The auxiliary flue must be preserved

每個家庭的廚房都有煙道，并且煙道有主副區別，主煙道連接整個樓體，而副煙道是比較獨立的。通常家中的油煙會先到副煙道中，接著再由隔板中的孔進去主煙道，這樣可確保每戶的油煙是隔開的。而如果把副煙道直接連主煙道，便會因為壓力太低而造成倒煙串煙等現象。

Each family's kitchen has a flue, and the flue has a main and secondary distinction. The main flue connects the entire building, while the secondary flue is relatively independent. Usually, the cooking fumes in the home will first enter the secondary flue, and then enter the main flue through the holes in the partition, ensuring that the cooking fumes in each household are separated. If the secondary flue is directly connected to the main flue, it will cause phenomena such as inverted smoke and string smoke due to low pressure.

施工細節要注意

Pay attention to construction details

，決定油煙機安置的位置尤為重要。管道短較好。部分用戶會為了美觀， 將管道拉得更長，如此一來，關閉油煙機后，管道中還會集聚許多油煙排不出去，再倒回室內。此外，為了不破壞原主副煙道，其開口方位并非隨意更改的，必須打到副煙道當中。

Firstly, it is particularly important to determine the location of the range hood. Short pipelines are better. Some users may pull the pipeline longer for the sake of aesthetics. In this way, after turning off the range hood, many oil fumes will accumulate in the pipeline that cannot be discharged and then return to the indoor environment. In addition, in order not to damage the original main and auxiliary flue, the opening direction is not arbitrarily changed and must be inserted into the middle of the auxiliary flue.

窗戶排煙注意

Window smoke exhaust, pay attention to safety

部分用戶為了防止串煙問題，舍棄原有煙道，直接在窗戶開孔排煙，這樣做也行，但有幾點要留意，在窗戶或墻體開洞前，必須通過物業的同意。其次應留意問題，通常排煙管尾端為金屬材質，若開洞過小，金屬傳熱或許會造成玻璃炸裂，且煙管通向窗外，強風對著吹會造成油煙倒灌。盡量把管道伸出后將管道往下窩，這樣還能防止下雨時雨水流入管道，并將風擋在外面。

Some users, in order to prevent smoke issues, abandon the original flue and directly open holes in the window for smoke exhaust. This is also possible, but there are several points to note: first, before opening holes in the window or wall, the property management must obtain approval. Secondly, attention should be paid to safety issues. Usually, the tail end of the smoke exhaust pipe is made of metal material. If the hole is too small, the metal heat transfer may cause the glass to crack, and the smoke pipe leads out of the window. Strong winds blowing against it can cause oil smoke to pour back. Try to extend the pipeline and nest it down as much as possible, which can also prevent rainwater from flowing into the pipeline during rain and keep the wind out.

止逆閥門勤更換

Frequent replacement of check valves

若已將副煙道拆掉，或要避免倒煙的作用好，那么利用煙道止逆閥。通常狀況下，止逆閥效果并非明顯，而在煙道加裝止逆閥能保護油煙機，讓煙道中的煙不會往管道和油煙機中倒灌。但是，加裝止逆閥后應定期清潔，不然會讓止逆閥呈打開狀態，失去效果，且好2年左右換一次。

If the auxiliary flue has been removed or if the effect of pouring smoke is to be avoided, then use the flue check valve. Under normal circumstances, the effect of a check valve is not significant, but installing a check valve in the flue can protect the range hood and prevent smoke from flowing back into the pipeline and range hood. However, after installing a check valve, it should be cleaned regularly, otherwise it will leave the check valve in an open state and lose its effectiveness, and it should be replaced every two years or so.

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