中央空调通风管道是专业用于国防及民用建筑的室内空气调节系统，全国年用量1~1.2亿㎡。随着城镇化建设的发展，每年以10%的速度增长。目前市场上通风管道用量为：

The central air-conditioning ventilation duct is an indoor air conditioning system which is used for national defense and civil buildings. The annual consumption of 1~1.2 is 100 million. With the development of urbanization, the annual growth rate is 10%. At present, the amount of ventilation pipe in the market is as follows:

铁皮风管为主要使用产品，占70%左右。

The iron pipe is the main product, accounting for about 70%.

玻璃棉风管、彩钢板风管等占15%左右。

About 15% of the glass and cotton wind pipes and color steel plates and so on.

玻镁风管占15%左右

The glassy magnesium duct accounts for about 15%

各类通风管道优劣性能

Advantages and disadvantages of various types of ventilation pipes

从产品优越性来说，铁皮风管、彩钢板风管存在着锈蚀的缺点，在潮湿的环境下，加速锈蚀速度。有的通风管道的使用寿命只有7年左右，玻璃棉风管强度低、吸水率大，不能用于潮湿环境，不能用于1500Pa以上的高压风管。

From the superiority of the product, the iron pipe and the color steel plate wind pipe have the disadvantage of rusting, and accelerate the corrosion speed in damp environment. The service life of some ventilation pipes is only about 7 years. The glass cotton wind pipe is low in strength and high in water absorption. It can not be used in wet environment and can not be used for high pressure wind pipe above 1500Pa.