quentingargan wrote: »
Does anyone have experience of these? Because you are only bringing the exhaust air up to 20 to 23 degrees, the claimed COP is 6. I have ducting for heat exchange ventiliation, and I was considering abandoning this system and using the ducting for an air to air heat pump.
18 year old straw bale house - well enough insulated, though modern houses now would have a better BER rating.
Any thoughts on this would be appreciated.