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Old 09-04-2012, 04:23 PM   #15
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Name: Norm and Ginny
Trailer: Scamp 16
Florida
Posts: 7,300
Thru the Wall AC

Norm : Wouldn't a thru the wall AC which does not have side vents for exhaust air intakes work better than a window AC . I have one in a 14 " outside wall it blows cool air out the front ,hot air out the back and has no side vent openings. You can buy a screen for the outside to protect the coils And you would not need exhaust fans to get rid of the heat

Steve,
I didn't know that thru the wall AC units were different than window AC units. It seems to me that a thru the wall AC unit has to source the exhaust air from somewhere and certainly not the room air.

A thru the wall AC unit must have inputexhaust air either on the side, top bottom or rear.

I believe it's the same issue, the input air to the exhaust coils must be cooler cooler than the exhaust air. It must be sourced from somewhere and isolated from room air.
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Old 09-04-2012, 06:29 PM   #16
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Name: kitti
Trailer: 1985 13' Scamp
Texas
Posts: 18
ac

Okay, my husband is going to build a completely enclosed duct (chute) from the back of the ac all the way to the approx. 15" square cut on outer wall. Then he is going to cut an approx. 5" circle above the existing 15" square cut for the side vents of the ac to get fresh air from outside the trailer. Does this sound like it will take care of the problem we have with the ac not cooling? Advice please????? I hate to cut another hole if this won't work!
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Old 09-04-2012, 09:21 PM   #17
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Name: jim
Trailer: Burro
Oregon
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I recently put an A/C unit in my 66 Aloha canned ham trailer. I got the info from a fellow who rebuilds these small campers and posts the progress on Youtube. The solution to exhaust the hot air was to put a small fan facing the exterior vent opening. It's a great looking install and it worked on my unit. Send me a PM & Ill eMail a pic. Can't seem to get it to post on this link. I don't see why it wouldn't work as well on your unit.
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Old 09-05-2012, 12:05 AM   #18
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Name: Dylan
Trailer: 2001 Scamp 13'
British Columbia
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Quote:
Originally Posted by kitti in texas View Post
Okay, my husband is going to build a completely enclosed duct (chute) from the back of the ac all the way to the approx. 15" square cut on outer wall. Then he is going to cut an approx. 5" circle above the existing 15" square cut for the side vents of the ac to get fresh air from outside the trailer. Does this sound like it will take care of the problem we have with the ac not cooling? Advice please????? I hate to cut another hole if this won't work!
I think that will work, but heat rises, so you may end up pulling heated air back into the intake where you want cooler air to come in, not warmer air. Best to get the cool air, from below or far away from the hot air vent. A little will probably make no noticeable difference, but if a sizable percentage of the hot air gets pulled back in, efficiency and cooling effectiveness will be affected to some degree.
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Old 09-05-2012, 08:06 AM   #19
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Name: Derek
Trailer: 1973 boler 13', Earlton On
Ontario
Posts: 396
Registry
If this doesn't work, the only other consideration would be to improve airflow with fans.

Climate and the size (BTUs) of the air conditioner have got to be a factor here too. In a climate that is "a little bit hot" you are only going to need "a little bit of cooling power."
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Old 09-05-2012, 09:52 AM   #20
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Name: kitti
Trailer: 1985 13' Scamp
Texas
Posts: 18
ac

Thanks y'all. And my husband said he is going to get a small fan and install it above the ac in the closet to blow down on the ac. It does get very hot in Texas and we haven't got to use our Skamp yet because of this problem. My fingers are crossed!!!
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Old 09-08-2012, 11:14 AM   #21
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Name: kitti
Trailer: 1985 13' Scamp
Texas
Posts: 18
Well, my husband tested his plan and it worked. He used a dryer vent hose and ran it out the escape window in the ceiling. He used heavy cardboard to make a temporary duct tunnel from the back of the ac. He said the ac ran cold the whole time! So now we just have to get the supplies to do the job and it should work. He is going to cut a small round hole above the existing square hole (that is at the back of the ac) to vent a hose for the intake air. He is going to build a tunnel out of duct material going from the back of the ac to the square hole in the outer wall, leaving room around the tunnel for air flow. He is also going to get a small fan to blow towards the ac. We had to take out a shelf the previous owners installed right above the ac. I hate to lose the storage but it's more important in Texas to have ac! I'm hoping he will be finished with it in the next few weeks so we can take her on her first trip ( with us). I want go thank everyone for their advice!!!
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