I would highly recommend that you don't have a ground source heat pump fitted to the property as they do not work. I have just had one fitted and was told the system would heat the whole house and my hot water in the house. The sytem heats the ground floor of the house so most of the house is cold. the system only heats upto 30 degrees so the hot water will never be warm enough to use for showers or baths. We are dependant on an imersion heater in the hotwater tank which is expensive.

The sytem is more expensive to run than gas and the hidden instalation costs are massive. Extra plumbing electrical instalation and ground work over all this came to over £2500. This does not includ the fitting of the sytem to the underfloor heating and ground loop.

Lee