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Old 08-05-2016, 12:44 PM   #1
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Adding a Second AC unit

Im not sure if I filled out my signature correctly, I have a Sand Piper 345QBQ.
The master bedroom gets really warm in the summer.
Im looking to add a second unit, I'm thinking of using a duct less unit, I would run the power supply from the breaker panel up the demising wall of the bedroom then use wire molding or make something to cover the wire on the ceiling. The pre wired location is in the front where the bunks are and that area is like a meat locker.
Has anyone done something like this? I have a construction background, but have limited knowledge of RV AC add on's.
Any help would be appreciated.
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Old 08-05-2016, 12:46 PM   #2
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Do you have a 50 amp plugin?
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Old 08-05-2016, 12:51 PM   #3
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Yes I do it was pre wired for two units but only came with one.
I just don't need the extra cooling in the front of the unit.
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Old 08-05-2016, 12:54 PM   #4
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Quote:
Originally Posted by Eatern Shore View Post
Yes I do it was pre wired for two units but only came with one.
I just don't need the extra cooling in the front of the unit.
Then you should be good to go on adding.
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Old 08-05-2016, 02:12 PM   #5
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If you have a roof vent in the bedroom you can replace it with an air conditioner. It's fairly easy to run wire in the attic.
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Old 08-05-2016, 02:44 PM   #6
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I would be concerned about framing to support the weight of the AC unit.
I have never added one to a camper but it seems like a logical concern.
Have you considered trying a circulating fan to push the cool air to the hot area?
If your luck is like mine cool weather will arrive as soon as you complete the installation.
Good luck with it.
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Old 08-05-2016, 02:45 PM   #7
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I am curious about this too. My Sierra 32QBBS is prewired for a 2nd A/C unit in the front where the bunks are and it is a meat locker. However the rear bedroom is warmer than the rest of the camper. It is ducted a/c with ducts run into the rear bedroom and has a skylight. However, there it isn't prewired there. Mine also has 50 amp hook up.
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Old 08-05-2016, 03:53 PM   #8
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A/C Mod

Consider this A/C mod. Several have done it and are very happy with the results.

Increase ac vent air flow by 75%
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Old 08-05-2016, 03:56 PM   #9
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I pulled all my ceiling vents in my trailer and found that with low quality cardboard ducting 2 had a space around the ceiling fitting into the ceiling area and the ducting went on past the last outlet to who knows where. I took some Duct tape and some cardboard and taped up the holes and ended the ducting right at the fitting. It seems to have added something to the airflow.
Also I intend to get into the unit on the roof (using a visiting son-in-law as the worker. ��) and do some efficiency work up there as in one of the forums. I also found that the piece of material separating inflow and outflow allowed too much air straight from out to in. Fixing these sorts of things makes a difference.
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Old 08-05-2016, 03:58 PM   #10
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If your unit is prewired for the second A/C then the power wiring is already in the ceiling at the vent opening. Also, the bracing is already in place for it as well.
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