Funny thing about heat pumps. Right now they primarily use refrigerants that have ~2000 times more GWP than CO2. They need to be refilled every 5-10 years. M

Funny thing about heat pumps. Right now they primarily use refrigerants that have ~2000 times more GWP than CO2. They need to be refilled every 5-10 years. My brother had one installed recently. They leaked the entire contents twice due to over tightened connectors. A back of the envelope calculation indicates that his heat pump will emit more GWP gas than if he has just burned natural gas by a wide margin. Recently I recall reading an analysis that half of the heating since the 70s is attributable from refrigerants. So while heat pumps are more efficient from am energy standpoint, with current refrigerants they are not helpful for climate change.