Forum Discussion

Buzzcut's avatar
Buzzcut
Explorer
Mar 21, 2019

Much of a difference between 13,500 or 15,000 BTU A/C?

I’m getting ready to add a second A/C to our t/t that came equipped with a 15,000 Dometic unit. It worked fine but it did get a little warm last summer when we went away for two weeks. Looking to either go with the 13,500btu or 15,000btu Dometic Brisk Air 2. I’m putting it in the bedroom and it will have its own dedicated line. Cost isn’t a factor but I was just wondering if there really is a noticeable difference in cooling. TYIA.
  • pianotuna's avatar
    pianotuna
    Nomad III
    Mar 21, 2019
    The 15 K is 10% more cooling. I'd stay with the 13500. I would use #10 wire for the install. I'd even consider dropping the size down to 11000 btus. I'd also consider a heat pump unit.

    In many older campgrounds the pedestals only have 15 amp "additional" outlets. That makes running the 15k unit "iffy".
  • Cummins12V98's avatar
    Cummins12V98
    Explorer III
    Mar 21, 2019
    If the wiring is already there it most likely is 12ga 20A so go for the bigger one it will not have to work as hard. If adding run 12ga and 20A breaker.
  • ford_truck_guy's avatar
    ford_truck_guy
    Nomad
    Mar 21, 2019
    My thinking would be to go with the 15k... When 2 are not needed, you could alternate which one is used to possibly prolong the life...

    If cost is not an issue, thats my choice

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