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Old 04-10-2008, 03:36 PM   #1
Joe Camel
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Mar 2008
Charlottetown, PE, Canada
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Hey all,

A lot of sites discuss fermentation temperature when brewing ales and lagers and most say for instance that if the ale is fermented at >18C, you'll get ester production and make a fruitier beer.

Is the temperature they're quoting the liquid temp or the air temperature as our room we're fermenting is typically 15 - 19C but the fermentation is generating it's own heat and is usually 22-23C during krausen despite the cool room.

Thanks in advance,

Joe

 
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Old 04-10-2008, 03:45 PM   #2
Beerrific
 
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They are talking about the temperature of the beer. Yeah, active fermentation can produce quite a bit of heat.

 
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Old 04-10-2008, 04:07 PM   #3
EdWort
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Quote:
Originally Posted by Beerrific
They are talking about the temperature of the beer. Yeah, active fermentation can produce quite a bit of heat.
During the active phase of fermentation the temperature delta can be 8-10 degrees Fahrenheit. I have noticed this because I use painters tape to place my digital controller's sensor to the side of the bucket. Another digital thermometer placed in a sippy cup with a lid and water will show ambient temp in my freezer/fermenter at 55 degrees, when the side of the bucket is 65 degrees. Within a couple days, the two displays will be in sync.

 
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Old 04-10-2008, 08:05 PM   #4
Joe Camel
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Quote:
Originally Posted by EdWort
During the active phase of fermentation the temperature delta can be 8-10 degrees Fahrenheit. I have noticed this because I use painters tape to place my digital controller's sensor to the side of the bucket. Another digital thermometer placed in a sippy cup with a lid and water will show ambient temp in my freezer/fermenter at 55 degrees, when the side of the bucket is 65 degrees. Within a couple days, the two displays will be in sync.
So if I'm to ferment an ale at 65, the ambient should really be 55ish, I guess that's why our ales are always estery, we're targeting a room temp of about 65 and getting a fermentation closer to 74

Thanks, this'll help

 
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