Air source to water heat pumps.
The system in its early stages , it has been installed since beginning of November2015.
I have had problems with the pressure vessel maintaining its pressure for the hot water system and this is still being rectified.
Everything on much lower temps but due to good loft insulation the system seems to cope.
You have to be a dead of the game to to keep things warm.
Electricity use is a little frightening , but have had the summer to average things out.
Units per month are about 2500 which include general house needs as well as heating.
Retired out of Farming , but still and need to carry on working, moved to a bungalow with 4 bedrooms that had a wood burning stove in the lounge , supposedly linked to a kerosine boiler, which was inefficient in itself , (the complete system )!