Page 66 - GRIHA Manual Volume I - Introduction to National Rating System
P. 66
Case studies of GRIHA registered/rated buildings 53
Figure 9 Tree preservation Figure 10 Sedimentation tank Figure 11 Air pollution control
2.3.2 Water conservation
There are two ways of conserving water during post construction and after the building is occupied.
One is landscape water demand and second is building water demand. In this building, reduction
in landscape water demand by more than 50% was achieved by use of minimum grass/lawn area,
maximum green area under native vegetation and native trees. Low fl ow plumbing fi xtures are used
in the building resulting in reduced water consumption from GRIHA’s benchmark by 62%.Waste
water is treated and reused for irrigation. Rain water harvesting system has been designed.
2.3.3 Conservation and effi cient utilization of resource: energy
Maximum points weightage in GRIHA is given for energy conservation. The criteria and commitment
for energy conservation could be divided into three parts.
a. Energy: end use
b. Energy: embodied and construction
c. Energy: Renewable energy utilization
Energy: end use
The objective is to reduce annual energy consumption of the building. This has been achieved in
CESE building at IIT, Kanpur by adopting following strategies.
1. Architectural design optimized as per the climate of Kanpur, sun path analysis, predominant
wind direction, and existing vegetation.
2. Optimized building envelope to comply with the Energy Conservation Building Code, to
reduce cooling load in the air conditioned spaces and to achieve thermal comfort in the non air
conditioned areas.
3. Effi cient window design by selecting effi cient glazing, external shading to reduce solar heat
gain but at the same time achieve glare free natural daylight inside all the laboratory spaces of
the building.
4. Roof shaded by bamboo trellis and green cover to reduce external solar heat gains from
the roof.
Figure 9 Tree preservation Figure 10 Sedimentation tank Figure 11 Air pollution control
2.3.2 Water conservation
There are two ways of conserving water during post construction and after the building is occupied.
One is landscape water demand and second is building water demand. In this building, reduction
in landscape water demand by more than 50% was achieved by use of minimum grass/lawn area,
maximum green area under native vegetation and native trees. Low fl ow plumbing fi xtures are used
in the building resulting in reduced water consumption from GRIHA’s benchmark by 62%.Waste
water is treated and reused for irrigation. Rain water harvesting system has been designed.
2.3.3 Conservation and effi cient utilization of resource: energy
Maximum points weightage in GRIHA is given for energy conservation. The criteria and commitment
for energy conservation could be divided into three parts.
a. Energy: end use
b. Energy: embodied and construction
c. Energy: Renewable energy utilization
Energy: end use
The objective is to reduce annual energy consumption of the building. This has been achieved in
CESE building at IIT, Kanpur by adopting following strategies.
1. Architectural design optimized as per the climate of Kanpur, sun path analysis, predominant
wind direction, and existing vegetation.
2. Optimized building envelope to comply with the Energy Conservation Building Code, to
reduce cooling load in the air conditioned spaces and to achieve thermal comfort in the non air
conditioned areas.
3. Effi cient window design by selecting effi cient glazing, external shading to reduce solar heat
gain but at the same time achieve glare free natural daylight inside all the laboratory spaces of
the building.
4. Roof shaded by bamboo trellis and green cover to reduce external solar heat gains from
the roof.
