How to change the flue in the kitchen?

It is not recommended to replace the flue, but the following points must be noted:

First of all, before opening a hole in a window or wall, you must get the consent of the property. In addition, this is a security issue. Generally, the end of the exhaust pipe is metal. If the hole is too small, metal heat transfer may break the glass and hurt pedestrians. Moreover, the smoke pipe leads to the outside of the building, and the strong north wind blowing head-on will lead to the backflow of lampblack, which will also increase the load of the lampblack machine and shorten the service life of the lampblack machine. The best solution is to extend the pipe and nest it, so as to prevent rainwater from flowing into the pipe when it rains and leave the windshield outside.