« on: November 05, 2011, 07:18:48 AM »
I am sure there is no clear cut answer. I live in the Denver area at about 6,000 ft in elevation so I think our boil off would be even higher. I use beer smith, but yesterday I brewed a 5 gallon batch of All grain and used 15% as evaporation rate, 3/4 gallon as loss to trube and 4% as cooling loss which are settings I have used previously. Beer Smith said I should have a pre-boil volume of 7.01 gallons with the above variables, but I was left with just a little over 4 gallons of wort in my fermentor which is the first time I was that far off.
Two things were different with this batch: I used a Chillus Convolutus wort chiller from Morebeer instead of an immersion chiller and Blichmann's hopblocker. Both pieces of equipment worked great. Does anyone have any insight as to why I might have lost 3 gallons of wort with a 60 minute boil? Does the vigor of the boil matter much? Thanks very much.