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  1. #1

    Mini Split Cool Master Suite?

    Live in Charlotte, NC...hot, humid summers and relatively mild winters.

    We are putting on a 350 sq ft master suite addition with bedroom(~200 sqft), bathroom(~100 sqft) and closet. The space is a 21' x 17' rectangle and there is a partition wall with a pocket door on either side opening off the main room into the bathroom and closet. Bedroom has a vaulted ceiling.

    We plan to use a combination of radiant floor heating and a ductless mini-split unit for cooling. We plan to have a Manual J done before determining the final size of the cooling unit (probably 9K of 12K Btu).

    My question is will a single unit properly sized and positioned in the bedroom be able to cool/dehumidify the bathroom effectively as well? Right now the plan is to position the mini-split unit high up on the partition wall. Will a higher CFM unit be more likely to cool/dehumidify well?

    Any advice and suggestions would be greatly appreciated.

  2. #2
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    They make mini splits that have 2 indoor units and 1 outdoor unit. That would be better. With no air flow in the bathroom (with a single indoor unit) it would be hard to condition the both bathroom and bedroom with a mini split
    Remember, Air Conditioning begins with AIR.

  3. #3
    Join Date
    Aug 2007
    Location
    MN
    Posts
    2,677
    most of your time spent in the bathroom is less than fully clothed, therefore needing less cooling, but it is possible you may want the dual head minisplit, you can always leave the bathroom one off if not needed. But it is less costly to do it up front and not use it than to do it later.
    You can't fix stupid

  4. #4
    If we use a system with duel indoor units we are looking at least 18K Btu. Isn't that extreme overkill for 350 ft sq and wouldn't the unit in the bathroom (~100ft sq) short cycle and fail to dehumidify properly?

  5. #5
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,919
    The Mr Slim brand has inverter technology so compressor capacity varies with the load. Look at it.
    Remember, Air Conditioning begins with AIR.

  6. #6
    Join Date
    Dec 2006
    Location
    Arkansas
    Posts
    292
    Fujitsu has a cassette model that allows you to run a small duct off to an adjacent room to provide heating/cooling. They are also introducing some new models in 2008 that will have other capabilities.

  7. #7
    Thanks to everyone for the responses.

    dcmcm5 - Do you have any more information on the Fujitsu model you mentioned? That sounds like exactly what we are looking for.

    Kevin O'Neal - Thanks for the mention of the inverter models. We will definately use this type if we wind up with a dedicated unit in the bathroom.


    We were considering the LG Art Cool models because we are not very fond of the look of the air handlers on the wall. But, LG does not seem to make the best units and the frame type we like is not an inverter model.

    Ideally, we would like to use inverter models where the interior unit(s) could be recessed into walls or ceilings. I have seen the ceiling cassettes, but they seem to be for larger spaces.

  8. #8
    Join Date
    Dec 2006
    Location
    Arkansas
    Posts
    292
    Go to www.fujitsugeneral.com. You will find information about the units there as well as contractors in your area.

    These are also inverter models that are very efficient, quiet, and do a great job as many of the mini-splits do.

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