I do BIAB, usually 5 gal batches. So I am going from mash temp 154 +- 4 to boiling. I keep the lid on when raising the temp to boiling and it takes about 25 - 30 minutes. It took a little longer for the 10 gal, around 40 minutes or so. Yes, I get a vigorous boil, I crank it up to 3500 to raise...