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Old 07-28-2015, 12:48 PM   #1
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Interior Fridge Fan a Good Idea?

My brother-in-law placed a 120mm fan on the evaporator fins inside his Class C RV fridge. He claims it provides better cooling during hot weather.

Found some examples:
Dometic Evaporator Fan Greater inside Cooling Deluxe Model - RV Cooling Unit Warehouse

Fridge-Fix

Some people just buy PC cooling fans and mount them on the evaporator fins.

Any one do this on their Airstream?

Kelvin
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Old 07-28-2015, 01:20 PM   #2
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If you have a fully stuffed and packed refrigerator which cuts off all normal circulation, there might be some advantage. Otherwise none.

Understand this is my opinion, and others might disagree. But I have used computer fans inside RV refrigerators and have found no differences in how they worked or how cool they kept.
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Old 07-28-2015, 04:12 PM   #3
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What about reducing the frost build up? Did it make any difference there? If not that's 1 job I can scratch off my do do list.
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Old 07-28-2015, 06:43 PM   #4
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I respectfully disagree! An internal fan helps with convection and helps make the cooling process faster. I noticed an immediate effect, and a much faster recovery after the door I has been opened.
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Old 07-29-2015, 11:33 AM   #5
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Totally Agree with AtomicNO13 and yes it has helped with the frost. We had a problem where the frost would accumulate on the coils then drip inside and we would get a puddle on the bottom of the refrigerator - this is no longer a problem.
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Old 07-29-2015, 11:42 AM   #6
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I bought a cheap battery powered fan years ago, and it is a game changer for evaporative refrigerators. Can't recommend it enough. In layman's terms, it moves the cool around and doesn't allow the stuff near the fins to freeze. Simple.
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Old 07-29-2015, 12:09 PM   #7
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I have used one like the one pictured here for years... I believe they work... read the reviews...

Amazon.com: Valterra A10-2606 FridgeCool 11.28 mA Fan with On/Off Switch: Automotive

Like every other product in life... pay your money... make your choice... or not...
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Old 07-29-2015, 12:19 PM   #8
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I've had one of those battery powered fans before and didn't think they worked. I was hoping a larger fan would be different.

Kelvin
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Old 07-29-2015, 12:29 PM   #9
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I have the cooling unit warehouse model and really like it's effectiveness and construction. 2 things about it though: 1) the switch is located in a spot where, occasionally, cans of soda can switch it off as they bounce around, especially if they are on their side. No biggie, only has happened twice in the 3 years of operation.
2) the computer fans used are cheap bushed fans and wore out in a couple years. ball bearing fan replacement was necessary, are quieter, and move more air. inexpensive off amazon and back in business.

Again, very effective along with relocating the thermostat probe and my outside fan configuration. I now run at -2* - -4*F in the freezer and 34 - 36*F in the fridge on setting #3, at 85*F ambients.
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Old 07-29-2015, 12:41 PM   #10
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Kelvin,

I would agree with the affirmative comments above. We installed a 12V dual fan that we purchased off of eBay and attached on the cooling fins inside the fridge. Helps in initial cool down and in my opinion, greater efficiency in the keeping items cold.
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Old 07-29-2015, 12:48 PM   #11
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Dear Richie,
I use the battery operated fan that uses 2 size D batteries every time I light up my refrigerator. It makes a lot of difference in cooling down the frig quickly, I was at the last International Rally in Farmington, NM this past June-July that had some of the hottest weather ever. My frig kept a steady 38 to 39 degrees the whole time day or night. It is worth the minimal investment you pay for this litte toy.
Sincerely, John
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Old 07-29-2015, 12:54 PM   #12
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A 12V computer fan or similar should do wonders. An additional two inch insulation around the fridge makes an even bigger difference, but is difficult to accomplish without a lot of rebuilding.
A further improvement may be to connect the area where the fan is located, to a floor vent that draws in air from the mostly shaded area below the trailer.

Van Williams.
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Old 07-29-2015, 01:29 PM   #13
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"A further improvement may be to connect the area where the fan is located, to a floor vent that draws in air from the mostly shaded area below the trailer."

I would definitely not want to be bringing in fresh air to the reefer compartment. Cold air would need to escape somewhere..likely around the door seals which will cause a lot of condensation at the seals...not to mention excess load on the limited cooling available from the fins.. Home refrigerators circulate air from the freezer to the fridge compartment but they do not bring in fresh air.
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Old 07-29-2015, 01:56 PM   #14
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Quote:
Originally Posted by JCWDCW View Post
"A further improvement may be to connect the area where the fan is located, to a floor vent that draws in air from the mostly shaded area below the trailer."

I would definitely not want to be bringing in fresh air to the reefer compartment. Cold air would need to escape somewhere..likely around the door seals which will cause a lot of condensation at the seals...not to mention excess load on the limited cooling available from the fins.. Home refrigerators circulate air from the freezer to the fridge compartment but they do not bring in fresh air.
JCW
I think he was talking about external fans outside the box.
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