How often should extraction hoods be cleaned?

Baffle filters should be cleaned weekly in busy commercial kitchens. The hood canopy surfaces should be cleaned daily as part of the close-down procedure. Full deep cleans including ductwork should be carried out every 6-12 months by a specialist contractor, as required by TR/19 guidelines.

Can I clean extraction filters in a dishwasher?

Stainless steel baffle filters can generally be cleaned in a commercial dishwasher. Remove filters, scrape off excess grease, and run through a hot wash cycle. For heavily clogged filters, soak in a degreaser solution first. Never put carbon or paper filters in a dishwasher.

What degreaser should I use for extraction hoods?

Use a heavy-duty alkaline degreaser designed for kitchen use. The degreaser should be effective against baked-on grease and carbon. For filter soaking, a tank of hot degreaser solution works well. Always wear appropriate PPE including chemical-resistant gloves and eye protection.

Why is extraction hood cleaning important for fire safety?

Grease build-up in extraction hoods and ductwork is a serious fire hazard. Grease deposits can ignite from cooking flames or extreme heat. UK fire safety regulations and insurance policies typically require documented evidence of regular extraction system cleaning to TR/19 standards.

CleanCalcs

Extraction Hood Calculator

Estimate cleaning time and degreaser volume for kitchen extraction hood and filter cleaning.

Hood Type

Number of Hoods

Filters per Hood

Baffle filters per hood

Duct Sections

Optional ductwork sections

Degreaser Cost per Litre

Optional

How We Calculate This

How the calculation works

Cleaning time is calculated per hood type plus time for individual filter cleaning and optional ductwork.

Time per hood

Domestic: 30 mins
Commercial canopy (up to 2m): 60 mins
Commercial canopy (2m+): 90 mins
Island canopy: 120 mins

Additional time

Filters: 10 mins each, Duct sections: 45 mins each

Total = hood time + filter time + duct time

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Last updated: February 2026

All calculations are estimates. Always verify quantities and timings for your specific situation.