How Long Does a Hood Cleaning Take?
A hood cleaning is a scheduled visit in which a crew strips grease from a commercial kitchen's canopy, filters, plenum, duct, and rooftop fan, and it typically takes three to five hours for a single-hood kitchen on a regular interval. Multi-hood kitchens with two to four canopies generally run five to eight hours. Club, campus, and multi-tenant sites are scoped at the walk-through. The number that usually matters more than the duration is when the crew arrives, because an overnight visit costs a kitchen no trading hours at all.
Typical time on site by kitchen size
Duration tracks canopy count, duct routing, and condition. These are working ranges for systems cleaned on schedule.
| Kitchen size or type | Typical time on site | What drives it |
|---|---|---|
| Cafe or takeaway, one short canopy | 2 to 3 hours | Short duct, few filters, usually a straightforward roof or wall termination |
| Independent restaurant, single hood | 3 to 5 hours | Full canopy, plenum, duct run, and rooftop fan, plus the photo set |
| Multi-hood kitchen, two to four canopies | 5 to 8 hours | Canopies worked in sequence, each documented separately on the certificate |
| Golf or country club kitchen | Scoped at the walk-through | Banquet and a la carte lines are often separate systems on separate risers |
| Campus, school, or base servery | Scoped, often across more than one shift | Long duct runs, multiple cooking suites, and site access procedures |
| Legion or community hall | 2 to 4 hours | Usually a low-volume annual interval, so deposits are lighter than they look |
| Any system years past its interval | Up to double the figure above | Hardened grease has to be scraped along the duct rather than dissolved off it |
What the crew does in each phase
Four phases, and the two that look like preparation are the ones that protect the kitchen.
Set-up and containment, roughly the first 30 to 45 minutes. The cook line and any exposed food contact surfaces get tarped, floor protection goes down, run-off is contained and directed, and the crew confirms the roof route and hatch access before anything wet is opened. Nothing is sprayed until containment is in place, because rinse water carrying dissolved grease is the thing most likely to leave a mess behind.
Filters and canopy. Baffles come out and go to soak while the canopy interior and the plenum cavity behind the filter bank are worked. The plenum is the part a wipe never reaches and the part inspectors look at first.
Duct and rooftop fan. Access panels are opened along the run, the duct interior is cleaned section by section, and the fan is lifted or hinged back so the blades, the wheel, and the housing get done. This phase varies more than any other, since a short vertical rise and a long horizontal run through a ceiling void are entirely different jobs.
Documentation and handback. Each surface is photographed before and after from matching angles, the signed certificate referencing NFPA 96 is completed on site, filters go back in the right way round, tarps come off, and floors are wiped. The morning crew should walk into a working kitchen rather than a job site. What that full path covers is set out under kitchen exhaust cleaning.
What makes a hood cleaning run long
Four causes account for most overruns, and three of them are visible before the crew arrives.
An overdue system. Grease that has been repeatedly heated over years cross-links into a hard varnish. Degreaser softens the surface and not much more, so removal becomes mechanical: scraping, section by section, the length of the duct. This is the single biggest variable, and it is why the first visit on a neglected system takes far longer than the same kitchen will take once it is back on interval.
Missing access panels. Panels are how a duct interior gets reached, cleaned, and photographed. Where a run has none, those sections cannot be properly done, and fitting panels is separate work rather than something absorbed into the visit. Knowing in advance whether they exist changes the schedule.
Roof access. A hatch, a ladder, and a hinged fan is quick. A landlord-controlled shared hatch that needs arranging, a high roof, or a fan bolted flat with no hinge kit each add time before any cleaning begins. Around Barrie this has a seasonal edge, since a rooftop unit can sit under packed snow for months, which is why rooftop work gets pulled ahead of freeze-up rather than scheduled into it. The rooftop grease containment service covers what happens at the fan end.
Multi-hood sequencing. Two canopies do not take half the time each. Containment, soaking, and rinse-water management have to be handled one area at a time, so canopies are worked in sequence. That is why a multi-hood price and a multi-hood duration both rise less than proportionally but still rise.
Why the duration rarely costs you service hours
Placement matters more than length. An eight-hour job that starts at midnight costs a restaurant nothing.
Operators ask about duration because they are really asking about lost trade. The answer is that the visit is scheduled into the gap the kitchen already has. Restaurants are cleaned overnight, starting after last service and finishing before morning prep. Club and banquet kitchens are booked between event dates rather than around closing time, since a club kitchen that is dark on a Tuesday has a better window than any restaurant. Campus and school board serveries are done during March break, reading weeks, or the summer term when the servery is not running at all.
Two things follow. First, a longer job is not automatically a more disruptive one, and choosing a faster contractor over a thorough one to save two hours in the middle of the night is a poor trade. Second, the useful question to ask when booking is not how long it takes but what time the crew will be finished and what state the kitchen will be in. Barrie Hood Cleaning commits to a food-ready handback, with filters reinstalled correctly, tarps removed, and floors wiped. Details of the visit itself are on the commercial hood cleaning page.
How long does a home range hood take by comparison?
An afternoon, and most of it is waiting rather than working.
A domestic range hood is not on this scale and nothing above applies to it. The filter soaks in the sink for fifteen to thirty minutes, which is dwell time rather than labour, and wiping out the canopy interior and the exterior adds perhaps another twenty minutes. The method is in the guide on cleaning range hood filters, and the product choice is covered in the guide to which cleaner works best. No crew, no certificate, and no NFPA 96 obligation, because residential range hoods sit outside that standard's scope.
Hood cleaning duration: frequently asked questions
What operators want pinned down before they put a crew in the building.
How long does a commercial hood cleaning take?
A single-hood commercial kitchen on a regular interval usually takes three to five hours on site. A multi-hood kitchen with two to four canopies typically runs five to eight hours, and a club, campus, or multi-tenant site is scoped at the walk-through because canopy count and duct routing vary too much to generalise. A system that is badly overdue can take twice as long as the same kitchen would on schedule.
Does the kitchen have to close for a hood cleaning?
No. Barrie Hood Cleaning schedules restaurants overnight after last service so the work finishes before morning prep, club and banquet kitchens between event bookings, and campus serveries during March break, reading weeks, or the summer term. Duration matters much less than placement: an eight-hour job that runs from midnight costs a kitchen nothing, and a three-hour job at noon costs it a lunch service.
What makes a hood cleaning take longer than expected?
Four things account for most overruns. A system years past its interval carries hardened grease that has to be scraped rather than dissolved. Missing duct access panels mean sections cannot be reached or photographed until panels are fitted. Difficult roof access, a shared landlord-controlled hatch, or a fan with no hinge kit all add time before cleaning starts. And multi-hood kitchens need canopies sequenced rather than worked in parallel, because containment and rinse water have to be managed one area at a time.
How long does it take to clean a range hood at home?
A domestic range hood is an afternoon job, not a crew job. Most of the elapsed time is the filter soaking in the sink, which is fifteen to thirty minutes of waiting rather than work, with perhaps another twenty minutes for wiping the canopy interior and exterior. These commercial durations do not apply to a home kitchen, and neither does the NFPA 96 standard behind them.
Commercial hood cleaning in Barrie starts at $385 per visit for a single-hood kitchen and from $725 for multi-hood kitchens. The hood cleaning cost guide breaks down what moves that number, or call 705-413-1011 for a written quote within 24 hours.