ReddBert t1_jefhjpp wrote
Reply to comment by wwarnout in Heat Pumps could supply 20% of building heating by 2030. Supercritical CO2 heat pump sales in Japan have now reached a total of 8.5 million units. by DisasterousGiraffe
Greenhouse factor of 1 (by definition), which is much better than current fluids (propane is coming up, which has a factor of 3 which is very good compared to the other fluids).
It is non-flammable and can be used indoors (unlike the above mentioned propane).
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