The Minus 7 Energy Harvesting System is a renewable energy system that harvests both endothermic and solar energy. It provides hot water and heating for homes and is suitable for new build or deep refurbishments.<br> <br> It is comprised of an endothermic roofing system, a solar energy processor and a large thermal store. It is designed to keep a five bedroom house at a comfortable temperature of at least 21°C even in the worst case scenario of mid-winter, Minus 7 says. However the system is capable of servicing up to three dwellings at once making it highly suitable for housing associations, it claims.<br> <br> Minus 7 is UK manufactured. The roofing component is expected to last for in excess of 50 years and the solar energy processor will last in excess of 20 years, Minus 7 says. All components are fully recyclable at end-of-life. Minus adds that the system delivers very low running costs and carbon emissions of less than 180g of carbon per kW of heat delivered.<br> <br> <a href="http://www.minus7.co.uk">www.minus7.co.uk</a>