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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > boiling my wort
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Old 07-24-2012, 05:34 PM   #1
Benny1982
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Default boiling my wort

do i need to keep my brew kettle open or covered when boiling?

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Benny

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Old 07-24-2012, 05:44 PM   #2
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Open, you want some boil off to reach your desired batch size, assuming you calculated for that. Also, leaving the lid off allows for the release of dimethyl sulfides, DMS, that can cause off flavors.

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Old 07-24-2012, 05:46 PM   #3
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If you're having trouble keeping a boil going you can partially cap it. Even covering maybe a third of the opening can increase your boil and not make much of a difference in DMS or boil off.

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Old 07-24-2012, 05:49 PM   #4
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Quote:
Originally Posted by cmybeer View Post
If you're having trouble keeping a boil going you can partially cap it. Even covering maybe a third of the opening can increase your boil and not make much of a difference in DMS or boil off.
I have done this method because I am on a crappy apartment stove so I needed to keep in extra heat when possible, but you don't want to cover it the whole way.
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Old 07-24-2012, 05:51 PM   #5
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I cover it until it starts boiling, electric glass top take a little while for it to reach boiling point with that much liquid.

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Old 07-24-2012, 05:55 PM   #6
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Full boil? Partial boil? Extract? All-Grain?

Extract has most of the DMS boiled off, so a bigger concern is boil over. I'd you are doing full boil to want to make sure you evaporate enough water.

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