We have just completed 2 luxury properties at Lansdown in Bath which have had air to water heatpumps, rainwater harvesting, solar panel and underfloor heating.

These are exceptionally eco-friendly homes, and as the smart house buyer knows; eco-friendly means economy friendly.

The homes have underheated floors fuelled by a pump which extracts heat from the outside air and transfers it to the hot water circuit – meaning that the owner can switch the heating on in autumn and leave it to run 24/7 until the spring.

Wireless digital thermostats allow each room to be individually controlled, while the latest levels of insulation keep heat loss to a minimum.

Lighting throughout the house is low-energy LED, rainwater from the roof is directed into a underwater tank to harvest natural resources.