WEpc115 calculator

I have asked the Mechnical Engineer to estimate HVAC water usage, such as cooling tower water usage. There doesn't seem to be a set standard for estimating this - it seems they will often go to the manufacture for the information and based on the system sizing & loads for the project make some estimated calculations. I have not yet tried submitting this to the GBCI. As for process loads, I think it depends on what types of process loads you have - I have a couple projects with car washes or pressure washers for buses and I have asked for water data from sister facilities or done reserach into the types of car washes, etc. to find average estimates for those, and gathered information from the client for how often the washers are used.