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Old 06-12-2016, 02:00 PM   #1
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2nd AC unit

We have a one year old XLR Thunderbolt 340x12.

When we purchased we were told the unit had one AC and an extreme weather package and would keep everything cool in the summer. We have come to find out we need the 2nd AC. One unit runs continuously and doesn't really cool until 1am. With it running all the time we've added fans to try and help and with all the noise you can't hear a thing.

Here's my question, has anyone purchased a portable AC to use to help cool? My camper is wired for a second AC it's just more expensive.

Anyone have the same problem and have a solution? Thanks.
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Old 06-13-2016, 11:37 AM   #2
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The only real problem with a portable unit is where to exhaust the hot air. You'll need some where to route the hot air duct.

Most RV windows aren't really conducive to that configuration.
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Old 06-13-2016, 12:48 PM   #3
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Good point. It would be a pain.
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Old 06-13-2016, 02:24 PM   #4
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Check around on-line for a second AC. On my previous 5er, I added a second 15k unit myself. Was pretty simple with the help of a bobcat to get the unit on the roof. Think I spent $800 total for the roof unit and inside ceiling assembly, ducted. Mine was pre-wired for second AC.
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Old 07-28-2016, 11:32 AM   #5
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I had a similar challenge. The single ac in the 29hfs sometimes needs assistance. I found a 10,000 BTU in lowes $300. I figure can use it when needed, plug it in separately via an extension cord and exhaust it with a modified vent to the rectangular vent built in the camper in the back toy hauler bedroom.
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Old 07-28-2016, 12:06 PM   #6
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I just purchased a Dometic 13.5 on eBay for $500. The unit is new, in the box and from a dealer. I will install in my TT bedroom as a second AC.


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Old 07-28-2016, 12:20 PM   #7
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That's a great deal......jburr. My concern is that the 30 amp service will be exceeded with,the second unit. With the second portable ac the unit would be plugged directly to the power source bypassing the 30 amp issue. I have had troubles with just keeping,my breaker from tripping with the ac on and the water heater on electric. I usually have to use propane for the water heater to keep the breaker from tripping. These toy haulers should automatically come in 50 amp service and a 2nd ac unit. I always have to supplement the cooling with the smaller tower fans to keep air moving.
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Old 07-28-2016, 12:53 PM   #8
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You're right about the 30 amp service, my travel trailer came with a 50 amp service and prewired for the second AC.


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Old 07-28-2016, 01:24 PM   #9
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I added a second 13.5k to my 30 amp camper.
Ran the wire through the ceiling and down an interior wall into the basement.
There I installed a breaker panel and then ran the wire to the side skirting and put in another 30 amp receptacle.
I then plugged the main camper into the 50 amp service with a dog bone.
The other cord went to the 30 amp receptacle.



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Old 07-28-2016, 02:08 PM   #10
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Turbs...that's creative!
Is there a cut out in the back for another unit or did you install from scratch?
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