**Query**

A project has residential and commercial functions. Since the benchmark EPIs differ for both types of functions, how will the EPI benchmark be chosen?

In the GRIHA v2015 manual, Appendix 5 weighted average method is recommended, but how do we calculate the percentage savings and which EPI benchmark should be considered for calculation.

**Solution**

The sample calculation is attached herewith for calculating GRIHA Benchmark EPI for Mixed used building typology. (Attachment included).