25 States Agree To Quadruple Number Of Heat Pumps In America::The US Climate Alliance met in New York City this week to explain the benefits of heat pumps, including better health for American families.
25 States Agree To Quadruple Number Of Heat Pumps In America::The US Climate Alliance met in New York City this week to explain the benefits of heat pumps, including better health for American families.
Direct electric heat is very efficient. Practically 100%.
My understanding is that you would only need the aux source during extreme cold. So very rarely.
My heat pump is around 300% efficient. It adds 3X the energy into the house than it spends by stealing that energy from outside.
Except when it’s very cold outside, which is what was discussed here. Heat pumps are great (have one in my home), but it might not be ideal in very cold areas, especially if electricity prices are high compared to other energy sources.
You need to be in a very, VERY cold area for that to matter. While these places exists, I’m sure it’s not the case for a lot of the states I’ve seen marked in that article. Heat pump can heat the inside of your house even when it’s freezing outside.
What do you consider “extreme” cold?
I don’t know. It’s a curve though, not a cutoff.
Icing conditions can also be a factor; freezing rain in the high 20’s F (~-4C for those who can’t F) will build up a layer of ice on the outside unit especially since it’s already the coldest thing around. That ice prevents air from circulating through, so it loses effectiveness. Running the strips for about a half hour or so, then running the air conditioner for about a half hour will defrost it quite effectively and restore it to efficient operation. It is my understanding some systems even do this automatically.