (kWh) of electricity use per year per unit area. Energy sources other than electricity that are used in the building shall be converted to kWh of electric energy at the rate of 0.75 kWh per megajoule.
Note: The annual energy use calculation as per the Whole Building Performance Method is not a prediction of the actual energy use of the building once it gets operational. Actual energy performance of a building depends on a number of factors like weather, occupant behaviour, equipment performance and maintenance, among others, which are not covered by this Code.
The WBP Method may be used for building permit applications that include less than the whole building; however, any design parameters that are not part of the building permit application shall be identical for both the Proposed Design and the Standard Design. Future improvements to the building shall comply with both the mandatory and prescriptive requirements of concurrent code.
Compliance shall be documented and compliance forms shall be submitted to the authority having jurisdiction. The information submitted shall include, at a minimum, the following:
All requirements of §4.2, §5.2, §6.2, and §7.2 shall be met. These sections contain the mandatory provisions of the Code and are prerequisites for demonstrating compliance using the WBP Method.
The simulation software shall be a computer-based program for the analysis of energy consumption in buildings and be approved by the authority having jurisdiction. The simulation program shall, at a minimum, have the ability to model the following:
In addition to the above, the simulation tool shall be able to produce hourly reports of energy use by energy source and shall have the capability to performing design load calculations to determine required HVAC equipment capacities, air, and water flow rates in accordance with §5 for both the proposed and Standard building designs.
The simulation program shall be tested according to ASHRAE Standard 140 Method of Test for the Evaluation of Building Energy Analysis Computer Programs (ANSI approved) and the results shall be furnished by the software provider.
The simulation program shall use hourly values of climatic data, such as temperature and humidity, from representative climatic data for the city in which the Proposed Design is to be located. For cities or urban regions with several climate data entries, and for locations where weather data are not available, the designer shall select available weather data that best represent the climate at the construction site.
The Proposed Design and Standard Design shall be calculated using the following:
The simulation model for calculating the Proposed Design and the Standard Design shall be developed in accordance with the requirements in Table 9-1. The Standard Design is based on the mandatory and prescriptive requirements of the ECBC compliant building. The Standard Design will be the same for all compliance levels (ECBC, ECBC+, Super ECBC).
Table 9-1 Modelling Requirements for Calculating Proposed and Standard Design | |
---|---|
1. Design Model | Proposed Design
|
Standard DesignThe Standard Design shall be developed by modifying the Proposed Design as described in this table. Unless specified in this table, all building systems and equipment shall be modeled identically in the Standard Design and Proposed Design. |
|
2. Space Use Classification |
Proposed DesignThe building type or space type classifications shall be chosen in accordance with §2.5. More than one building type category may be used in a building if it is a mixed-use facility. |
Standard DesignSame as Proposed Design. |
|
3. Schedules |
Proposed DesignOperational schedules (hourly variations in occupancy, lighting power, equipment power, HVAC equipment operation, etc.) suitable for the building and/or space type shall be modeled for showing compliance. Schedules must be modeled as per §9.6. In case a schedule for an occupancy type is missing in §9.6, appropriate schedule may be used. Temperature and humidity schedules and set points shall be identical in the Standard and Proposed Designs. Temperature control/thermostat throttling ranges shall also be modeled identically in both the Designs. |
Standard DesignSame as Proposed Design.Exception: Schedules may be allowed to differ between the Standard and proposed models wherever it is necessary to model nonstandard efficiency measures and/or measures which can be best approximated by a change in schedule. Measures that may warrant a change in operating schedules include but are not limited to automatic controls for lighting, natural ventilation, demand controlled ventilation systems, controls for service water heating load reduction. Schedule change is not allowed for manual controls under any category. This is subject to approval by the authority having jurisdiction. |
|
4. Building Envelope | Proposed DesignAll components of the building envelope in the Proposed Design shall be modeled as shown on architectural drawings or as installed for existing building envelopes. Exceptions: The following building elements are permitted to differ from architectural drawings.
|
Standard DesignThe Standard Design shall have identical conditioned floor area and identical exterior dimensions and orientations as the Proposed Design, except as noted in (a), (b), (c), (d) and (e) below.
