Talk to Korrie's (01847 895826). We had air/ground souce heating put in by the council when I lived in Castletown. I firmly believe the system they put in was wrong as our electricity bill all but trebled. The actual thing sitting in the garden was made by Nimby, the systems the council puts in now are Mitsubishi, and they might be better, but I honestly don't know, we moved because of it. It was Korrie's that installed our system on behalf of the council, and they installed some recently in Melvich where I am now, so it's worth phoning them for advice.
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