Ouestion about putting a fan in refrigerator - Fiberglass RV


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Old 01-04-2013, 12:47 PM   #1
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Ouestion about putting a fan in refrigerator

Looking at putting a fan inside of my refrigerator for better air circulation.
Do you have the air blow on the fins or away from the fins inside the refrigerator?

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I know you can buy fans that sit on the shelf or mount to the fins but I want to use a computer fan.
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30cfm should be about right.

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Old 01-04-2013, 12:53 PM   #2
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The most effective location for a fan is to blow air over the outside fins of the fridge. This actually improves the effecincy of the fridge.

An inside fan typically just improves how quickly a warm addition to the fridge will cool.
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Old 01-04-2013, 12:54 PM   #3
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Kevin, I don't think that it matters. The main thing is forcing air circulation over the fins. I used a tiny computer fan about 1" in diameter and it seems to work well (50* inside / outside differential).

I agree with Norm that an outside fan will be more effective.
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Old 01-04-2013, 02:23 PM   #4
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I have a small 2.25" computer fan for the inside. How many cfm's should I use for the outside fins?
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Old 01-04-2013, 02:30 PM   #5
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I have a small 2.25" computer fan for the inside. How many cfm's should I use for the outside fins?

I'm guessing about 35 to 50 CFM - about a 4" fan.
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Old 01-04-2013, 02:41 PM   #6
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I use 2 computer fans. Therr's a 12 volt pickup in the back of the fridge. I run a switch to the front of the fridge
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Old 01-04-2013, 02:55 PM   #7
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Should I put one in the bottom vent to draw in air and one in the top vent to push air out?
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If I put a fan in the top vent I would have to drill out the rivets to get behind the vent.Click image for larger version

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Old 01-04-2013, 03:03 PM   #8
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Should I put one in the bottom vent to draw in air and one in the top vent to push air out?

If I put a fan in the top vent I would have to drill out the rivets to get behind the vent.
I had the same problem. I mounted the fan under the heat exchanger blowing upward. That way I can access it from the lower door if it needs to be serviced.
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Old 01-04-2013, 04:20 PM   #9
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I placed my fans in the accesible area blowing up. I simply stuck them between the coils behind the fridge's access door. They blow up. I simply tywraped them to the black tubes. Still there after 33 states and 2 provinces. I believe theres apicture in modifications/ preparing a 1991 scamp
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Old 01-04-2013, 04:23 PM   #10
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I made a metal bracket to hold the fan and used stainless hose clamps to hold the bracket to the tube under the heat exchanger. The fans don't like direct, conducted heat, so don't mount it directly to anything that gets really hot.
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Old 01-04-2013, 05:39 PM   #11
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We use one of the cubes that sits inside, and find it helps a lot in keeping the temps even. It really should not matter where a fan is placed, as long as there is circulation. Even moving real slow is fine, as long as it circulates all the air every few minutes.
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Old 01-05-2013, 02:16 AM   #12
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I've used the Blue one for years and set it on the bottom of the fridge.

I also put a fan in back of the fridge to help the hot air vent out. I have a switch inside of my trailer to turn it on. However, I've not really camped in extreme weather since I put it there so I've only turned it on once or twice and can not testify to it's effectiveness.
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Old 01-05-2013, 10:19 AM   #13
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I have used the battery operated blue one for two years and it really helps inside the fridge. We don't get some items freezing while others spoil, the temperature seems to be consistent throughout now. Tried an outside fan before but that didn't help our problem.
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Old 01-05-2013, 10:28 AM   #14
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I have used the battery operated blue one for two years and it really helps inside the fridge. We don't get some items freezing while others spoil, the temperature seems to be consistent throughout now. Tried an outside fan before but that didn't help our problem.

Right. The fan in back makes the refrigerator colder inside. The fan inside makes the temperature more even inside and makes the fridge cool off faster.
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