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Old 07-25-2011, 07:47 PM   #1
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Default CO2 Buildup in Ferm Chamber

I'm using my keezer as my ferm chamber for the first few days of my Hefe's fermentation. This morning I opened the door and stuck my head down inside to get a good look (not using a blow-off tube due to lack of room and cool fermenation anyway - but want to be sure the airlock isn't getting cruddy).

Upon sticking myhead below a certain level, I breathed in a nice breath of sulfuric/burning type air up my nose.

I've seen this in a couple of ferm chamber build posts posed as a question but I couldn't find a good answer - any problem with CO2 buildup in a ferm chamber? Probably less so for mini-fridge conversions, as the door would open and let out the CO2. But for using a keezer type setup, where the door opens up and the heavy CO2 rests inside?

The only type of gas I am familiar with supports the Dutch Oven. So thought I'd ask the question.

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Old 07-25-2011, 07:49 PM   #2
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I don't know how long you'd have to breathe it to pass out, but I'd avoid that. Other than that I like having the nice protective layer of CO2 helping to prevent oxidation of my beer.

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Old 07-25-2011, 07:51 PM   #3
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Put a house plant near your keezer. Yaaay CO2!

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Old 07-25-2011, 07:51 PM   #4
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Mines the same way. Never had any problems with it. Just don't keep your head in there to long.

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Old 07-25-2011, 10:34 PM   #5
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<----can't help but stick his head in the freezer fermenter and getting a whif of the yumminess...I know i'm not the only one!

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Old 07-25-2011, 10:45 PM   #6
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CO2 is more dense than the other components in air (N2 O2) so it will sit in there like water in a bowl. This is why in the old days when beer and wine where fermented in peoples cellars they would walk down the steps holding a candle around there waist level, so they would not suffocate walking down in to a cellar full of C02.

That burning is the CO2 dissolving in the moisture in your nose and forming Carbonic acid.

Its probably a good thing too, in that bugs(insects) wont go any where need that much CO2 and get in to your beer.

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Old 07-25-2011, 11:41 PM   #7
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Quote:
Originally Posted by JoePro
Put a house plant near your keezer. Yaaay CO2!
Yeah, "house plant"
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Old 07-26-2011, 02:13 AM   #8
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Interesting - didn't think of it as a blanket overall in the keezer keeping out other nasties. And I do have a dying plant that should probably be near it. I will try to avoid putting my head inside until I pass out. Although that does sound fun.

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Old 01-18-2012, 03:56 PM   #9
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Not revive a dead thread, but I just noticed this same thing this morning when I checked on my first ever lager. It was impossible to get a whiff out of the airlock because of the harsh C02-laden air. I was a little bummed because I really like smelling the airlock burps.

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