1、 The auxiliary flue must be reserved. Every kitchen has flue, and the flue also has main and auxiliary flue. The main flue runs through the whole building, while the auxiliary flue is relatively independent. Generally, the lampblack in the home will go to the secondary flue first, and then enter the main flue through the hole on the partition, which can ensure that the lampblack in each household is isolated. If the auxiliary flue is directly connected to the main flue, it will cause smoke inversion or string due to low pressure.

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2、 Pay attention to the construction details. The shorter the pipeline, the better. In addition, in order not to damage the original main and auxiliary flue, the opening direction is not optional, and must be placed inside the auxiliary flue.

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3、 In order to avoid the problem of smoke, some owners abandoned the original flue and directly opened holes in the windows to smoke. This is OK, but there are several points to be noted. First of all, the consent of the property must be obtained before opening the window or wall; Secondly, pay attention to the safety problem. Generally, the end of the smoke exhaust pipe is made of metal. If the hole is too small, the metal heat transfer may cause the glass to crack and hurt the pedestrian, and the smoke pipe leads to the outside of the window, and the strong north wind will cause the oil smoke to pour backward. It is better to stretch the pipe out and then nest it down, so as to prevent rain water from flowing into the pipe when it rains and keep the wind out.