A CO2 heat pump employs carbon dioxide like a refrigerant. Carbon dioxide can be a The natural way happening gas, and it's a really low boiling level. This paper has investigated the Houses from the hydrocarbons propane, propene and isobutane and as opposed them to R22, R134a and ammonia. Extra https://hydrocarbon-heat-pumps44321.articlesblogger.com/40120135/the-best-side-of-co2-heat-pumps