Heat gains from lighting, fridge, freezer, cooker and other appliances come to about 2900 kWh/year, provided that the most energy efficient appliances available in the market are used.

• 假如市场供应的大多数节能设备都得到了利用的话，照明设备，冰箱，制冷器，灶具和其它装置提供的热量可达到约每年2900瓦。