With the rapid development of economy, ventilation duct is more and more widely used in life. For example, in restaurants, ventilation equipment provides customers with an excellent dining environment and makes people eat happily in restaurants. For example, mining in industrial production requires excellent ventilation conditions to ensure the respiratory health of miners. Ventilation equipment has been paid more and more attention. The planning and installation of ventilation duct is one of the important parts of ventilation equipment. Let's take a look at some points that should be paid attention to in ventilation duct planning.

1、首要依据某系统某楼层的通风管道绘制，并注明接口方位。

1. It is mainly drawn according to the ventilation duct of a certain system and a certain floor, and the interface orientation is indicated.

2、 通风管道规划应从起点开端编号。起点一般为接口方位，相同截面规范、相同长度截面编号相同。此外，应按次第编号。便于安排生产建设。

2. Ventilation duct planning shall be numbered from the starting point. The starting point is generally the interface orientation, with the same section specification, the same length and the same section number. In addition, it shall be numbered in order. It is convenient to arrange production and construction.

3、 通风管道规划时应标明支吊架的方位，支吊架的方位距离和材料规范应符合后期规范和工艺规程的要求。

3. The orientation of supports and hangers shall be indicated during ventilation pipe planning, and the orientation distance and material specification of supports and hangers shall meet the requirements of later specifications and process specifications.

4、 在规划通风管道时，首要要考虑弯头和异径管，以满意表里外表同心弯头和异径管长度的要求。

4. When planning ventilation pipes, elbows and reducers should be considered first to meet the requirements of the length of concentric elbows and reducers on the inside and outside.

5、 应标明管径规划方位、弯头方位及管底标高。

5. The pipe diameter planning orientation, elbow orientation and pipe bottom elevation shall be indicated.