There are many reasons why kitchen hoods do not exhaust air well. Some of them are listed below:

1. The wind power of the hood is not strong enough.

If the wind power of the hood is not strong enough, it will not be able to exhaust the fumes outside, resulting in the indoor fumes are difficult to emit, accumulate indoors, resulting in thick fumes. At the same time, the weak smoking evacuation function at the top is poor, which also increases the risk of poor fume emission.

2. Hood flue blockage.

If in the use of the process, the hood flue blockage is serious, the exhaust of fumes slowed down, fumes are difficult to discharge, will affect the exhaust effect of the hood.

3. The hood filter is not cleaned or replaced.

If the hood filter is not often cleaned, or not replaced in time, it will lead to clogging of the filter, affecting the exhaust effect.

4. Kitchen doors and windows are not closed tightly.

If the kitchen doors and windows are not closed tightly, it will lead to the outside air into the kitchen, affecting the hood exhaust effect, while affecting the normal work of the hood.

5. Use too long.

If the hood is used for too long, the accumulated fumes during use will block the hood flue and filter, thus affecting the exhaust effect.

6. Home cooking methods do not meet the norms.

If the family cooking style is not in line with the norms, such as not timely clean up grease and food residues, it will increase the use of hood pressure, affecting the exhaust effect.

7. Incorrect placement of the hood.

If the hood is placed incorrectly, it will not be able to properly inhale the grease in the kitchen, affecting its exhaust effect.

In short, these are some of the reasons that lead to bad ventilation of the hood, and to solve these problems, you can regularly clean the filter, pay attention to the way of home cooking and prevent problems such as incorrect placement of the hood.