Originally Posted by Revvy
If you're doing extract, then yes....if you're going allgrain, then no...you need to know the boiloff rate of your bayou and figure it in...
Why don't you run a test with plain water before you actually start working woth your wort...Bring 6 gallons up to boil and time it til you get 5 1/2...Then cool the water and use it for either your strike/sparge water or if extract use it for your wort and topp off water...That way you'll know the boiloff rate of your rig...
I don't get why you say that you can add water to extract, but not AG?
I'd also mention that boil-off is relative. There are a lot of variables that affect it.