Originally Posted by davis119
That depends on your system...... how much you evap. Per hour.
I loose almost 1.5gl per/h. So id have more pre boil than another guy
K, thanks. I only brewed 3 batches with my new system so I still don't have a good feel for the evaporation rate per hour. Guess I'll start out with about 6.75 gallons this time.