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Old 10-31-2010, 09:05 PM   #1
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Non-rooftop A/C?

We have been thinking about installing a truck-type A/C unit under one of the bunks or under the oven in our (newly acquired) 62 Trade Wind. Has anyone considered or done this before? It would avoid having to deal with customizing the roof. Here is a link to one these units, as an example:

Dometic Truck Products
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Old 10-31-2010, 10:13 PM   #2
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I think the roof is the preferred location for the a/c because heat rises/cooled air falls. If the a/c unit is too low it will only cool the bottom of your trailer.

Just a thought!

Cathy
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Old 10-31-2010, 10:17 PM   #3
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In-room AC?

The truck-type ones sound neat, but if our rooftop AC dies, I'll probably go with one of those in-room ACs on wheels. I would make a window attachment for the vent. I don't do so much hot weather camping, and having a temperamental, expensive appliance out there where it gets wet and things try to build nests in it seems less than ideal. Also, I'm all for fewer appliances in my life, and this could live in the house. For when we're moving, I'd wrap a blanket around it, and bungee it to the dinette so it doesn't go flying. Just another idea.

Something like this one, maybe with higher BTUs:

Amazon.com: Haier Portable Air Conditioner, 8000 BTUs, CPRB08XCJ: Home & Garden: Reviews, Prices & more

Brad
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Old 11-01-2010, 04:40 AM   #4
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Red neck version. You could put a window unit in the back window when you are parked and take it out and put it on the floor when you travel. It works and is low cost.
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Old 11-01-2010, 08:48 AM   #5
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Quote:
Originally Posted by 65Safari65 View Post
The truck-type ones sound neat, but if our rooftop AC dies, I'll probably go with one of those in-room ACs on wheels.
There are two types of those.

The good type has an air inlet hose and air outlet hose, and they're about the same efficiency as normal ACs.

The bad type just has an air outlet only, and uses room air as the inlet. Due to this, it constantly draws in outside air to the room - these units operate at about half the efficiency of the good units. THEY LIST THE SAME BTUs. But they are half as effective.

Also, these units are usually 50-100lbs heavier than a static AC.
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Old 11-01-2010, 08:48 AM   #6
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Lightbulb

Here's an example of the red neck version. It works great, draws only 7 amps on AC power, only needs one Honda 2000 generator, and I swear I didn't use one piece of duct tape.


http://www.airforums.com/forums/f42/...tml#post821583
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Old 11-01-2010, 08:48 AM   #7
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Not wanting to spoil the iconic shape of the Argosy with a clunky, over bearing rooftop, I used a commercial/residential LG model called Art Cool. Blower head inside is 20”x20” and 5” deep. Compressor is out on the tongue. (No propane; the trailer is diesel powered)


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Long thread but more information here:

http://www.airforums.com/forums/f227...tml#post628818

Sergei
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Old 11-01-2010, 09:11 AM   #8
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Quote:
Originally Posted by 65Safari65 View Post
The truck-type ones sound neat, but if our rooftop AC dies, I'll probably go with one of those in-room ACs on wheels. I would make a window attachment for the vent. I don't do so much hot weather camping, and having a temperamental, expensive appliance out there where it gets wet and things try to build nests in it seems less than ideal. Also, I'm all for fewer appliances in my life, and this could live in the house. For when we're moving, I'd wrap a blanket around it, and bungee it to the dinette so it doesn't go flying. Just another idea.
Brad
These seem to have never worked well for anyone who needs truly cool air.
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Old 11-01-2010, 09:34 AM   #9
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Quote:
If the a/c unit is too low it will only cool the bottom of your trailer.
this is not true. a trailer with an appropriately sized a/c gets cooled fine. we built in a window a/c into our cabinetry in front of an access door. we open the access door for venting. it cools teh trailer very well.

