目前我国北方一些地区的一幢建筑物常有空调和采暖两套系统。那么冬季用两种方式供暖各自特点及经济性如何？本文以普通办公楼建筑为基础，对空调和采暖系统选取常见形式作为代表，分别计算出其费用年值。 At present, a building in some parts of northern China often has two systems of air conditioning and heating. So winter with two ways to heat their own characteristics and economy how? This article takes the common office building as the foundation, takes the common form of the air conditioning and heating system as the representatives, and calculates the annual cost separately.