安装通风管道时，需要按其大小计算平方。山东通风管加工为大家分享下如何计算通风管道的平方?
When installing the ventilation duct, the square shall be calculated according to its size. Shandong ventilation pipe processing for everyone to share how to calculate the square of the ventilation pipe?
一、如何计算通风管的平方
1、 How to calculate the square of ventilation pipe
1.计算通风管道的面积，需要根据其形状进行计算。一般来说，有些是方形的，有些是圆形的。如果是方形通风管道，就要先测量其宽度和高度，将两者之和相加，乘以2，再乘以长度，这样就可以得到它的面积。
1. Calculate the area of ventilation duct according to its shape. Generally speaking, some are square and some are round. If it is a square ventilation duct, first measure its width and height, add the sum of the two, multiply by 2, and then multiply by the length, so as to obtain its area.
2.如果是圆，直接按圆的面积将圆的周长乘以整个通风管道的长度，按其半径将圆的周长乘以π，再乘以2即可得到。
2. If it is a circle, directly multiply the circumference of the circle by the length of the whole ventilation pipe according to the area of the circle, multiply the circumference of the circle by π according to its radius, and then multiply by 2.
3.无论是圆形还是方形通风管道，都要先按其面积打孔，再在墙体上打孔。如果太小，可以以后再改。但如果一开始开孔尺寸比较大，以后想缩小尺寸或密封，通风效果就会受到影响。
3. Whether it is a circular or square ventilation duct, it is necessary to punch holes according to its area first, and then punch holes on the wall. If it's too small, you can change it later. However, if the opening size is relatively large at the beginning and you want to reduce the size or seal later, the ventilation effect will be affected.
通风管道
Ventilation duct
二、通风管道有哪些类型
2、 What are the types of ventilation ducts
1.按标准有整体普通型和保温型，包括三种类型的组合。
1. According to the national standard, there are integral general type and thermal insulation type, including the combination of three types.
2.如果是通风管道组成的，也是市面上使用更多的类型。这种原有的通风管道没有消音功能，所以在运行过程中会产生一定的噪音，后期可以重新安装消声器。同时，保温性能可能会稍差一些，因为它的导热系数还是比较大的，所以需要加装保温层。但防火性能较好，达到不燃水平，并具有一定的耐腐蚀性能防锈效果。
2. If it is composed of ventilation pipes, it is also the most used type on the market. The original ventilation duct has no silencing function, so a certain amount of noise will be generated during operation. The muffler can be reinstalled in the later stage. At the same time, the thermal insulation performance may be slightly worse, because its thermal conductivity is still relatively large, so it is necessary to install a thermal insulation layer. However, the fire protection performance is good, reaching the non combustible level, and has certain corrosion resistance and rust prevention effect.
3.有一种无机玻璃通风管道，属于新型材料，主要采用玻璃纤维。经过加工制造，它已经达到了耐火等级，耐腐蚀，重量很重，但很脆弱，容易变形或折断。
3. There is an inorganic glass ventilation pipe, which belongs to a new material and mainly adopts glass fiber. After processing and manufacturing, it has reached the fire resistance rating, corrosion resistance, heavy weight, but very fragile, easy to deform or break.
4.还有一种纤维织物风道，具有消音功能，重量轻，安装简单，性价比超高，有一定的抗压强度。
4. There is also a fiber fabric air duct, which has silencing function, light weight, simple installation, ultra-high cost performance and certain compressive strength.
小结：在设计通风管道时，需要根据其面积来决定墙体上需要钻多少孔，所以前期面积一定要计算准确，以免后期安装出现错误。
Summary: when designing the ventilation duct, it is necessary to determine how many holes need to be drilled on the wall according to its area, so the area in the early stage must be calculated accurately to avoid errors in later installation.
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