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@Nahguavkire
Dimplex LAK 10 M
Extremely compact Dimplex air-to-water heatpump. If you have any sort of garden/flat roof space whatsoever you could put one of these in and it will probably do all of your heating and hot water needs for most normal urban houses. You'd be surprised how good air-to-water has gotten. It was always seen as inferior to ground source heatpumps due to lower COPs but at the moment Dimplex air-to-water heatpumps have a higher COP than that of their groundsource models. Also the lack of ground collector makes them very attractive indeed for people who have limited space. Currently though you're looking at COP of 3.5/ 4.5 roughly speaking on a heatpump compared to at very best 0.92 on a gas condensing boiler. In plain Engrish, for every 1kW of paid for energy/fuel you put into a boiler your best return will be 0.92kW of heat. With a heatpump it will be 3.5/4.5kW for every 1kW spent.