I am trying to get my process down and one thing that continues to have a question mark over it is the sparge temps. My software has a single default for all mash profiles, but you can configure it a million ways. It seems from looking around, for fly sparging most people stick with a steady 175F, but for batch sparging I've been told everything from 165F to 200F. Knowledge of heat exchange would tell me that every batch could be different based on mash temp & heat loss over mash, volume, grain weight etc... So how do most of you arrive at a sparge temp? Do you fly sparge or batch sparge and do you always use the same temp (if so what temp?) or do you calculate it each time? Is there some sort of simple calculator that helps?
