建筑业是美国经济的支柱之一,相应地,建筑耗能在美国能源消耗中也占重要比例。据统计,近年来美国住房每年消耗的能源折合约3500亿美元。美国的建筑有其独特性。美国人口约2.5亿,近2/3的家庭有自己的房屋,人均住房面积近60平方米,居世界首位,其中大部分住宅都是3层 The construction industry is one of the pillars of the U.S. economy. Accordingly, building energy consumption also accounts for an important proportion of U.S. energy consumption. According to statistics, in recent years, U.S. homes have used energy contracts worth 350 billion U.S. dollars annually. The architecture of the United States is unique. The United States has a population of about 250 million. Nearly two-thirds of the households have their own houses. The per capita housing area is nearly 60 square meters, ranking the first in the world, and most of the houses are three floors.