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  1. #1
    Join Date
    Nov 2011
    Posts
    53

    Mini-split condensate hack

    Of course this is Wall of Pride in my heart, but I don't dare post it there!

    Here in Shenzhen it is easily 100 degrees everyday, so I figured this little AUX ductless mini-split could use all the help it could get.

    The condensate line has a series of holes in it and it is mated to the coil with just normal cotton held on with some twist ties. Condensate flows down the coil perfectly... no dripping or mess.

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  2. #2
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,147
    Looks like the coil needs to be cleaned. That water trick will work good until the coil rots out in that section.

  3. #3
    Join Date
    Nov 2011
    Posts
    53
    Not sure why that would be... it's a heat pump and wet all winter.

  4. #4
    Join Date
    Apr 2011
    Location
    Coastal Maine
    Posts
    819
    Jim, the pH of condensate is on the acidic side of the scale. Over time, it could start to eat away at the fins. The amount of time required to do that would depend on a whole host of factors. But it is possible.

    In some areas and in extreme applications, condensate neutralizers are required to raise the pH of the condensate prior to putting it into the sanitary sewer system.

    On a little minisplit, this might not be the case, but it is theoretically possible.

    Just a little FYI.

  5. #5
    Join Date
    Nov 2011
    Posts
    53
    Thanks for the heads up.

    But I think there are quite a few examples of this being done in window shakers etc and the coil is covered in condensate all winter without being effected.

    The coil is clean, but I think maybe a bit corroded.

    (And it's old and new ones are cheap...)

  6. #6
    Join Date
    Nov 2005
    Posts
    150
    Quote Originally Posted by meplumber View Post
    Jim, the pH of condensate is on the acidic side of the scale. Over time, it could start to eat away at the fins. The amount of time required to do that would depend on a whole host of factors. But it is possible.

    In some areas and in extreme applications, condensate neutralizers are required to raise the pH of the condensate prior to putting it into the sanitary sewer system.

    On a little minisplit, this might not be the case, but it is theoretically possible.

    Just a little FYI.

    I thought those were only required for furnace condensate?

  7. #7
    Join Date
    Nov 2011
    Posts
    53
    Air conditioning condensate is just distilled water.

    Schools tapping A/C condensate to top off cooling tower

  8. #8
    Join Date
    Oct 2009
    Location
    Florida
    Posts
    168
    Not just water, condensed sweat, alcohols, VOCs, etc.

  9. #9
    Join Date
    Jun 2009
    Location
    northern Ohio
    Posts
    135
    We had a old lady who always put her watering can under her air handler drain line that ran down side of home. She used it to water her plants and said it was the best water ever for this. I don't know her reasoning but she did have a beautiful yard

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