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、如何計算通風管的平方

1、 How to calculate the square of ventilation pipe

1.計算通風管道的面積，需要根據其形狀進行計算。一般來說，有些是方形的，有些是圓形的。如果是方形通風管道，就要先測量其寬度和高度，將兩者之和相加，乘以2，再乘以長度，這樣就可以得到它的面積。

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.如果是圓，直接按圓的面積將圓的周長乘以整個通風管道的長度，按其半徑將圓的周長乘以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.無論是圓形還是方形通風管道，都要先按其面積打孔，再在墻體上打孔。如果太小，可以以后再改。但如果一開始開孔尺寸比較大，以后想縮小尺寸或密封，通風效果就會受到影響。

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.

通風管道

Ventilation duct

二、通風管道有哪些類型

2、 What are the types of ventilation ducts

1.按標準有整體普通型和保溫型，包括三種類型的組合。

1. According to the national standard, there are integral general type and thermal insulation type, including the combination of three types.

2.如果是通風管道組成的，也是市面上使用更多的類型。這種原有的通風管道沒有消音功能，所以在運行過程中會產生一定的噪音，后期可以重新安裝消聲器。同時，保溫性能可能會稍差一些，因為它的導熱系數還是比較大的，所以需要加裝保溫層。但防火性能較好，達到不燃水平，并具有一定的耐腐蝕性能防銹效果。

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.有一種無機玻璃通風管道，屬于新型材料，主要采用玻璃纖維。經過加工制造，它已經達到了耐火等級，耐腐蝕，重量很重，但很脆弱，容易變形或折斷。

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.還有一種纖維織物風道，具有消音功能，重量輕，安裝簡單，性價比超高，有一定的抗壓強度。

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.

小結：在設計通風管道時，需要根據其面積來決定墻體上需要鉆多少孔，所以前期面積一定要計算準確，以免后期安裝出現錯誤。

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.