|
|
5. Lighting |
Proposed DesignLighting power in the Proposed Design shall be determined as follows: Where a complete lighting system exists, the actual lighting power shall be used in the model. Where a lighting system has been designed, lighting power shall be determined in accordance with either §6.3.4. Where no lighting exists, or is specified, lighting power shall be determined in accordance with the §6.3.2 or §6.3.3 for the appropriate building type. Lighting system power shall include all lighting system components shown or provided for on plans (including lamps, ballasts, task fixtures, and furniture-mounted fixtures). Lighting power for parking garages, exterior spaces and building facades shall be modeled. Minimum Lighting controls, as per the ECBC requirements of §6.2.1, shall be modeled in the Proposed case. Automatic daylighting controls shall be modeled directly in the software or through schedule adjustments determined by a separate daylight analysis approved by the authority having jurisdiction. Other automatic lighting controls shall be modeled directly in the software by adjusting the lighting power as per Table 9-4. |
Standard DesignInterior lighting power in the Standard Design shall be determined using the same categorization procedure (building area or space function) and categories as the Proposed Design with lighting power set equal to the maximum allowed for the corresponding method and category in either §6.3.2 or §6.3.3. Power for fixtures not included in the lighting power density calculation shall be modeled identically in the Proposed Design and Standard Design. Lighting controls shall be as per the ECBC requirements of §6.2.1.Exterior lighting power in the standard design shall be set equal to the maximum allowed in §6.3.5 |
|
6. HVAC Thermal Zones |
Proposed DesignHVAC Zones Designed: Where HVAC zones are defined on design drawings, each HVAC zone shall be modeled as a separate thermal block. Exception: Identical zones (similar occupancy and usage, similar internal loads, similar set points and type of HVAC system, glazed exterior walls face the same orientation or vary by less than 45°) may be combined for simplicity. HVAC Zones Not Designed: Where HVAC zones are not defined on design drawings, HVAC zones shall be defined based on similar occupancy and usage, similar internal loads, similar set points and type of HVAC system, glazed exterior walls that face the same orientation or vary by less than 45° in combination with the following rules: Perimeter Core Zoning: Separate thermal block shall be modeled for perimeter and core spaces. Perimeter spaces are defined as spaces located within 5 meters of an exterior or semi exterior wall. Core spaces are defined as spaces located greater than 5 meters of an exterior or semi exterior wall. Separate thermal blocks shall be modeled for floors in contact with ground and for floors which have a ceiling/roof exposure to the ambient. |
Standard DesignSame as Proposed Design |
|
7. HVAC Systems |
Proposed DesignThe HVAC system type and all related performance parameters, such as equipment capacities and efficiencies, in the Proposed Design shall be determined as follows:
|
Standard DesignThe HVAC system type shall be as per Table 9-2 and related performance parameters for the Standard Design shall be determined from requirements of §9.4.2. Equipment performance shall meet the requirements of §5 for code compliant building. |
|
8. Service Hot Water |
Proposed DesignThe service hot water system type and all related performance parameters, such as equipment capacities and efficiencies, in the Proposed Design shall be determined as follows:
|
Standard DesignThe service water heating system shall be of the same type as the Proposed Design. For residential facilities, hotels and hospitals the Standard Design shall have a solar hot water system capable of meeting 20% of the hot water demand. Systems shall meet the efficiency requirements of §5.2.7.2. |
|
9. Miscellaneous Loads |
Proposed DesignReceptacle, motor, and process loads shall be modeled and estimated based on the building type or space type category. These loads shall be included in simulations of the building and shall be included when calculating the Standard Design and Proposed Design. All end-use load components within and associated with the building shall be modeled, unless specifically excluded by this Table, but not limited to, exhaust fans, parking garage ventilation fans, exterior building lighting, swimming pool heaters and pumps, elevators and escalators, refrigeration equipment, and cooking equipment. |
Standard DesignReceptacle, motor and process loads shall be modeled the same as the Proposed Design. |
|
10. Modelling Limitations to the Simulation Program |
Proposed DesignIf the simulation program cannot model a component or system included in the Proposed Design, one of the following methods shall be used with the approval of the authority having jurisdiction:
|
Standard DesignSame as Proposed Design. |
Notes:
1. Buildings of the listed occupancy types or spaces in Mixed-use Buildings with the listed occupancy
types.
