I'm trying to keep better track of numbers now as I try to get into designing my own recipies and become a better brewer as a whole. I plan to use Promash to help me do this. One bit of information that it wants for the "water needed" calculator is the evaporation rate (of the boil) in % per hour.

Saturday I brewed a porter, and collected 7.5 gal of wort pre-boil from both runnings(batch sparge) and ended up with 6 gal left after the 60 min. boil. I'm guessing that this is a 20% loss. Is that correct? I haven't really haven't had work with percentages in awhile, but I figured that 6/7.5=0.8. Which means that 6 gallons is 80% of 7.5 gallons, or a 20% loss from the original volume. Is that right?
Forum: Homebrewing | Author: Mortician607
Posted: December 29, 2008, 10:38 am

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