As with other ZED buildings the first objective was to reduce the energy the buildings consumed by super insulating the envelope and high air tightness. By this method the size of mechanical services was reduced so the whole development only required a 75 kW wood pellet boiler for all its heating and hot water needs. Other systems such as solar hot water panels and the use of low temperature under floor heating helped the specification of such a small boiler. The wood pellets were sourced locally and a large pellet store meant only one delivery per year is needed. The same principles reduced water consumption by using low usage tap and shower fixtures. All electrical items were specified on their energy rating so that all white goods, such as fridges and cookers were electrically ‘A ‘ rated or better and only low energy light fittings were used. By this reduction the four 6 kW wind turbines provide the majority of the electricity the site requires during the course of a year.