1, the flue is too long and curved. This is very common and is the main cause of poor exhaust smoke, this is mainly because in the exhaust smoke will be "touching the wall of the phenomenon will lead to smoke concentrated in a corner, suction is blocked, the wind pressure is not strong, it is difficult to exhaust the smoke.

2, small suction and too many bends in the flue. This is our common in the kitchen cooking two people, say a word can not be heard, because the noise in the pipe is very large, a long time, not only the smoke is not clean, but also affect the mood.

3, the flue is not set up reasonably, no installation of the backstop valve or improper installation, so there will be neighbors cooking smoke will be scurrying to their own homes, this time the smell of smoke with the same trouble, lingering.

4, flue installation is unreasonable. Nowadays, the flue will generally come with waterproof function, but if the flue is not installed reasonably, the waterproof effect will be greatly reduced, so there will be water seepage, and this water may be their own, may be from the neighbor's home.

Two, what is the correct way to install a kitchen flue?

1, first of all, we need to install a non-return valve on the kitchen flue, which can effectively prevent the smoke from backing up, and reduce the occurrence of the smoke running around.

2, in the decoration of the flue, to ensure that the flue is placed vertically, to a large extent, can make the exhaust more smooth, but also more convenient to connect to the public **** flue.

3, after the flue is done, it is best to use cement to fill the gap between the flue and the wall, to avoid the grease and smoke from the gap in the wall to back up in the future.

4, in addition, use tinfoil to seal the pipe, which will avoid accidentally having debris fall into the flue in the later construction process, resulting in flue blockage.