Calculate reclaimed water in "Indoor Water Use Reduction Calculator"

Hi Hanh, When using alternative or potable water source to comply with this credit, you need to provide the alternative water system design drawings, a narrative describing the alternative source, and calculations confirming the alternative water quantity. Include climate data and storage size/use calculations as well.  Once you calculate your annual design case water consumption, non-potable/alternative water use is subtracted using the equation in the reference guide (See: Step by Step Guidance). By this language, it doesn't look like it is included with the calculator, but as a separate calculation narrative. I hope that helps!