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Home Brew Forums > Home Brewing Beer > DIY Projects > Kegerators and Keezers > Keezer Fan
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Old 02-15-2011, 01:52 AM   #1
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Default Keezer Fan

I just got a GE 5 Cu Ft freezer and a ranco thermostat that should be arriving shortly. I only have two kegs and don't plan on getting ay more while i'm living in my current apartment. Do I need a fan to circulate the air in the keezer? If so would it need to be always on or only when the compressor kicks on?

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Old 02-15-2011, 02:01 AM   #2
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Fan is a definate must. I have a cheapo desk fan from Menards. I let it run all of the time.

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Old 02-15-2011, 02:22 AM   #3
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Default Forced Air Convection

Running the fan will MOST DEFINITELY chill a warm keg down to temperature. It will chill it faster, because the energy transfer medium (air) is continuously hitting the warm keg, heating up, and then striking the frozen walls of the freezer to be chilled. After the air is chilled, it will return to the warm keg, and chill it.

BUT! When the keg is already cold, you want to keep the heat transfer to a minimum by turning the fan off. When the keg is cold, the only way it will heat up is by warm air hitting it. If the fan is on, then the hot air from the freezer walls will be bashing in to the keg and heating the keg. In the same respect, the cold air that was just insulating the keg is striking the walls of the freezer.

Use the fan to chill warm kegs, and let the freezer, there after, keep the walls of the freezer cool.

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Old 02-15-2011, 02:27 AM   #4
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Quote:
Originally Posted by DarkNoonBrewer View Post
Running the fan will MOST DEFINITELY chill a warm keg down to temperature. It will chill it faster, because the energy transfer medium (air) is continuously hitting the warm keg, heating up, and then striking the frozen walls of the freezer to be chilled. After the air is chilled, it will return to the warm keg, and chill it.

BUT! When the keg is already cold, you want to keep the heat transfer to a minimum by turning the fan off. When the keg is cold, the only way it will heat up is by warm air hitting it. If the fan is on, then the hot air from the freezer walls will be bashing in to the keg and heating the keg. In the same respect, the cold air that was just insulating the keg is striking the walls of the freezer.

Use the fan to chill warm kegs, and let the freezer, there after, keep the walls of the freezer cool.

*ENGINEERED*
Using that logic having the fan connected to my thermostat would be the way to go. The compressor will only turn on when the temp in the keezer rises over the threshold. When the compressor is turned off the keg will be cooling the air in the keg just as much as the walls, so when the walls need to be cooled so then does the kegs.
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Old 02-15-2011, 02:35 AM   #5
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i've never used a fan. what is the big advantage of the hassle?

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Old 02-15-2011, 03:23 AM   #6
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Advantage? Idk. I'm not a fan of the fan. I just know when and where it would work. I wish I had a fan in my oven, for real!

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Old 02-15-2011, 05:43 AM   #7
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connecting a fan to the same circuit as your freezer should drop the rate at which the freezer cycles on, and will also cut the time it is on with each cycle.

i use the bilge fan that tomd found, it works great on about a 5v feed.

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Old 02-15-2011, 06:20 AM   #8
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I installed a 110v AC muffin fan in my freezer and it runs continuously. I have it configured this way to keep the beer lines and taps well cooled along with the kegs. This has been working extremely well for me.

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Old 02-15-2011, 07:19 AM   #9
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I installed a 110v AC muffin fan in my freezer and it runs continuously. I have it configured this way to keep the beer lines and taps well cooled along with the kegs. This has been working extremely well for me.
Whats a muffin fan?
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Old 02-15-2011, 02:30 PM   #10
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Whats a muffin fan?
Computer type cooling fan similar to these: http://www.surplussales.com/fans-blo...ansBlow-3.html
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