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CO2 Heat Pumps

Heat pumps with CO2 (carbon dioxide) as the working fluid instead of conventional refrigerants have been used extensively in Japan for the last 10 years and in Europe for the last 5 or so.  They can output 190 degree water for use with DWH or could be used with radiators for hydronic heating.  I would think that they would also work wonderfully as a geothermal heat pump.

I have tried to find a source for them in the US but haven't been able to.  Does anyone out there have any suggestions?


  • Techman
    Techman Member Posts: 2,144
    edited March 2011

    Hi Bill,I beleave Copeland has a new comp on the market that uses CO2
  • EddieG
    EddieG Member Posts: 150

    was an article in the RSES magazine a couple of months ago on CO2 systems. As I recall multiple manufacturers have compressors out there or are testing. The article seemed to give them good reviews with high efficiency. I'll see if I can find it and post a link.
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