2. Where attributes make a building eligible for more than one system type; use the predominant
condition to determine the Standard Design system type provided the non-predominant conditions
apply to less than 1,000m2of conditioned floor area. Use additional system type for non-predominant
conditions if those conditions apply to more than 1,000 m2 of conditioned floor area.
Use additional system type for any space which has a substantial difference in peak loads and/or
operational hours compared to the predominant space type. Such spaces may include but are not
limited to computer/server rooms, retail areas in residential, or office buildings.
3. One AHU per floor at a minimum.
Table 9-2 HVAC Systems Map for Standard Design | ||||
---|---|---|---|---|
Hotel/Motel, Hospital Patient Rooms, Hotel Guest Rooms, Resorts, Villas, Sleeping Quarters in Mixed-use Buildings, Schools, Classrooms/Lecture Rooms1 | Buildings with Less than or Equal to 12,500 m2 of Conditioned Area | Buildings with More than 12,500m2 of Conditioned Area | Data Centre/Server/Computer Rooms | |
Name | System A | System B | System C | System D |
System Type2 | Split AC | VRF : Variable Refrigerant Flow | VAV: Central cooling plant with variable volume AHU3 | Computer Room air conditioners |
Fan Control | Constant Volume | Constant volume | Variable volume | Constant volume |
Cooling Type | Direct expansion with air cooled condenser | Direct expansion with air cooled condenser | Chilled Water with water cooled condenser | Direct expansion with air cooled condenser |
Heating Type | 1. Heat Pump: Where no heating system has been specified or where an electric heating
system has been specified in the Proposed Design 2. Fossil Fuel Boiler, Fossil/Electric Hybrid: Where a heating system exists and a fossil fuel hot water boiler has been specified in the Proposed Design |
1. Heat Pump: Where no heating system has been specified or where an electric heating
system has been specified in the Proposed Design 2. Fossil Fuel Boiler, Fossil/Electric Hybrid: Where a heating system exists and a fossil fuel hot water boiler has been specified in the Proposed Design |
1. Electric resistance: Where no heating system has been specified or where an electric
heating system has been specified in the Proposed Design 2. Fossil Fuel Boiler, Fossil/Electric Hybrid: Where a heating system exists and a fossil fuel hot water boiler has been specified in the Proposed Design |
NA |
Notes:
|
Table 9-3 Power Adjustment Factors for Automatic Lighting Controls | ||
---|---|---|
Automatic Control Device | Daytime occupancy and area <300 m3 | All Others |
Programmable Timing Control | 10% | 0% |
Occupancy Sensor | 10% | 10% |
Occupancy Sensor and Programmable Timing Control | 15% | 10% |
The HVAC system type and related performance parameters for the Standard Design shall be determined from Table 9-2 and the following rules:
Minimum outdoor air rates shall be identical for both the Standard Design and Proposed Design, except
Supply and return fans shall operate continuously whenever the spaces are occupied and shall be cycled to meet heating and cooling loads during unoccupied hours.
Design airflow rates for the Standard Design shall be sized based on a supply air to room air temperature difference of 11 °C for cooling and 18°C for heating. The Proposed Design airflow rates shall be as per design.
Airside economizers shall be modeled in the Standard Design as per the requirements of §5.3.5. Exception to §9.4.2.5: Airside economizer shall not be modeled for Standard Design HVAC System Type A.
Energy recovery shall be modeled in the Standard Design as per the requirements of §5.3.
Chilled water design supply temperature shall be modeled at 6.7° C and return temperature at 13.3° C.
