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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Fermentation temperature range
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Old 10-15-2012, 02:47 AM   #1
guttoc27
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Default Fermentation temperature range

I understand about target fermentation temperatures, and how keeping a consistent fermentation temperature is important.

I'm curious, however, if there's a generally "acceptable" temperature range that fermentation can occur optimally at. Specifically regarding temperature "swings" within the active fermentation timeframe.

For example, "3-4 Deg. F swings during active fermentation are acceptable without noticeable effects," or "1-2 Deg blablabla."

Is there are generally accepted range that one can feel confident in?

Thanks!

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Old 10-15-2012, 03:00 AM   #2
freisste
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Originally Posted by guttoc27
I understand about target fermentation temperatures, and how keeping a consistent fermentation temperature is important.

I'm curious, however, if there's a generally "acceptable" temperature range that fermentation can occur optimally at. Specifically regarding temperature "swings" within the active fermentation timeframe.

For example, "3-4 Deg. F swings during active fermentation are acceptable without noticeable effects," or "1-2 Deg blablabla."

Is there are generally accepted range that one can feel confident in?

Thanks!
Each different yeast has its own "sweet spot" for temperature. Sounds like you understand that.

As far as swings, I would say a few degrees is no big deal.

It is important to know which way the temperature swings. Going higher can result in off flavors. Going lower will likely just slow down the yeast.

Changing temperature a lot or very quickly can also shock the yeast which can stress them and cause off flavors.

If you use a swamp cooler, even passively, it will help a lot. When I say passively, I mean just put the fermenter in water to create an insulator with a lot of thermal inertia. You don't necessarily need to add ice to the water bath.
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