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Thread: ruud fancoil

  1. #1
    Join Date
    Dec 2000
    Location
    topeka ks
    Posts
    112
    what is the differance between a ubhb-25j21 mfea and ubhb-25j18 mfea. what size coil is in it and is a piston or txv inside.

  2. #2
    Join Date
    Mar 2004
    Location
    Grottoes VA
    Posts
    5,856
    The 21 is 21kw of heat and the 18 is 17.5kw of heat.

    Both have 5 ton coil with TXV
    Karst means cave. So, I search for caves.

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