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1. Installation of ventilation ducts for oil fume extraction

安裝抽油煙機的通風管道，在進行設計的時候，要以國家的標準為準，并一定要有生產廠家的合格證書以及檢驗證書，通常通風管尺寸在2000*450左右，是比較大的通風管道了。

When designing the ventilation duct for installing a range hood, national standards should be followed, and the manufacturer's certificate of conformity and inspection certificate must be provided. Usually, the size of the ventilation duct is around 2000 * 450, making it a relatively large ventilation duct.

2、浴霸通風管道安裝

2. Installation of Yuba ventilation pipeline

安裝浴霸通風管道規格尺寸需要300*300mm，或者300*600，其直徑大概是在100到150之間，這個通風管道尺寸還是要根據家里的面積來選購一款大小合適的通風管道。通風管道的規格在40厘米以下的，其吊架的距離不得大于4米，如果通風管道規格是在40厘米以上的，其吊架的距離不得大于3米。

The installation of Yuba ventilation duct requires a size of 300 * 300mm or 300 * 600, with a diameter of approximately 100 to 150. The size of this ventilation duct should still be selected based on the size of the home. If the size of the ventilation duct is below 40 centimeters, the distance between the hangers shall not exceed 4 meters. If the size of the ventilation duct is above 40 centimeters, the distance between the hangers shall not exceed 3 meters.

3、新風系統通風管安裝

3. Installation of ventilation duct for fresh air system

新風系統主機、金屬風管都應該做保溫處理。應該在吊桿上安裝減震器；新風輸出口、排風輸出口和主機之間的連接都應該采取安裝消聲器或用軟連接來連接

The host and metal air ducts of the fresh air system should be insulated. Shock absorbers should be installed on the suspension rods; The connection between the fresh air outlet, exhaust outlet, and the host should be made by installing a muffler or using a soft connection

風管道風量計算

Calculation of air volume in air ducts

舉例來說：如果風管截面積：0.2048平方米，管道里氣流按20米/秒

For example, if the cross-sectional area of the air duct is 0.2048 square meters, the airflow in the duct is calculated at 20 meters per second

0.2048*20*3600=14745立方米/小時

0.2048 * 20 * 3600=14745 cubic meters/hour

這就是這個管道需要的流量，其它照此計算

This is the flow rate required for this pipeline, and other calculations are based on this

通風管道內風速及風量的測定，是通過測量壓力換算得到。測得管道中氣體的真實壓力值，除了正確使用測壓儀器外，合理選擇測量斷面、減少氣流擾動對測量結果的影響很大。測量斷面應盡量選擇在氣流平穩的直管段上。

The measurement of wind speed and air volume inside the ventilation duct is obtained by converting the measured pressure. To measure the true pressure value of gas in the pipeline, in addition to using pressure measuring instruments correctly, selecting a reasonable measurement section and reducing airflow disturbance have a significant impact on the measurement results. The measurement section should be selected as much as possible on a straight pipe section with smooth airflow.