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  1. Boston_John

    Undersized Mitsubishi mini-split condenser (5C42NA2)?

    Hey guys, thanks for the replies, and thanks for the side note fitter30, I appreciate it. I've been offline enjoying the summer a bit and missed the replies. Now that it has cooled down I'm going to talk to the installer again and see what we can come up with. I'm still of the impression that...
  2. Boston_John

    Undersized Mitsubishi mini-split condenser (5C42NA2)?

    Bumping my thread as I'm still not sure what to do with my setup. Any help greatly appreciated!
  3. Boston_John

    Undersized Mitsubishi mini-split condenser (5C42NA2)?

    All doors new in 2018; 75% of the windows are new in 2018 as well (Marvin casement) with the remainder Andersen 400s installed about 15 years ago. All are in excellent shape with maintained weather stripping. The square footage is approximately 2800, although about 350-400 of that is part of...
  4. Boston_John

    Undersized Mitsubishi mini-split condenser (5C42NA2)?

    Some updates: The installer said that it is acceptable to size the indoor units up to 130% of the outdoor capacity, so in my case, this would be imply a ~55k of capacity. This is based on the expectation that not all units will require full capacity simultaneously. However, now that I look...
  5. Boston_John

    Undersized Mitsubishi mini-split condenser (5C42NA2)?

    Long time reader but first time poster. I'm hoping to get some of your excellent advice to talk with our a/c installer about what I think is an undersized condenser unit and a related question about a wall unit. Part 1: I have an MXZ-5C42NA2-U1 (42k BTU condenser) to support the following wall...
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