It'll significantly help avoid boil-overs too...
Keep in mind that for an extract brew it has already been boiled so that the DMS should be gone. I'd boil with the lid off anyway just to ensure that any more that is generated is driven off, but I don't think it's as critical as with AG.
It'll significantly help avoid boil-overs too...
Lid stays on til the boil starts. Then it comes off for the duration.
But remember that heat is what causes wort to produce DMS. Taht's why rapidly cooling the wort below 150F is so important. 150-212F is where DMS production happens.
So when you boil the extract, it could produce DMS again, especially if the extract is based heavily on Pilsner malt.
I brew outside, or if its raining or windy, in my garage with the door open, so i leave the lid on till i get to boiling then put the lid half on half off to let out the nasties but help prevent anything from falling in, leaves pine needles, bugs etc... just my 2 pesos
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