Page 22 - GRIHA Manual Volume IV - Introduction to National Rating System

Building planning and construction 13

Following is a sample calculation using the calculator available on the GRIHA online evaluation tool.

Table 2 (Data sheet) Estimation of building water use
In case of kitchen and lavatory faucets, please specify the number of usage and duration of a single use below.
Kitchen No. of usage(n) 3.00
Duration of a single usage 0.50
Lavatory No. of usage(n) 2.00
Duration of a single usage 0.50
No. of uses* (In case of water closets and urinals) = number of usage per person/per day
No. of uses* (In case of faucets) = duration of use * number of usage per person/per day
Please specify total building occupancy, female occupants, male occupants
Female 132
Male 132
Building occupancy (x) 264.00
Working days 365.00
Present design case
Fixtures
Water closets (solids) No. of ixtures 135.00
Flow rates (lpf/lpm) 6.00
Type of building Residential
No. of uses * 1.00
Water consumption (l) 1584.00
Kitchen faucets No. of ixtures 44.00
Flow rates (lpf/lpm) 6.30
Type of building Residential
No. of uses * 3.00
Water consumption (l) 4989.60
Water closets (liquid) No. of ixtures 135.00
Flow rates (lpf/lpm) 3.00
Type of building Residential
No. of uses * 5.00
Water consumption (l) 1980.00
Urinals / Sensor based urinals / No. of ixtures 2.00
Waterless urinals
Flow rates (lpf/lpm) 0.00
Type of Building Residential
No. of uses * 5.00
Water consumption (l) 0.00