Pegasus Bay Primary School
Pegasus Bay Primary School, which opened in May this year in Christchurch, is perhaps the most ambitious schools project, with 560m2 (or 90kW) of photo voltaic panels on its roof. The array should be enough to make the school net zero energy, meaning that it generates as much energy as it uses. The school is connected to the grid, so power produced on school holidays actually earns the school money. The electricity is used for lighting, computers and to power the efficient air-sourced heat pumps for underfloor heating. In addition five highperformance solar hot water systems provide the children and staff with hot water. The low maintenance, closed-loop, drain-back hot water systems are designed to last thirty years and serve utility/ toilet clusters and kitchens in each block. Roger Hornblow, Pegasus Bay School Principal, says: “These children will have a new understanding of sustainability and eco-efficiency from attending Pegasus Bay. Our net zero energy school will educate our pupils and community about acting responsibly for the environment and their future. The efficient building methods of the school complement the solar electric panels which generate about $20,000 of power a year (at 18c/kwh) and reduce carbon emissions of Pegasus School by nearly a 30 tonnes/year CO2 per year. As well as the improved indoor environment benefits from natural ventilation, underfloor heating, solar control and good natural daylight, these energy efficient features and solar electric generation should achieve an anticipated payback on the additional investment of about twelve years.