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Mini split condesate removal

Discussion in 'Residential Mechanical Codes' started by jtom, Aug 25, 2017.

  1. jtom

    jtom Sawhorse

    Dec 21, 2012
    Likes Received:
    I assume the condensate removal code for mini split systems is the same as with other hvac residential equipment.Since mini splits have only a primary drain,a water level detection device is required.Are these typically built into the units or are they added as a retrofit?
  2. north star

    north star Sawhorse

    Oct 19, 2009
    Likes Received:
    & = & = &


    We install a lot of mini-split systems, and a "water level
    detection device" would be recommended "IF", there is no
    capability to have a secondary, gravity fed drain line.
    Sometimes, even a secondary drain is not enough in a lot
    of our applications, because of the lack of regular
    maintenance and the very high probability of algae
    growth in the drain pan.......Also, there are anti-algae
    growth tablets available, but we do not use them. :eek:

    = & = & =
  3. Ty J.

    Ty J. Active Member

    Aug 2, 2017
    Likes Received:
    We've taken an interpretation that because the internal unit is installed outside the envelope of the wall, if the primary condensate drain does plug, the overflow of the pan will result in dripping from the unit which would be immediately apparent to the tenant/owner.

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