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Author Topic: 12v fan in the refrigerator vent space  (Read 2216 times)

Papachazz

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12v fan in the refrigerator vent space
« on: October 19, 2015, 10:31:14 PM »
I was looking into getting a 12v fan to place in the vent space behind my refrigerator to help vent the heat quicker. Has anyone used these type of fans and how well do they work. The manufacturer claims that it will reduce the cool down time of the fridge by half and increase the efficiency while it is running. While it is fairly inexpensive for the fan I'm just wondering if it is something that would be a worthwhile upgrade.
1998 Keystone Springdale Lite 190FL
2014 Dodge Grand Caravan
Tent Campers turned Trailer Campers

Lou Schneider

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Re: 12v fan in the refrigerator vent space
« Reply #1 on: October 20, 2015, 01:56:24 AM »
A fan can help in hot weather, but probably won't make much difference in cooler temperatures unless something is choking off the airflow behind the refrigerator. 

Normally the hot coils behind the refrigerator set up a fireplace-like chimney effect.  Air heated by the coils escapes out the roof vent while drawing in cooler air through the lower inlet.

This works in cool weather, but may break down when the outside air gets into the 90s and above because there isn't enough difference in temperature between the coils and the outside air to keep the chimney working.  In this case, adding a fan to push the air up and out the top vent can help the refrigerator get rid of it's waste heat and keep working efficiently.
« Last Edit: October 20, 2015, 01:59:38 AM by Lou Schneider »

catblaster

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Re: 12v fan in the refrigerator vent space
« Reply #2 on: October 20, 2015, 06:46:48 AM »
I put a muffin fan in the vent hood and wired it to the a 12v connection at circuit board. Used a fuse holder with spade fuse so I can disconnect in winter or when not in use. Works good and it does make the beer...or milk...colder, no difference in winter.
Will and Jane
95 Winnebago Luxor

kjansen

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Re: 12v fan in the refrigerator vent space
« Reply #3 on: October 20, 2015, 08:13:39 AM »
My Montana came with 2 fans hooked to a thermostat.  I didn't realize this until I heard them start one day.  I did add 2 fans to my frig on my houseboat and they did help on hot days.  I hooked them up to a switch that I could turn on when I needed them.  It was a cheap fixed and worked well.
Keven Jansen
'06 Chevy 2500 Duramax
'02 Montana Big Sky
Alexandria, Mn

Kim (skyking4ar2) Bertram

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Re: 12v fan in the refrigerator vent space
« Reply #4 on: October 20, 2015, 08:19:54 AM »
My first coach had some issues with the refrigerator not cooling well, and after the fans were added, it made a world of difference. For me, it was an inexpensive and worthwhile solution.

Two cents worth.  8)
Kim & Christi Bertram
SKP 106183
FMCA 420913
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2012 Thor Damon Tuscany 42RQ
2014 Jeep Grand Cherokee Diesel
Wanderlust RV Park, Eureka Springs, AR

530ktm

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Re: 12v fan in the refrigerator vent space
« Reply #5 on: October 20, 2015, 01:24:48 PM »
My coach comes from the factory with fans to exhaust the heat since my fridge is in the slide and no vent up top. It is the best fridge freezer I have had yet in regards to motorhomes.
2014 Itasca Sunova 33C from SoCal pulling Jeep Wrangler

Papachazz

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Re: 12v fan in the refrigerator vent space
« Reply #6 on: October 20, 2015, 07:24:27 PM »
It sounds like it would be a worthwhile upgrade. Thanks everyone for the advice.
1998 Keystone Springdale Lite 190FL
2014 Dodge Grand Caravan
Tent Campers turned Trailer Campers

regval

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Re: 12v fan in the refrigerator vent space
« Reply #7 on: October 20, 2015, 10:41:45 PM »
https://m.youtube.com/watch?v=RQL5_rnilyM

See the link above. I am not endorsing this product and only passing along some info.
I have a home made version and it works well for those hot days when it seems to take a long time to get the frig cold after setting up camp.
2005 Forest River TT 27BHSS and 2009 Heartland Sundance 2998RB 5vr
2007 Chev Silverado 2500HD WT crew cab, LB, 6.6L, Allison 6sp, B&W Companion Hitch
Retired Biomedical Engineer
Lawrenceville, GA

"Some come to the fountain of knowledge to drink, others just gargle."

Papachazz

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Re: 12v fan in the refrigerator vent space
« Reply #8 on: October 21, 2015, 08:59:21 PM »
That was actually the model of fan that I was looking at Reg. Thanks for the link.
1998 Keystone Springdale Lite 190FL
2014 Dodge Grand Caravan
Tent Campers turned Trailer Campers

8Muddypaws

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Re: 12v fan in the refrigerator vent space
« Reply #9 on: October 21, 2015, 09:11:07 PM »
Not being an expert on laminar flow I can only relate my experience on this.  It is much more effective to draw the air through the system than to push it.  A fan at the top blowing hot air out works much better.

I installed 4 super quiet muffin fans in my top vent and it made a huge difference in cooling performance.
Retired computer professional
Musician, songwriter and music director
2006 Bounder 34H, 2008 CR-V Toad

Papachazz

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Re: 12v fan in the refrigerator vent space
« Reply #10 on: October 21, 2015, 09:17:41 PM »
Thanks Mudd. I only have one access to the space behind the fridge and that is at the bottom so I was thinking about mounting it in the vent pipe on the roof to draw the air out. That way it is pulling in fresh air from the bottom vents and not trying to blow it back out the same vents.
1998 Keystone Springdale Lite 190FL
2014 Dodge Grand Caravan
Tent Campers turned Trailer Campers

Harleypr

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Re: 12v fan in the refrigerator vent space
« Reply #11 on: November 03, 2015, 09:10:31 PM »
I have two Corsair 120mm computer fans mounted under the top Norcold vent. I had to make a mount out of aluminum angle and it worked good. Good idea to seal around the edge of the fans to the surround so it pulls air from the bottom and not in a circular fashion st the top.
I have a Fridge Fix inside the fridge and an ARP controller with the fan option installed to control overheat of the Norcold. The fan control wire handles both the Fridge Fix and the two Corsair fans by merely connecting the wires to the fan control wire. Since install my fridge has performed flawlessly. Set on setting 4 it has kept the temps perfect from below freezing to 95 degrees. The cool down is about 2 hours to normal fridge temps, not 8-10 hours like it used to be. The ARP runs both the Corsairs and the Fridge Fix only when the unit is producing coolant.
With this combo system you will be extremely happy.
I See that ARP is a sponsor on this forum and they will answer any questions you may have. Their after sale service is top notch.
Good luck!

 

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