When Ray built the large extension on their house he wanted a comfortable but very efficient building; he chose high thermal standards for the thermal block walls and Argon filled double glazing with low-E glass. The flat upstairs is so well insulated that it only requires 1kW to heat it on the coldest days. A 35kW wood pellet boiler with hot water storage tank warms the house, and a system to divert excess generated electricity to heat water (ImmerSUN).
Ray is an electrical engineer and inventor, developing energy-saving technology with his company, Acrogen. He uses his home as a test-bed for ideas, with several energy-saving schemes which he seeks to improve. A 10kWh battery backup operates at 48V, and he is developing a DC48 electrical and data supply network which will be installed in the house, to store and distribute the electricity from the solar PV panels. Smart switching allows them to use their generated power to the maximum. Ray is full of ideas and a font of knowledge about ways of reducing energy loss and of generating electricity. He has detailed figures of the savings achieved in five years of photovoltaic panels and two years of a wood pellet boiler
Westfield House is a glimpse of the future.