boil off rate for blichmann boilermaker 15gal

[mlyday]

Ive been using a 7 gallon aluminum pot for my 5 gallon brews, but for christmas I got a 15 gallon boilermaker. Until I can upgrade the mashtun, im stuck doing 5 gallon batches. What kind of boil off rate am I likely to see.

 

[Seven]

It will depend on your climate and many other factors. Best thing to do is do a test boil with water so you can measure your boil off rate.