I've been reading the forums on and off for many months now. And I have a quiet reflection...
There seems to be a great difference in heat pumps both technology and trust, between Sweden and most of US.
Just for comparison I'll put in some data from heat pumps in Sweden, used in Swedish (cold) climate:
Since recently heat pumps for domestic use are sold and installed as full coverage - No additional heating source. The COP is currently well above 4.
(COP>4.2 according to testing standard EN14511 and/or EN255)
When I read the debates on theese forums, I get the feeling that heat pumps in the states are:
1. generally not as competitive (compared to data above)
2. Mostly considered a alternate (not as reliable) heat source
Am I totally off? I don't mean to offend anyone but I'd really love a clearer picture on this topic!