Page 75 - GRIHA Manual Volume III - Introduction to National Rating System
P. 75
68 GRIHA Manual: Volume 3
DB 23°C–26° C DB 21°C–23°C
4 Departmental stores
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24°C
5 Hotel guest rooms
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24°C
6 Class rooms
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24° C
7 Auditoriums
RH 50%–60% RH not less than 40%
8 Recovery rooms DB 24°C–26°C
RH 45%–55%
9 Patient rooms DB 24°C–26°C
RH 45%–55%
10 Operation theatres DB 17°C–27°C
RH 45%–55%
Source: Clause 4.4.3 of NBC 2005
14.1.3 Perform hourly calculations to show that thermal comfort conditions in
non-airconditioned areas (living spaces*) are as specified in Table 14.2 are met for 90%
of all occupied hours for buildings in composite, moderate, and hot and dry climate,
and for 60% of all occupied hours for buildings in warm and humid climate.
Table-14.2 Thermal comfort conditions for non-AC buildings
Temperature less than 33 ºC
Relative humidity less than 70%
14.1.4 Show that the predicted energy performance of energy systems in a building, under
a specified category, is less than the benchmarked energy performance figure. The
energy systems include air-conditioners, indoor lighting systems, water heaters, air
heaters, and air circulation devices.
14.1.5 The annual predicted energy performance of energy systems in a fully air-conditioned
building (for day and 24 hour use) should not exceed the benchmarked energy
performance figures mentioned in table 14.3.
Table 14.3 Benchmark energy performance index (EPI) for air-conditioned buildings
Benchmark EPI for air-conditioned commercial buildings
Climate Classiication EPI (kWh/ m2/year) EPI (kWh/ m2/year)
Daytime occupancy 24-hour occupancy
5 days a week 7 days a week
Moderate 120 350
Composite/warm and humid/hot and dry 140 450
Benchmark EPI for air-conditioned residential buildings
Composite/warm and humid/hot and dry 200
* Non-airconditioned spaces are classiied into living and non living spaces. The examples of non living spaces are parking area, boiler room,
mechanical room, generator room, etc.
DB 23°C–26° C DB 21°C–23°C
4 Departmental stores
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24°C
5 Hotel guest rooms
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24°C
6 Class rooms
RH 50%–60% RH not less than 40%
DB 23°C–26°C DB 23°C–24° C
7 Auditoriums
RH 50%–60% RH not less than 40%
8 Recovery rooms DB 24°C–26°C
RH 45%–55%
9 Patient rooms DB 24°C–26°C
RH 45%–55%
10 Operation theatres DB 17°C–27°C
RH 45%–55%
Source: Clause 4.4.3 of NBC 2005
14.1.3 Perform hourly calculations to show that thermal comfort conditions in
non-airconditioned areas (living spaces*) are as specified in Table 14.2 are met for 90%
of all occupied hours for buildings in composite, moderate, and hot and dry climate,
and for 60% of all occupied hours for buildings in warm and humid climate.
Table-14.2 Thermal comfort conditions for non-AC buildings
Temperature less than 33 ºC
Relative humidity less than 70%
14.1.4 Show that the predicted energy performance of energy systems in a building, under
a specified category, is less than the benchmarked energy performance figure. The
energy systems include air-conditioners, indoor lighting systems, water heaters, air
heaters, and air circulation devices.
14.1.5 The annual predicted energy performance of energy systems in a fully air-conditioned
building (for day and 24 hour use) should not exceed the benchmarked energy
performance figures mentioned in table 14.3.
Table 14.3 Benchmark energy performance index (EPI) for air-conditioned buildings
Benchmark EPI for air-conditioned commercial buildings
Climate Classiication EPI (kWh/ m2/year) EPI (kWh/ m2/year)
Daytime occupancy 24-hour occupancy
5 days a week 7 days a week
Moderate 120 350
Composite/warm and humid/hot and dry 140 450
Benchmark EPI for air-conditioned residential buildings
Composite/warm and humid/hot and dry 200
* Non-airconditioned spaces are classiied into living and non living spaces. The examples of non living spaces are parking area, boiler room,
mechanical room, generator room, etc.
