End of ground source with R290 monoblocks?

[BigBarney]

That there R290 sounds good but I haven't seen it said that it can be reversing for cooling. I also wonder how it compares efficiency wise to CO2 (same question about reversing).
Any insite?

John

So far as I know there are no reversing valves (residential) for CO2...

 

[ruralsolar]

So far as I know there are no reversing valves (residential) for CO2...

Availability will be the question but if an OEM in China is making them it's only a matter of time for them to be available

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