Only electric chillers shall be modeled in the Standard Design for System C. Chillers shall meet the minimum efficiency requirements indicated in Table 9-4 and Table 9-5. Chillers in the Standard Design shall be selected as per Table 9-6 below:
Table 9-4 Minimum Energy Efficiency Requirements for water cooled Chillers | ||||
---|---|---|---|---|
ECBC+ Building | SuperECBC Building | |||
Chiller Capacity (kWr) | COP | IPLV | COP | IPLV |
< 260 | 5.2 | 6.9 | 5.8 | 7.1 |
≥ 260 & < 530 | 5.8 | 7.1 | 6.0 | 7.9 |
≥ 530 & < 1,050 | 5.8 | 7.5 | 6.3 | 8.4 |
≥ 1,050 && < 1,580 | 6.2 | 8.1 | 6.5 | 8.8 |
≥ 1,580 | 6.5 | 8.9 | 6.7 | 9.1 |
Table 9-5 Minimum Energy Efficiency Requirements for air cooled Chillers | ||||
---|---|---|---|---|
ECBC+ Building | SuperECBC Building | |||
Chiller Capacity (kWr) | COP | IPLV | COP/IPLV | |
< 260 | 3.0 | 4.0 | NA | |
≥ 260 | 3.2 | 5.0 | NA |
Table 9-6 Types and Number of Chillers for Modeling Requirements for Calculating Proposed and Standard Design | |
---|---|
Peak Building Cooling Load (kWr) | Chiller Type |
< 1,055 | 1 Water Cooled Screw Chiller |
1,055 to 2,110 | 2 Water Cooled Screw Chillers equally sized |
> 2,110 | 2 or more Water Cooled Centrifugal Chillers, equally sized such that no Chiller is greater than 2,813 kWr |
Exception to §9.4.2.8: Air cooled chillers are allowed to be modeled in the Standard Design if the Proposed Design has air cooled chillers. If the proposed building has a mix of air and water cooled chillers, then the Standard Design shall be modeled with a mix of air and water cooled chillers in the same proportion as in the Proposed Design.
Chilled and condenser water pumps for the Standard Design shall be modeled as per power and efficiency limits specified in Table 5-16. Standard Design chilled water pumps shall be modeled as primary-secondary with variable secondary flow.
Standard Design cooling tower shall be modeled as an open circuit axial flow tower with power and efficiency as per §5.3.3. The fans shall be modeled as two speed. Condenser water design supply temperature shall be 29.4°C or 5.6°C approach to wet bulb temperature, whichever is lower, with a design temperature rise of 5.6°C.
Standard Design boilers shall be modeled as natural draft boilers and shall use the same fuel as the Proposed Design. Boiler efficiency shall be modeled as per Table 5-6.
Hot water design supply temperature shall be modeled at 82°C and return temperature at 54°C.
The Standard Design hot water pumps shall be modeled with a minimum efficiency of 70% and a pump power of 300 W/l-s-1. Standard Design hot water pumps shall be modeled as primary-secondary with variable secondary flow.
All district cooling plants shall be assumed to be on grid electricity, unless otherwise specified and supported through pertinent documents. New district plants shall comply with the mandatory requirements of ECBC irrespective of who owns and/or operates the district plant.
Projects may choose either option A or option B given below for modelling campus/district cooling systems. Option A The cooling source shall be modeled as purchased chilled water in both the Standard Design and Proposed Design. For the Standard Design, Table 9-2, shall be modified as follows:
The chilled water/thermal energy consumption
simulated by the software shall be converted to units of kWh and added to the overall building
energy consumption. The following conversion factors shall be used to convert chilled
water/thermal energy consumption to units of kWh.
1 ton hour = 0.85 kWh
1 MBtu = 1,000,000 Btu = 293 kWh
Option B
The Standard Design shall be modeled as per Table 9-2. For the
Proposed Design, model a virtual onsite chilled water plant with Chiller, Pumps and cooling
towers modeled at minimum efficiency levels as per §9.4.2.7 to §9.4.2.10. Airside/low side
capacities shall be modeled as per design and the plant capacities shall be auto-sized by the
software.
For buildings to qualify as ECBC+ and SuperECBC Buildings, the WBP Method shall be followed for the Standard Design as detailed above. The Proposed Design for ECBC+ and SuperECBC Buildings shall meet the mandatory provisions of §4.2, §5.2, §6.2, and §7.2.
The EPI Ratio for ECBC+ and SuperECBC Buildings shall be equal to or less than the EPI Ratios listed under the applicable climate zone in Table 9-5 through Table 9-7 of §9.11.
