From the HBD Archive
From: Enders <enders@plains.NoDak.edu>
Subject: Warm Weather Brewing!
Date: 1990-04-27 16:34:51 GMT

While 90F may be outside the *recomended* fermentation range, most
yeasts will still ferment at temps of up to 100-105F. However, there are a
few things to be aware of. First, higher temps lead to higher levels of
esters in the beer. Depending on the strain of yeast, you may find the beer
you brew to be unacceptably fruity. I think if I were to try frementing at
the high end of the yeast's viability range, I'd choose a very neutral
(read as low ester producing) yeast strain, such as Wyeast #1056 (American
Ale, a.k.a. Sierra Nevada Ale).


Another thing to be aware of is that rapidly changing temps can put a
halt to fermentation prematurely. I think regardless of the temp at which
fermentation takes place, you should try to maintain as even a temp as
possible. At 90F, expect the fermentation to go pretty fast.

If, after a little experimentation, you feel that you can't brew an
acceptable beer at high temps, there are a few ways to keep the fermenter
cool. One way is to set the fermenter in a tub, partly filled with water.
Drape wet towels around the fermenter, with one end of each towel in the
water. This provides evaporative cooling, and can presumably keep the
fermenter at 10 deg. or so below the ambient air temp (depending on the
humidity). There is also a commercial device available called a "Brew Belt"
which I have not seen, and don't know how it functions (I'll leave the
description of it to someone more knowledgable).

I'm sure I'll become a little more expert at warm weather brewing as
the summer progresses. I haven't had occasion to brew very often when
it's hot, so my experience is very limited (However, this is changing, as it
looks like I'm going to be doing a LOT of brewing over the next several
months. Stay tuned :-)

Hope this helps!

Todd Enders arpa: enders@plains.nodak.edu
Computer Center uucp: ...!uunet!plains!enders
Minot State University bitnet: enders@plains
Minot, ND 58702


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