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Cold weather heat pump COP

JOutterbridge
JOutterbridge Member Posts: 16
edited December 2023 in A-C, Heat Pumps & Refrigeration
Crazy question here from a commercial tech. I work with Water Furnace and McQuay water source heat pumps all the time and they are very efficient. Recently I've been looking for a non inverter style heat pump for a Northeast residential home. Has anyone ever installed the Ruud/Rheem classic RPZ style units? Technical submittal shows a COP of around 3.9 at 47 degrees. And 3.0 at 17 degrees. Is this really possible with air to air? Feedback is appreciated, thanks. My apologies if model numbers are not allowed:(

Jon O.

Comments

  • pecmsg
    pecmsg Member Posts: 5,254
    If everything is done according to the book...............Maybe!

    Those #'s are ideal set up, like MPG you milage may vary.
  • Zman
    Zman Member Posts: 7,611
    edited December 2023
    Those numbers do seem high. Could you post the document? I am curious.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • GGross
    GGross Member Posts: 1,219
    Why non-inverter? Depending on the model and combination of heads LG red inverter units are capable of COP over 3 at -13f
    ethicalpaul
  • Hot_water_fan
    Hot_water_fan Member Posts: 2,037
    Those pretty typical COP ratings! A non-cold climate heat pump will lose capacity at 17F, but will be efficient. 
    ethicalpaul

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