There are no great losses in creating water this hot with a gas fired boiler but such temperatures would kill the performance of a heat pump. It is possible to reduce the water temperature while maintaining room temperature with very large conventional radiators or fan assisted water radiators ...
I started with insulation and CFL's and invested the cumulative savings in a high efficiency boiler. I then took these savings and bought a solar water heating system that supplies 70% of my domestic hot water. I am subsequently investing in two community based wind farms. I am also investi...