目前,多数城市仍以燃煤作为取暖的主要方式。我国建筑能耗产生的二氧化碳排放量已经占到全国用能排放量的1／4。与气候条件接近的西欧或北美国家相比,我国住宅单位采暖建筑面积一般要多消耗2～3倍以上的能源。2002年,全国空调高峰负荷已达到4500万千瓦时,相当于2．5个三峡电站建成后的满负荷出力。 At present, most cities still use coal as the main means of heating. China's building energy consumption generated by carbon dioxide emissions have accounted for the national emissions of 1/4. Compared with the climatic conditions in Western Europe or North America, compared to China's residential heating construction area generally consume more than 2 to 3 times more energy. In 2002, the national air-conditioning peak load has reached 45 million kwh, equivalent to 2.5 after the completion of the Three Gorges Hydropower Station at full capacity and output.