Page 86 - GRIHA Manual Volume I - Introduction to National Rating System
P. 86
Criteria for GRIHA rating 73
13.2.2 Perform a sun path analysis for each exposed fenestration or use shading norms (prescribed
in the Table 9 & 10 of Handbook on functional requirements of buildings other than
industrial buildings) to demonstrate the optimum shading requirement.
13.2.3 Detail Window & Skylight schedule of the proposed building.
13.2.4 Submit the detail calculation in the prescribed format for WWR and/ or format for SRR; to
demonstrate the percentage of vertical fenestration on gross wall area and/ or percentage
of horizontal fenestration on gross roof area. (Refer table-13.3.1 & 13.3.2).
13.2.5 Provide the calculated SHGC in the prescribed format for window details (Table 13.4) to
support that all proposed fenestration meet the SHGC requirement as prescribed in ECBC
2007. (Use the online SHGC calculator to calculate the eff ective SHGC for each fenestration
accounting for Glazing and Overhangs and/ or Side fi ns).
13.2.6 Submit the calculated daylighted area in the following format (table-13.5.1 & 13.5.2) to
show that the total daylighted area is > 25% of the living area of the proposed building
(as specifi ed in table-13.2) and provide the calculated DF in the format for daylight factor
calculation (table 13.5.3) to demonstrate that all the living areas compliance with IS: 2440-
1975.
13.2.7 Lighting level simulation result outputs for all areas to demonstrate lighting level compliance
with BIS (Refer table-13.6).
13.2.8 Provide certifi cates from architect/service consultant on compliance with clause 13.1.4.
13.2.9 Provide certifi cates from architect/service consultant on compliance with clause 13.1.5.
13.3 Appraisal (Maximum points - 8 and Mandatory points- 6)
13.3.1 By adopting appropriate climate responsive building design with the limited WWR and/
or SRR as mentioned above and all the fenestrations meet the SHGC requirement of ECBC-
2007, as per clause 13.2.3 to 13.2.5 (2 points - mandatory).
13.3.2 Minimum of 25% of the living area (as mentioned above) should be daylighted and
adequate level of daylight is provided as prescribed by IS code as per clause 13.2.6 & 13.2.8
(2 points - mandatory) and/ or
P If the total daylighted area > 50% of total living area (1 point - additional) and/ or
P If the total daylighted area > 75% of total living area (1 point - additional).
13.2.3 Over-design of lighting system is avoided as per clause 13.2.7 and 13.2.9 (2 points -
mandatory).
Figure 5 Downdraft cooling system
13.2.2 Perform a sun path analysis for each exposed fenestration or use shading norms (prescribed
in the Table 9 & 10 of Handbook on functional requirements of buildings other than
industrial buildings) to demonstrate the optimum shading requirement.
13.2.3 Detail Window & Skylight schedule of the proposed building.
13.2.4 Submit the detail calculation in the prescribed format for WWR and/ or format for SRR; to
demonstrate the percentage of vertical fenestration on gross wall area and/ or percentage
of horizontal fenestration on gross roof area. (Refer table-13.3.1 & 13.3.2).
13.2.5 Provide the calculated SHGC in the prescribed format for window details (Table 13.4) to
support that all proposed fenestration meet the SHGC requirement as prescribed in ECBC
2007. (Use the online SHGC calculator to calculate the eff ective SHGC for each fenestration
accounting for Glazing and Overhangs and/ or Side fi ns).
13.2.6 Submit the calculated daylighted area in the following format (table-13.5.1 & 13.5.2) to
show that the total daylighted area is > 25% of the living area of the proposed building
(as specifi ed in table-13.2) and provide the calculated DF in the format for daylight factor
calculation (table 13.5.3) to demonstrate that all the living areas compliance with IS: 2440-
1975.
13.2.7 Lighting level simulation result outputs for all areas to demonstrate lighting level compliance
with BIS (Refer table-13.6).
13.2.8 Provide certifi cates from architect/service consultant on compliance with clause 13.1.4.
13.2.9 Provide certifi cates from architect/service consultant on compliance with clause 13.1.5.
13.3 Appraisal (Maximum points - 8 and Mandatory points- 6)
13.3.1 By adopting appropriate climate responsive building design with the limited WWR and/
or SRR as mentioned above and all the fenestrations meet the SHGC requirement of ECBC-
2007, as per clause 13.2.3 to 13.2.5 (2 points - mandatory).
13.3.2 Minimum of 25% of the living area (as mentioned above) should be daylighted and
adequate level of daylight is provided as prescribed by IS code as per clause 13.2.6 & 13.2.8
(2 points - mandatory) and/ or
P If the total daylighted area > 50% of total living area (1 point - additional) and/ or
P If the total daylighted area > 75% of total living area (1 point - additional).
13.2.3 Over-design of lighting system is avoided as per clause 13.2.7 and 13.2.9 (2 points -
mandatory).
Figure 5 Downdraft cooling system
