Common Mistakes When Using a Kitchen Exhaust Hood

As living standards rise, people pay more attention to food and kitchen hygiene, so the exhaust hood has become essential. Are you using it correctly? CHINENG reviews common mistakes in hood operation.

Mistakes in using an exhaust hood

1. Running the hood only while stir-frying

Many people switch it on for stir-frying but leave it off when boiling water or cooking rice.

A hood does more than remove cooking fumes. It also clears gas pollution: leaks at ignition and shut-off, and combustion products, especially from LPG, which can be more harmful than cooking smoke.

Correct practice: turn the hood on whenever the range is in use, and do not seal the kitchen windows. Air must be able to move so the hood can work properly.

2. Switching the hood off as soon as cooking is finished

Turning the hood off immediately saves a little electricity, but residual fumes stay in the room and leave the kitchen greasy.

Correct practice: wait 5–6 minutes after cooking before switching off, so leftover gases are removed and the kitchen stays smoke-free.

3. Cleaning only the exterior

Grease builds up after a period of use, but most people wipe only the outside and ignore the interior.

Grease on the motor shaft increases friction and load. Over time it oxidizes into acidic deposits that corrode the hood. Grease in the housing and duct is also a fire hazard. Sticky soil on the impeller and duct restricts exhaust, lets fumes spread, and harms health.

Correct practice: have the interior professionally cleaned every 3–5 months. That reduces hazards and protects health.

4. Using the hood in a sealed room

Some people close all doors and windows, thinking that helps the hood. In fact, without makeup air, gas combustion suffers.

Correct practice: open a window or use a fan to supply fresh air while the hood runs. Avoid strong cross-ventilation, which can reduce capture and hurt exhaust performance.

Those are the main mistakes in kitchen hood use. Regular cleaning is essential if the hood is to run properly. We hope this article helps. More practical content is available on the CHINENG commercial kitchen website.