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Thread: Mitsubishi Mr. Slim opinions

  1. #1
    DIY Junior Member
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    Dayton, OH
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    Default Mitsubishi Mr. Slim opinions

    I am adding a 30x16 family room addition and 20x20 master bedroom suite.
    We keep our bedroom very cool, even in Winter, but prefer a warmer family/tv room. We are in Ohio, so winter can get cold and I understand that heat pumps are not effective at 18 degrees or less, so my thought was to supplement with a vent free gas fireplace for colder days (99% effficient). Essentially we are adding two "zones" to heat/cool, with each zone having it's own independent unit. has anyone had experience with the Mr. Slim products, and has it been favorable?

  2. #2
    Previous member
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    Good product

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    There are some byproducts from combustion with a vent-free unit. It consumes O2, and produces CO2 and H2O, with various other gasses, depending on how clean it burns and the exact composition of the gas feeding it. In a tight house, it's not the greatest thing. A small one for atmosphere that doesn't run forever is another thing.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    Plumber jimbo's Avatar
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    In your climate, heat pumps are of limited use, and most installations of a heat pump would have back up electric strip heat, which is not an option with the minis.

    I would consider some heat sources ( other that ventless gas....don't like that idea at all!)

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