fan for fridge? - Fiberglass RV


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Old 07-12-2011, 10:37 AM   #1
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fan for fridge?

I'm tackling a changeover from the dorm fridge that the PO put in my Boler, to a 3-way. I'm installing my vents like the "almost good venting" from the site recommended a few other times on here Gas/Electric Fridge Venting

However, I'm not sure where people have installed the small 12v fans (or computer fans, etc) to help the airflow best? Thoughts or help? Thx!
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Old 07-12-2011, 11:49 AM   #2
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Luke, on my fridge I have two vents. The one on the bottom opens to access turning on the fridge, and the other one over it is rivited on. I put mine behind the upper vent before installing the cover. Since I had installed wood cabinets, I put in a 1X2 near the top of the opening and secured the two computer fans to it. I figured that since hot air goes up, it was best to put the fan on the top. I also have it blowing out.
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Old 07-12-2011, 12:43 PM   #3
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Upper vent is ideal

The most efficient installation is in the upper vent blowing up and out to PULL the draft across the coils. Pushing from the bottom doesn't seem to work right.
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I made mine accessible because I installed 2 fans, 1 Big and 1 small with a DPDT switch between them. The big fan draws 4X the amps as the small one which is much quieter. I use the big one for fridge cool down assistance at the beginning of a trip when plugged in to A/C power. The small one is used when Boondocking on battery power.
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Old 07-12-2011, 01:24 PM   #4
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I installed one fan between the first set of coils blowing up towards the fins, just tywraped to coils. It's worked well.

Before installation it would get to the low 40's on a day like today, 92F, it's at 35 now.

Norm
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Old 07-12-2011, 06:02 PM   #5
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thanks! on a side note, I believe that I'll be cutting in the top vent above the belly band so it's above the fridge. This appears to be cutting into the fiberglassing that creates the flange that the belly band covers. Is this an issue, structurally?
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Old 07-12-2011, 06:30 PM   #6
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thanks! on a side note, I believe that I'll be cutting in the top vent above the belly band so it's above the fridge. This appears to be cutting into the fiberglassing that creates the flange that the belly band covers. Is this an issue, structurally?
I believe a good part of the fridge's problem is that it doesn't vent thru the roof like most RV's.

With that said, my solution seems to work well and requires no cutting and costs about $10. You can see it in the Modification under Preparing a Scamp 16.

It's very easy to try and can be done in 15 minutes.

Norm
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Old 07-13-2011, 09:05 AM   #7
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Thanks Norm - this is assuming that you have some outside venting tho, correct? Since my Boler had a dorm fridge, and assumably an ice box before that - I had no venting to the outside.


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I believe a good part of the fridge's problem is that it doesn't vent thru the roof like most RV's.

With that said, my solution seems to work well and requires no cutting and costs about $10. You can see it in the Modification under Preparing a Scamp 16.

It's very easy to try and can be done in 15 minutes.

Norm
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Old 07-13-2011, 11:43 AM   #8
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Thanks Norm - this is assuming that you have some outside venting tho, correct? Since my Boler had a dorm fridge, and assumably an ice box before that - I had no venting to the outside.

Follow the manufactures installation instructions on how to vent. With a 3 way fridge it's absolutely necessary to vent to outside.
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Old 07-13-2011, 01:58 PM   #9
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Sorry, I've never had an ice box job but I did install a dorm fridge in place of one. I guess I'm too young (68 LOL) to remember them.

Actually one of my first memories is of the ice man bringing a block of ice in probably 1946.

Good luck cutting. I haven't cut thru any exterior walls yet but have cut a number of internal walls. It cuts pretty easily. I out line the hole to be cut with blue painters tape to protect the remaining surface.

Norm
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Old 07-13-2011, 03:47 PM   #10
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No problem, just wanted to make sure I wasn't missing something! As Byron said, my understanding was that vents were needed - and I cut them in last night! Went smooth.

NOW, how do you all keep water from soaking in the inside, when it's raining/driving???? Do you have some sort of vent cover?

Last question, does a 3-way fridge drain somehow? Mine is used and with no manual...
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Old 07-13-2011, 04:23 PM   #11
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Did you try looking online for a manual ?

Bill K


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No problem, just wanted to make sure I wasn't missing something! As Byron said, my understanding was that vents were needed - and I cut them in last night! Went smooth.

NOW, how do you all keep water from soaking in the inside, when it's raining/driving???? Do you have some sort of vent cover?

Last question, does a 3-way fridge drain somehow? Mine is used and with no manual...
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Old 07-14-2011, 12:36 AM   #12
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Luke,
You can see how I prepped for mine here:
Improving fridge venting
If you notice, I used tongue and groove flooring and sheet metal to seal the fridge off from inside. I plan on putting fans somewhere between the sheet metal and the belly band in the pictures. I plan on using two computer fans that I'm told if you connect them in a certain way they will run at half the speed and draw less power. I'll ask my electrical guru's when the time comes to connecting them. I also plan on controlling them with a switch from the inside.
If you look closely at the second picture in my post, the fridge came with a thermocouple controlled fan just below the lower fins. Keep in mind this fridge was designed for a VW Westphalia camper that has its lower vent opening through the floor. If you search this site, you will notice that others mention lining your fridge compartment with reflectix.
Sure there is lots to think about, post pictures of what you do. I know my mods in the venting without the fans made a huge difference in how well the fridge works. I can only imagine the fans will help even more.
I have not yet experienced any structural problems putting the upper vents above the belly band. I imagine that is because the kitchen cabinets provide support in that area. Oh yeah, putting in dampers to direct the flow across the fins is important. (sort of a chimney effect) I've shown mine in my pics.

Roy

PS, the manuals for many fridges are in the document center here.
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Old 07-14-2011, 01:16 PM   #13
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Luke;

Roy's suggestions are very good. Here are some photos of what I did in my case.
16 foot 1982 Fiber Stream pictures from friends & fun photos on webshots

See photos #80-82 at the bottom of page 3 (if you use the 28 photo thumbnail display).

Vic
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Old 07-14-2011, 01:53 PM   #14
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Luke, What is the model make of your Fridge ? I've never seen anything to cover the vent cover for rain. It really shouldn't get too much in there while driving. And yes there is a clear plastic tube that you vent through the floor near the vent that you can open (lower) . You really should get a manual they have quite a bit of info in them.
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