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  1. #1
    Join Date
    Nov 2005
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    I have had two different HVAC contractors come to my house and quote me on installing a 9,000 btuh, cooling only Mitsubishi mini-split.

    This will be installed in a basement home theater. The inside unit will be installed at ceiling level putting it right at grade.

    One contractor wants to drill a hole through my slab for the drain and the other contractor wants to put in a condensate pump. I have a deep sink in the basement about 20 feet from this room and a pump there to drain this sink. I am not whether the condensate pump on the mini-split will pump into the deep sinks or directly outside the house. I failed to ask the contractor before he left. I do live in a cold climate, outside of Rochester, NY.

    My house has excellent drainage. In fact, I have a sub pump pit that has never had a pump in it and never even a drop of water. My high efficiency Lennox Pulse furnace has its drain going through the slab.

    What are the pluses and minuses about these two drain methods? Can a mini-split be drained directly outside? Are there other drain methods?

    [Edited by hendersond on 11-12-2005 at 09:21 AM]

  2. #2
    Join Date
    Feb 2004
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    if draining it outside is feasible, by all means do it. one less part to break down.

  3. #3
    Join Date
    Feb 2003
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    No condinsate during the winter so why worry about it.

  4. #4
    Join Date
    Mar 2005
    burlington county n.j.
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    go outside if high enough or go into slab, pump as last resort. if sump pump pit has collector pipe around basement you could drill into that.

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