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motc777's avatar
motc777
Explorer
Jul 25, 2016

Questions on installing second AC

Our Fifth Wheel only came with one AC, that is thermostat controlled. Needless to say, it's not powerful enough on it's own to keep this place cool during Texas summers.

I've watched some videos online about installing a second AC. It would not matter to me if it hooked into the existing ducts or not. What I have seen is that you can put them in place of an existing skylight.

In the main bedroom of the coach, we have a skylight right above the bed. However, when you view it from the topside, looks rather close to the front edge of the coach. Would we still be o.k. to install one, like for example, a low profile one or would we need to move back some and cut a new hole in the roof? Thanks!

26 Replies

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  • Jim-Linda's avatar
    Jim-Linda
    Explorer II
    Jul 26, 2016
    Dick_B wrote:
    Are you sure you want an A/C above the bed? That's white noise to the extreme!


    Never saw a front bedroom with AC that wasn't above the bed.

    Jim
  • Dick_B's avatar
    Dick_B
    Explorer
    Jul 26, 2016
    Are you sure you want an A/C above the bed? That's white noise to the extreme!
  • wvcampers's avatar
    wvcampers
    Explorer
    Jul 26, 2016
    If there is a breaker in the breaker box labeled 2nd AC then you will have an easy job. The wire for the 2nd AC will be in the area of the bedroom roof vent. It could be in a electric box with a blank cover on it or it could be like mine, when you remove the trim for the roof vent you will see it. Remove the roof vent. The AC will sit over the hole. The hardest part is getting the AC unit on the roof.
  • jimmyfred's avatar
    jimmyfred
    Explorer
    Jul 26, 2016
    ..........You might also consider an inside unit that exhausts the hot air out through an existing window ! They come in several sizes , but I wouldn't buy anything less than a 12,000 btu. The cheapest way is to simply install a window unit if it will fit into any of your exist openings . A place called Air and Water sells several brands of the inside units , they will run from 400 to 600 depending . , jf
  • BB_TX's avatar
    BB_TX
    Nomad
    Jul 26, 2016
    Look next to that bedroom vent/skylight and see if there is something that looks like a blank cover for an electrical box. Remove that cover and see if there are electrical wires there. If so, you are probably good to go for electrical connections. If no existing wires I don't know how you would ever get them there.
  • GPG52_'s avatar
    GPG52_
    Explorer II
    Jul 26, 2016
    My 2c worth.
    All of the AC's that I have had installed or seen others install all go into the existing roof vent (which I believe is what you are referring to).
    What is most important is to make sure you have an electrical outlet beside the vent to accommodate the AC installation. This pre-wire should also give the required electrical fuse/tripper in your fuse box.
    Personally I would have it professionally installed vs. a DIY job.
    GPG :-)

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