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Old 12-16-2010, 09:36 PM   #1
Nov 2010
seattle, washington
Posts: 100
Liked 1 Times on 1 Posts

I have a small chest freezer that I am setting up as a fermentation chamber with dual temperature control. This may sound like an odd question considering once a fermentation is going the head space will fill with carbon dioxide but I am curious if there is any possible issue if I have the lid completely closed and it's a sealed freezer. Do I need to worry about providing any type of air flow?

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Old 12-16-2010, 10:01 PM   #2
Mann Cave Brewer
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Aug 2007
Mannford, OK
Posts: 491
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Nope. Once the wort is oxygenated the yeast have all they need. The sealed freezer won't hurt anything.

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Old 12-16-2010, 11:29 PM   #3
Jul 2008
San Bernardino, CA
Posts: 93

Not unless it builds up excess pressure, but the seal around the lid of your freezer is more than permeable enough to let gas escape. If I were you, I'd be more worried about condensation than co2.
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