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Old 05-25-2013, 02:37 PM   #1
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Portable AC Unit

I purchased a portable ac unit and want to run the flexible exhaust hose thru the floor furnace and wanted to know if anyone here has ever tried that?
10000 btu unit purchased on craigs list
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Old 05-25-2013, 02:50 PM   #2
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An RV furnace is a closed system, you'd just be putting the heat from the A/C back into the RV through another vent or even the return. The exhaust from the A/C must be vented to the outside, perhaps through a window with a home built piece of plywood or foam board to seal the opening around the exhaust hose.
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Old 05-25-2013, 03:17 PM   #3
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Quote:
Originally Posted by quickiwe View Post
I purchased a portable ac unit and want to run the flexible exhaust hose thru the floor furnace and wanted to know if anyone here has ever tried that?
10000 btu unit purchased on craigs list
No not me, probably no one else either. An RV furnace has a certain amount of ducts which come out of the furnace separately. There would not be an open port to install an AC duct, to use the others for AC. I'm sure once you pull the furnace, it will all become clear.

If you put "T's" in the ducts to run the AC through, then you have a back-flow issue into the furnace out of the furnace intake. The same in reverse when running the furnace.
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Old 05-25-2013, 04:32 PM   #4
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You need a LOT of air, and it needs to go OUTSIDE as it carries the heat.

Either it will draw in outside warm air and defeat the cooling, or build closed system for the condenser.

Or mount it outside and duct in the cool air.

Lots of work, roof units work better and designed for RV, the portable things usually POS unless commercial for portable cooling or servers
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Old 05-25-2013, 04:39 PM   #5
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I used a portable AC for one season. I cut a thin piece of plywood to fill the void on the sides of the vent hose exit in a small open window. I found the unit to work well but it was a hassle to move around and store. It was nice in that you could move it around to be close to you. The following year I added another roof top AC unit and am pleased with the extra cooling capability.
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Old 05-25-2013, 08:10 PM   #6
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Originally Posted by clyon51 View Post
No not me, probably no one else either. An RV furnace has a certain amount of ducts which come out of the furnace separately. There would not be an open port to install an AC duct, to use the others for AC. I'm sure once you pull the furnace, it will all become clear.

If you put "T's" in the ducts to run the AC through, then you have a back-flow issue into the furnace out of the furnace intake. The same in reverse when running the furnace.
I don't think quickiwe wanted to use the furnace duct for cooling, but to exhaust the heat. A portable A/C unit blows cool air out the directional vents at the top but it also has to have an 'exhaust' hose to remove the heat it extracted from the air in the room. If that exhaust isn't vented to the outside, it can't cool the air in the room, actually because of the heat of the compressor and fan motor, you'd have a heater, although a very inefficient one.
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Old 05-25-2013, 10:29 PM   #7
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i tryed one but it well take insdie air and use it to cool the unit and takes that air and push it out side the air that is push out side has to come back in some where else so then it has to cool the new air coming in dos not work to good
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Old 05-26-2013, 07:24 AM   #8
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Originally Posted by BFlinn181 View Post

I don't think quickiwe wanted to use the furnace duct for cooling, but to exhaust the heat.
You're right. After a few re-reads and your post, which I didn't see before replying, I figured that out.
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