Environment House, home of the New Zealand government department responsible for environmental issues, has been rated the country's most energy efficient office building. According to a report posted by Scoop, an independent audit has shown that Environment House's energy consumption is only 40 percent of the average energy use of similar buildings in New Zealand. Environment House currently uses 113 kWh/m2 per year, compared to the New Zealand average of 269 kWh/m2 per year for office buildings. The lower consumption means that the Ministry spends approximately $100,000 less per year on energy compared to the average building of the same size. The report says Environment House was not designed as a 'green building' but energy consumption has been kept low through a careful selection of building materials, roof insulation, sensor lights, smart systems for appliances and air conditioning, and a high awareness of energy efficiency among the staff.