The exposure of range hoods is common in some old houses and communities, especially in the process of kitchen demolition. There are many reasons for the exposure, including the original design did not take into account the layout of indoor ducts, construction mistakes of building construction personnel, improper use and so on.

first, the oil fume pipeline is faulty-when installing the range hood, it is possible that the direction of the oil fume pipeline is not ideal, the included angle is insufficient or it is bent too much. In this case, the air can't circulate, which makes heat and lampblack accumulate in the lampblack machine, which leads to the exposure of the lampblack machine.

second, the renovation of old houses-during the renovation of old houses, some owners will install range hoods in the outside windows. If after years of consumption, the pipeline can't withstand the external wind, many times of hook and bend will lead to the displacement and exposure of the pipeline.

thirdly, the performance problem of the range hood itself-some range hoods with poor quality are overloaded due to excellent interior and bad equipment settings, and the vibration becomes increasingly prominent, eventually damaging the pipeline and exposing the biliary tract.

to sum up, correct installation, normal use and good maintenance are the key factors to avoid exposure of range hoods. If you find that the range hood is exposed, you should immediately contact a professional to replace or repair it.