1. The auxiliary flue must be divided into main flue and auxiliary flue. The main flue runs through the whole building, while the auxiliary flue is relatively independent. If the auxiliary flue is directly connected to the main flue, the pressure will be too low, which will lead to the phenomenon of smoke pouring or smoking. Therefore, during the installation of kitchen flue, we must keep the existence of secondary flue.

2、窗戶排煙有的朋友家里未來避免串煙的問題，會選擇直接在窗戶上開孔排煙。針對這樣的方式小編有一點需要提醒大家：那就是問題。因為排煙管末端是金屬材質的，如果開的洞太小，金屬傳熱可能會使玻璃炸裂，傷及行人，所以在安裝的規劃上大家就要注意了。

2. Some friends will choose to open holes on the windows to smoke in the future to avoid the problem of smoke emission in their homes. In view of this way, we need to remind everyone: that is, security. Because the end of the smoke exhaust pipe is made of metal, if the hole is too small, the metal heat transfer may break the glass and hurt pedestrians, so we should pay attention to the installation planning.

3、副煙道務必保留煙道每家的廚房里都有煙道，同時煙道也有主副之分，主煙道貫穿整個樓體，而副煙道是相對獨立的。一般家里的油煙會先到副煙道里，然后再通過隔板上的孔進入主煙道，這樣可保證每戶的油煙是隔離開來的。而如果將副煙道直接連接主煙道，就會由于壓力過低而導致倒煙或串煙現象。

3. The secondary flue must be reserved. Each kitchen has a flue. At the same time, the flue can be divided into main flue and auxiliary flue. The main flue runs through the whole building, while the secondary flue is relatively independent. Generally, the lampblack in the home will go to the auxiliary flue first, and then enter the main flue through the hole on the partition board, so as to ensure that the lampblack in each household is isolated. If the auxiliary flue is directly connected to the main flue, the pressure will be too low, which will lead to the phenomenon of back smoke or smoke.

4、施工細節要注意迅速排煙防止串味看廚房排煙管道安裝，選擇抽油煙機安裝的位置十分重要。管道越短越好。更好將管道伸出去以后把管道往下窩，這樣還可以避免下雨時雨水流進管道，并把風擋在外面。

4. The construction details should pay attention to the rapid smoke exhaust to prevent odor. First of all, it is very important to select the installation position of the range hood. The shorter the pipe, the better. It is better to stretch out the pipe and nest it down, so as to avoid rainwater flowing into the pipe when it rains and keep the wind out.

5、不過，安裝止逆閥后要定期清洗，否則會使止逆閥呈打開狀態，失去效果，而且煙道止逆閥更好兩年左右就更換一次。

5. However, the check valve shall be cleaned regularly after installation, otherwise, the check valve will be opened and lose its effect, and the flue check valve should be replaced once every two years or so.