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air to water heat pump

Hey all, anyone come up with a air to water that you really like. Have you installed many, just looking at reliability.
Thanks in advance


  • pecmsg
    pecmsg Member Posts: 2,214
    what exactly are you trying to do? 
    Air to water chillers are common. Air to water heat has limitations. 
  • hot_rod
    hot_rod Member Posts: 14,868
    Not a lot of track record to be found yet, Canadian manufacturers seem to be leading the pack with ccA2WHP offerings. Try Eden Energy or other distributors for some feedback, maybe
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • kcopp
    kcopp Member Posts: 3,784
    Spacepak has a set up. As w/ all of them now they do have limitations.
  • tim smith
    tim smith Member Posts: 2,389
    Sorry all about slow to responding. I have looked at the 3 versions of Spacepak, Nordic, and a few others. Dug through what ever specs I could find. I think the Spacepak Sim unit is the closest I find to fit temp requirements here in NW. I just don’t like being beta tester early on, been there done that. It’s really nice when you can get a mfr to let you be an early tester and provide some support while vetting their equipment. Many years ago I was given a early beta prestige boiler when they were switching from MCBA to trimax control. My boiler had both trimax and mcba displays on it, looked pretty funny. Worked well although.
    Thanks for response all.
  • hot_rod
    hot_rod Member Posts: 14,868
    John Siegenthaler has been running a SpacePak Soltice at his office for several winters now. Up above Utica, NY where temperatures fall well below 0 for days and maybe weeks 

    Look at Caleffi Idronics 25 and 27 for info on proper applications and best operating conditions. Probably see pics of his systems in those issues😉
    He used another A2whp on his daughters home nearby.
    properly applied they run very efficiently. Check back in 20 years for longevity, maintenance or repair costs.

    That hours of occurrence data from ASHRAE and others is the best way to predict how efficiently the HP will operate at your location. Low SWT are the key to best operating efficiencies. That is important to deciding how well it will perform in your application.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream