Quote Originally Posted by ZZ Jack View Post
I have a couple of Air Source Heat Pumps which are fairly inexpensive to run, and still work when the outside temp is -4C 25 F. About Ł800 for the pair for a DIY fit. They have a COP of about 2.4 when the temp drops below 0 C, so 1 Kw in gives 2.4 Kw of heating.
Yeah I have been surprised at how cheap they are to run. Getting used to planning when you want to draw the energy has been anpther thing. It took me two weeks at Christmas to get the system set up. It also took the house a long time to get warm initially and running the heat pump continually seemed scary at first.