Here in England we heat by pumping fairly hot water through metal radiators, heated by gas or oil. A heat pump produces only lukewarm water at a slow but effici

Here in England we heat by pumping fairly hot water through metal radiators, heated by gas or oil. A heat pump produces only lukewarm water at a slow but efficient rate. It is really hard extract the heat out of lukewarm water into a room, often the typical UK room loses heat faster than you can get it out of the water. (Hot water heats the room much more easily). As such the early adopters of heat pumps have expensive items that barely heat their houses and when they try to get more heat out of them in a hurry they become very inefficient. There is almost no domestic air conditioning industry. On the rare occasions it gets too hot we open a window and thank the Gods. Thus there are very few cheap and reliable domestic suppliers of air conditioners for heating. And the air heating ones are tarnished by our experience with the unsuitable water heating ones. So we burn oil/gas or electric storage heaters... Achieving a 300% efficiency and actually being able to heat a poorly insulated UK room just sounds too good to be true.