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Old 04-02-2006, 07:58 PM   #1
mysterio
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I boiled my last batch with the lid on so as not to lose a gallon through evaporation... However I just noticed the John Palmer website said this will give nasty off-flavours. Do you think this will be noticable or am I being paranoid?
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Old 04-02-2006, 08:12 PM   #2
chillHayze
 
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when I boil w/the lid I get humungous overflow. I don't think the evaporation is anything to worry about as long as you boil at least a gallon and a half. You could add a little water every few minuites if there is concern or your boil is small to begin with.
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Old 04-02-2006, 09:59 PM   #3
casebrew
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There's at leat 3 reasons to boil:

1) reduce volume

2) enhance flavor profile by boiling the hops and malt together

3) boil off some stuff you don't want in your beer.

Soo, keeping the lid on will have effects...
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Old 04-02-2006, 10:49 PM   #4
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If you keep the lid on, you can't safely maintain a rolling boil, which is really neccessary to dissolve the bittering acids. All you are losing is water and junk you don't want in the beer. You can add water if you need to in the fermenter.
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Old 04-03-2006, 12:09 AM   #5
budbo
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What I generally do is start with 2.5-3 gallons and top it off at each "event" so If I do a 30 min hop I'll bring the volume back up then again at 15 min.... generally I finish with a few cups less than starting boil.

I have also been told this will increase hop utilization as adding more water during the boil allows more of the bittering/flavor oils to dissolve

 
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Old 04-03-2006, 01:11 AM   #6
Kaiser
 
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Quote:
Originally Posted by mysterio
I boiled my last batch with the lid on so as not to lose a gallon through evaporation... However I just noticed the John Palmer website said this will give nasty off-flavours. Do you think this will be noticable or am I being paranoid?
Did you notice a green vegetable smell of your wort or beer. This is usually caused by DMS, which needs to be driven out out the wort during boiling.

As the others said, boil w/o a lid on and account for the evaporation loss at the beginning or the end of the boil.

Kai

 
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Old 04-03-2006, 10:55 AM   #7
mysterio
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Didn't notice any smells & I had a rolling boil throughout.

It's packed with centennial so hopefully I won't notice any bad flavours!
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Old 04-04-2006, 01:56 AM   #8
Beer Snob
 
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Hmmm.... I have not noticed any off flavor smells, but boil overs are obviously REAL easy to do with the lid on.
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Old 04-04-2006, 11:00 AM   #9
mysterio
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Not with my pot, I could cook a doberman in there.
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Old 04-04-2006, 01:58 PM   #10
Desert_Sky
 
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I boiled with the lid on. But I have a notch cut in the kettle for my chiller. And not to mention the fact that being my first batches, I had the top off every 2-3 minutes just to see what was going on.
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