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A canopy-only wipe-down and a complete exhaust system clean are very different jobs. Here is what a full commercial kitchen exhaust clean can include, and the questions to ask before you book.
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Rooftop Exhaust Fan Cleaning and Maintenance: A Practical Guide
The rooftop exhaust fan does the heavy lifting for your whole system, yet it is often left out of cleaning. Here is what fan cleaning covers and when you need a technician as well.
By Apex Commercial Exhaust · · 5 min read
Key takeaways
- Grease builds up on fan blades, impellers and housings and can affect equipment condition.
- Cleaning removes grease; servicing covers mechanical and electrical checks by qualified personnel.
- Roof work involves working at height and must be planned and controlled.
- Noise, vibration or poor extraction need proper diagnosis, not just cleaning.
- The fan should be cleaned as part of the whole exhaust system.
The exhaust fan, usually on the roof, pulls air through your canopy, filters and ducts. Grease that gets past the filters ends up on the fan too. Here is what rooftop exhaust fan cleaning involves and how it differs from servicing.
Why clean the exhaust fan?
Grease on fan blades, impellers and housings can affect equipment condition and contribute to mechanical problems. Vero’s risk guidance on ducts and flues notes that fans at the top of the extraction system should be cleaned and maintained regularly, as grease build-up can cause them to overheat.
What fan cleaning covers
- Accessible fan blades and impellers
- Internal and external fan housing surfaces
- Accessible areas around the discharge
- Notes on any visible wear, damage or concerns
Within the agreed scope, Apex cleans all accessible and reachable fan components. See exhaust fan cleaning.
Cleaning vs servicing
Cleaning removes grease and contaminants. Servicing can include mechanical inspections, belt and bearing checks, electrical assessment and repairs, and must be carried out by appropriately qualified personnel.
Roof safety
Read about working at height
Rooftop fan work involves working at height. Safe Work Australia’s model Code of Practice on managing the risk of falls at workplaces, and WorkSafe Victoria’s compliance code on preventing falls, explain how fall risks should be controlled. Equipment should also be isolated before cleaning. Never send untrained staff onto a roof to check the fan.
Signs your fan needs attention
- Grease around the fan housing or discharge.
- Unusual noise or vibration.
- Smoke lingering in the kitchen.
- No recent record of the fan being cleaned.
Frequently asked questions
Why is my commercial exhaust fan noisy?
Noise can come from wear, loose components, imbalance or bearing problems. Grease can contribute, but noise needs proper diagnosis by a qualified technician.
Can a rooftop fan be cleaned without replacing it?
In many cases, yes. Damaged or mechanically defective equipment may need repair or replacement.
Should the fan be cleaned every time the canopy is?
Not always. Fan cleaning frequency depends on the grease found on the fan and your system’s use.
References & further reading
Government, regulator and Standards sources mentioned in this guide (links checked November 2026; requirements can change, so check the current version):
- WorkSafe Victoria, Compliance code: Prevention of falls in general construction
- Safe Work Australia, Model Code of Practice: Managing the risk of falls at workplaces
- Vero Insurance (AAI Limited), RM Insight: Cleaning of ducts and flues
Need help with your kitchen exhaust? Apex Commercial Exhaust cleans canopies, exhaust ducts, rooftop fans and grease filters for commercial kitchens across Melbourne and Victoria.
This article is general information only and is not legal, insurance or compliance advice. Requirements for your kitchen depend on your system, building and obligations.
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