Many restaurant owners ask: how often should an exhaust duct really be cleaned? There is no one-size-fits-all answer — it depends on how intensively your kitchen is used.
Three key factors affecting cleaning frequency
1. Number of stoves and operating hours
The more stoves and the longer the daily operating hours, the more exhaust is produced and the faster grease builds up in the ducts. Large restaurants, hot pot and barbecue venues usually accumulate grease faster.
2. Cuisine and exhaust density
Chinese stir-frying, deep-frying and barbecue produce high exhaust density, so grease builds up markedly faster than for light meals or Western food.
3. Purification equipment
Kitchens equipped with efficient purifiers that are regularly maintained accumulate grease relatively slowly.
Recommended cleaning frequency
- Large dining / hot pot & barbecue: every 1-2 months
- Medium restaurants: every quarter
- Small fast food / light meals: every six months
- Corporate / school canteens: concentrated cleaning each quarter or during breaks
Consequences of neglecting cleaning
Without long-term cleaning, grease accumulates heavily inside the ducts. Once it meets an open flame, it can easily start a fire; meanwhile poor exhaust causes a hot, stuffy kitchen and backdraft, reducing service efficiency and harming staff health, and may lead to fire and environmental penalties.
We recommend establishing a fixed cleaning record and reminder system to keep your exhaust system safe and compliant at all times. For a professional assessment, call our service hotline to book a free on-site inspection.