Table 9-7 Maximum Allowed EPI Ratios for Building in Composite Climate | |||
---|---|---|---|
Building Type | Composite | ||
ECBC | ECBC+ | SuperECBC | |
No Star Hotel, Star Hotel | 1 | 0.91 | 0.81 |
Resort | 1 | 0.88 | 0.76 |
Hospital | 1 | 0.85 | 0.77 |
Outpatient | 1 | 0.85 | 0.75 |
Assembly | 1 | 0.86 | 0.77 |
Office(Regular Use) | 1 | 0.86 | 0.78 |
Office(24 Hours) | 1 | 0.88 | 0.76 |
Schools and University | 1 | 0.77 | 0.66 |
Open Gallery Mall | 1 | 0.85 | 0.76 |
Shopping Mall | 1 | 0.86 | 0.74 |
Supermarket | 1 | 0.81 | 0.7 |
Strip retail | 1 | 0.82 | 0.68 |
Table 9-8 Maximum Allowed EPI Ratios for Building in Hot and Dry Climate | |||
---|---|---|---|
Building Type | Hot and Dry | ||
ECBC | ECBC+ | SuperECBC | |
No Star Hotel, Star Hotel | 1 | 0.9 | 0.81 |
Resort | 1 | 0.88 | 0.76 |
Hospital | 1 | 0.84 | 0.76 |
Outpatient | 1 | 0.85 | 0.75 |
Assembly | 1 | 0.86 | 0.78 |
Office(Regular Use) | 1 | 0.86 | 0.78 |
Office(24 Hours) | 1 | 0.88 | 0.76 |
Schools and University | 1 | 0.77 | 0.66 |
Open Gallery Mall | 1 | 0.85 | 0.77 |
Shopping Mall | 1 | 0.84 | 0.72 |
Supermarket | 1 | 0.73 | 0.69 |
Strip retail | 1 | 0.82 | 0.68 |
Table 9-9 Maximum Allowed EPI Ratios for Building in Temperate Climate | |||
---|---|---|---|
Building Type | Temperate | ||
ECBC | ECBC+ | SuperECBC | |
No Star Hotel, Star Hotel | 1 | 0.9 | 0.8 |
Resort | 1 | 0.88 | 0.75 |
Hospital | 1 | 0.82 | 0.73 |
Outpatient | 1 | 0.85 | 0.75 |
Assembly | 1 | 0.85 | 0.76 |
Office(Regular Use) | 1 | 0.85 | 0.75 |
Office(24 Hours) | 1 | 0.87 | 0.74 |
Schools and University | 1 | 0.77 | 0.66 |
Open Gallery Mall | 1 | 0.83 | 0.74 |
Shopping Mall | 1 | 0.84 | 0.71 |
Supermarket | 1 | 0.81 | 0.69 |
Strip retail | 1 | 0.81 | 0.67 |
Table 9-10 Maximum Allowed EPI Ratios for Building in Warm and Humid Climate | |||
---|---|---|---|
Building Type | Warm and Humid | ||
ECBC | ECBC+ | SuperECBC | |
No Star Hotel, Star Hotel | 1 | 0.91 | 0.81 |
Resort | 1 | 0.88 | 0.75 |
Hospital | 1 | 0.86 | 0.77 |
Outpatient | 1 | 0.86 | 0.76 |
Assembly | 1 | 0.88 | 0.8 |
Office(Regular Use) | 1 | 0.86 | 0.76 |
Office(24 Hours) | 1 | 0.88 | 0.76 |
Schools and University | 1 | 0.77 | 0.66 |
Open Gallery Mall | 1 | 0.86 | 0.77 |
Shopping Mall | 1 | 0.85 | 0.72 |
Supermarket | 1 | 0.82 | 0.7 |
Strip retail | 1 | 0.83 | 0.68 |
Table 9-11 Maximum Allowed EPI Ratios for Building in Cold Climate | |||
---|---|---|---|
Building Type | Cold | ||
ECBC | ECBC+ | SuperECBC | |
No Star Hotel, Star Hotel | 1 | 0.91 | 0.82 |
Resort | 1 | 0.88 | 0.75 |
Hospital | 1 | 0.88 | 0.8 |
Outpatient | 1 | 0.85 | 0.75 |
Assembly | 1 | 0.87 | 0.81 |
Office(Regular Use) | 1 | 0.88 | 0.8 |
Office(24 Hours) | 1 | 0.87 | 0.75 |
Schools and University | 1 | 0.85 | 0.73 |
Open Gallery Mall | 1 | 0.82 | 0.73 |
Shopping Mall | 1 | 0.96 | 0.93 |
Supermarket | 1 | 0.8 | 0.68 |
Strip retail | 1 | 0.8 | 0.66 |