Splod wrote:
I've also got a heat pump, had it for 5 years in my new build. They work well in a well insulated, airtight house ie no draughts. Its a different way to heat your home with the heating on most of the day so its a very good living environment. They are expensive to install and run as electricity is 3 times the price of gas so the logic of getting 3 times the heat for each unit of electricity doesn't make any saving financially. I saved by not having to pay for a gas connection and I get the Renewable Heat Incentive, a quarterly payment for 6 years. Thats now been replaced by capital grants. Some electricity companies have special heat pump tariffs that include 6 hours of off peak half price electricity for those with heat pumps, though its 50% more expensive 4pm to 7pm. The Climate Change Committee are advising government to switch environmental tariffs from electricity to gas supply. If they do that the running costs of heat pumps will improve.
However, I wouldn't recommend heat pumps for houses with poor levels of insulation, draughty houses or houses with no inside space for the heat store tanks and control systems that come with heat pumps. Its the technology of the future but a lot of the UK housing stock isn't suitable without expensive retrofit.
Basically the costs are made up by grants paid by the taxpayer , Also if they make gas and electricity more expensive the heat pumps will be cheaper obviously. The first 3 lines of your last paragraph sums it up, not many houses would be suitable for one.