Quote:
These seem to have never worked well for anyone who needs truly cool air.
in regard to the portable a/c units, we looked into these also. the ones that work properly are a bit more expensive and start @ 12,000BTU's - they are called 'dual intake' i believe - A Dual-hose setup won't create negative pressure inside the room and therefore wont draw in air from outside to the area that is being cooled. we didnt go this route b/c 12k btu's was way overkill for our 19ft trailer. might work on a 30fter.
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Old 11-01-2010, 12:18 PM   #10
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Quote:
Originally Posted by tlsmit1 View Post
We have been thinking about installing a truck-type A/C unit under one of the bunks or under the oven in our (newly acquired) 62 Trade Wind. Has anyone considered or done this before? It would avoid having to deal with customizing the roof. Here is a link to one these units, as an example:

Dometic Truck Products
I believe SmokelessJoe is the only one who has actually gone ahead with a split system install and written about it on the forums. There are several people who have installed window-type units through the trailer wall.

The RV industry uses rooftop units not because hot air inside the trailer rises but because, across the industry, it is the most practical and inexpensive design for a packaged A/C with minimal impact on trailer design or production. The ducted "basement" units (designed to install more or less like a propane furnace) utilized in some of the larger bus-frame motorhomes are costly and prone to problems with condensation inside and outside the ducts. Management of airflow on the outdoor side of the unit is also a problem with these. They are either ducted through the floor or through a grill on the side of the coach.

The split systems like the one SmokelessJoe installed, and like one of the ones in the OP's link, have to be installed and maintained by a refrigeration tech with the equipment and certification to work on the refrigerant system.

Window A/C units require venting from the sides and therefore must extend out from the wall, so in practice you can only install them in the rear wall unless they are on a slide (which some have done). There are wall-mount A/C units sold for apartments, which vent from the back only, which would work but would use up a good deal of interior or compartment space.
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Old 11-01-2010, 12:59 PM   #11
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Quote:
Originally Posted by tlsmit1 View Post
We have been thinking about installing a truck-type A/C unit under one of the bunks or under the oven in our (newly acquired) 62 Trade Wind. Has anyone considered or done this before? It would avoid having to deal with customizing the roof. Here is a link to one these units, as an example:

Dometic Truck Products
This is a great idea/solution . . . I was very excited when I found that source as well . . . then I found out how much, and the ac unit sticking out of a window didn't look nearly as bad.
MarkR
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Old 11-01-2010, 01:15 PM   #12
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I am on the same page. Saw an LG installed on a vintage trailer, it looked great, cost over 1000.
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Old 11-01-2010, 02:11 PM   #13
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Quote:
Originally Posted by tlsmit1 View Post
We have been thinking about installing a truck-type A/C unit under one of the bunks or under the oven in our (newly acquired) 62 Trade Wind. Has anyone considered or done this before? It would avoid having to deal with customizing the roof. Here is a link to one these units, as an example:

Dometic Truck Products

I removed my old furnace and installed a 8kbtu window AC on a simple sliding shelf with a lock. The old furnace shroud was attached to the slider after these pics were taken so when it's closed you can't tell there is not a furnace there. It will operate on a 2k Honda genset with power to spare, and it will cool the Safari down to the mid sixties on a 90 degree day with no shade.
I use a oil-filled radiator for heat when I have shore power and I expect to install a marine woodstove or propane radiant heater in the future.

Regards,
Rich the Viking
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Old 11-01-2010, 04:25 PM   #14
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Under bed AC

Uwe Salwender installed an under the bed Dometic AC in our 68 rebuild. I thought they had stopped making them but maybe it is the same thing as the truck one.....it looks similar.....to ours....you would have to check with Uwe for the particulars.....we also have 2 fantastik fans and I prefer to use those when we can.......they do a pretty good job of cooling the trailer in the evening.....the AC makes it okay in the daytime if we have power. And it looks great not having it stuck up on the roof.....we have two solar panels up there so the real estate is dear. paula
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