Not all building projects are suitable for Heat Pump systems. The following guidelines are intended to highlight some of the main factors used in determining suitability.
a) The building should be very highly insulated and energy efficient.
This means that new buildings or conversions which are constructed to current building regulations are most suitable.
B) The normal heat delivery system should be designed for lower temperatures
Heat pumps generally have a space heating output temperature of around 45ºC - 50ºC, whilst this is ideally suited to most modern wet under floor systems, radiators need to be sized to allow for a lower input temperature than with traditional fossil fuel heating systems
c) The building plot should have sufficient land available for installation
A typical three bedroom new house built to current building regulations will probably require around 8kW of heating, a suitable  Heat Pump system would require two x 50 metre long trenches  to allow for sufficient pipe work to be placed in the ground. Alternatively two deep boreholes could be installed. Both trench based and borehole based installations require that the ground loops (vertical or horizontal pipe work) should have a minimum separation of five metres.
d) The property should have a reliable electricity supply
Heat Pump systems are electrically driven, a good single phase domestic 240V supply is sufficient to run heat pumps of up to 12kW total heat output. Larger buildings requiring more than 12kW of heating will need a 400v 3 phase electricity supply.