Page 15 - GRIHA Manual Volume III - Introduction to National Rating System
P. 15
8 GRIHA Manual: Volume 3
Graphical representation of Table 1
Figure 3 Incident solar radiation in India during summer
Figure 4 Incident solar radiation in India during winter
The total insolation can be calculated for all possible orientations of the building for these extreme
days of summer and winter for different parts of the country. Also, the orientation of the proposed
building and location of openings can be planned accordingly.
Conclusion: The optimum orientation for buildings in India is with the longer façades facing north
and south to avoid summer heat gain, and allow maximum winter radiation. The basic objective is
to minimize the building exposure along east and west.
Note: In case of non air-conditioned buildings, other climatic factors such as temperature, relative humidity, and prevailing
wind also play major roles in optimizing the orientation of the building.
Graphical representation of Table 1
Figure 3 Incident solar radiation in India during summer
Figure 4 Incident solar radiation in India during winter
The total insolation can be calculated for all possible orientations of the building for these extreme
days of summer and winter for different parts of the country. Also, the orientation of the proposed
building and location of openings can be planned accordingly.
Conclusion: The optimum orientation for buildings in India is with the longer façades facing north
and south to avoid summer heat gain, and allow maximum winter radiation. The basic objective is
to minimize the building exposure along east and west.
Note: In case of non air-conditioned buildings, other climatic factors such as temperature, relative humidity, and prevailing
wind also play major roles in optimizing the orientation of the building.
