Is solar water heating system mandatory under GRIHA version 2015?
GRIHA Version 2015 does not have a dedicated criterion for solar thermal systems like the previous version. In the new version, renewable energy is consolidated under criterion 9. The project has to meet the mandatory requirement of the criterion based on their typology. GRIHA has not defined the approach to do the same. So for example, a daytime commercial project can meet the 2.5% requirement through a mix of SPV and hot water systems OR through only SPV. Please note that energy offset from the solar thermal system will factor in the calculation