Originally Posted by Hermit
Boil off from this method is no different than any other method of mashing. In the end, you measure your boil off rate.
This. BIAB is no different. If you haven't measured the boiloff rate of your equipment, 10%/hour is a good rule of thumb for a roiling boil.
"I can't believe how many people think Air Lock is pronounced Hydrometer." -BigKahuna
"If you gave me a beer with placenta in it without telling me I would kick you in the nuts." -ODaniel
"We be in a big hurry for dope beer with much alcamahol and flavor, quality, balance, and aroma don't matter. We just wantz to be druck, u know?" -Yooper