First, the construction details should be paid attention to
Make sure that the pipes are as short as possible. Some owners will pull the pipe longer for the sake of beauty. After turning off the range hood in this way, there will be a lot of oil smoke in the pipeline that can't be discharged and then poured back indoors. In addition, in order not to destroy the original main and auxiliary flue, its opening direction cannot be changed at will, and it must be drilled in the auxiliary flue. Owners can't change according to their own preferences. However, the hole of the flue can be enlarged, but be careful not to damage the baffle of the auxiliary flue.
Second, pay attention to safety when smoking outside the window.
Before opening holes in windows or walls, you must get the approval 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 out of the window, and the strong north wind blowing on the face will lead to the backflow of lampblack, increase the load of the lampblack machine and shorten the service life of the lampblack machine. The solution is to extend the pipes and nest them, which can prevent rainwater from flowing into the pipes when it rains and leave the windshield outside.
Third, check valves are frequently replaced.
If the auxiliary flue has been removed, or it is necessary to better prevent the flue gas from falling back, a flue check valve can be used. Many owners will question that the range hood already has a check valve, why should it be equipped with a flue check valve? In general, the function of the check valve of the range hood is not very significant, but installing the check valve in the flue can protect the range hood, so that the smoke in the flue will not flow back to the pipeline and the range hood.
However, after installing the check valve, it should be cleaned regularly, otherwise it will make the check valve open and lose its function. And it is best to replace the flue check valve every two years or so.
Fourth, the auxiliary flue must be preserved.
The main flue runs through the whole building. The auxiliary flue is relatively independent. It is separated from the main flue by a perforated partition, and the upper and lower parts are sealed by the floor. Generally, the lampblack at home will go to the auxiliary flue first, make a cache, and then enter the main flue through the hole in the partition, so as to ensure that the lampblack of every household is isolated and will not cross smoke. Primary flue and secondary flue must exist at the same time.