How Do You Clean a Restaurant Hood Vent?
Restaurant hood vent cleaning is a split job: the room side of the filter bank belongs to the kitchen crew, and everything behind it belongs to a contractor who can document the work. For an owner or manager, the useful version of this question is not which brush to buy. It is which tasks to write into the closing checklist, which ones to buy on a schedule, and how to read the certificate afterwards closely enough to know whether the duct and the rooftop fan were genuinely touched.
What can restaurant staff clean themselves?
Kitchen staff can own the canopy underside, the stainless around it, the grease trough, and the baffle filters. That is a real contribution, not a token one.
The value of in-house work is that it slows the rate at which everything downstream loads. Grease that gets wiped off a canopy at close never runs down onto the line, and grease captured by a filter that is still draining freely never reaches the plenum. A kitchen with a disciplined nightly and weekly routine arrives at its scheduled cleaning in noticeably better condition than one without, and the difference compounds over a year.
Three habits are worth writing into a closing checklist explicitly, because they are the ones that quietly lapse. Empty the grease trough before it can overflow rather than when someone notices it has. Refit filters the right way around after washing, because a reversed baffle does not drain into the trough and the mistake is invisible from the floor. And treat a filter that holds liquid grease instead of shedding it as overdue, whatever the schedule says, because that filter has stopped filtering.
One caution about method. Filters run through a dishwasher on an aggressive cycle can be damaged, particularly aluminium frames, and a damaged filter seats badly and leaks vapour past the bank. A soak and a rinse is safer than a hot machine cycle. Filter handling is covered in more depth on the hood filter cleaning page.
What has to be done by a contractor?
The plenum, the duct run, the rooftop fan, and the paperwork. Three of those are access problems and the fourth is not a cleaning task at all.
The plenum sits behind the filter bank and holds more grease than anything a cook sees. Reaching it properly means pulling the bank, containing the area, and working a cavity that drips. The duct run is cleaned through access panels, which means opening and resealing them, and a building with no panels has a duct that cannot be certified as cleaned. The rooftop fan is height work over a greasy surface, with the added requirement that grease and wash water are captured rather than left on the membrane.
The fourth item is different in kind. Barrie Fire and Emergency Service enforces the Ontario Fire Code, which adopts NFPA 96 by reference, and the question at inspection is whether dated evidence exists that the whole path was cleaned at the right interval. Evidence is not something a kitchen crew can generate about its own work. It comes from a contractor who photographs each surface before and after and signs a certificate referencing the standard. Institutional and property-managed sites usually add proof of liability insurance and WSIB coverage before anyone is on site, with the landlord or board named as additional insured on request.
The commercial numbers, for budgeting: a single-hood restaurant visit starts from $385 and multi-hood kitchens from $725, with club, campus, and multi-tenant sites quoted after a free walk-through. A written quote comes back within 24 hours. Service detail is on the commercial hood cleaning page, and a fuller cost breakdown in the hood cleaning cost guide.
Staff task or contractor task? The split by frequency
Barrie Hood Cleaning's working division of labour for a restaurant, sorted by how often each task comes around.
| Task | Frequency | Who | Why it sits there |
|---|---|---|---|
| Wipe canopy underside and surrounding stainless | Nightly at close | Staff | Reachable, low risk, and it stops drips reaching the cook line |
| Empty the grease trough | Nightly or as it fills | Staff | An overflow is a food-safety problem the same shift it happens |
| Wipe filter faces | Nightly on fryer and wok lines | Staff | Keeps baffles draining between proper soaks |
| Soak and rinse baffle filters | Weekly | Staff, or a contractor exchange | Needs sink space and time. Kitchens short on either buy an exchange schedule instead |
| Check filters are refitted the right way around | Every time they go back | Staff, manager spot-check | A reversed baffle stops draining into the trough and nobody sees it from the floor |
| Clean the plenum behind the filter bank | At the scheduled interval | Contractor | Containment and capture required, and it is the heaviest-loaded surface in the system |
| Clean the duct run through access panels | At the scheduled interval | Contractor | Panels have to be opened and resealed, and missing panels have to be flagged |
| Clean the rooftop fan and blower wheel | At the scheduled interval, ahead of freeze-up in Barrie | Contractor | Height work, wheel balance, and grease capture off the roof membrane |
| Photo record and signed certificate | Every scheduled visit | Contractor only | A kitchen cannot certify its own work, and this is what an inspector and an adjuster ask for |
How do you read a hood cleaning certificate?
Read it for what it names and for what it leaves out. A certificate that says only "hood cleaned" is telling you almost nothing.
Seven things belong on a certificate worth putting in a file. The date of the cleaning. The address and which system was cleaned, which matters in a building with more than one. An itemised list of surfaces covered, meaning canopy, filters, plenum, duct, and fan named separately rather than summarised. Any area recorded as not accessible. A reference to the NFPA 96 standard. The next interval. And a signature.
The fourth item is the one owners misread. A "not accessible" line looks like a failure and is actually a sign of honesty. Buildings have ducts with no access panels and roofs that cannot be worked safely in a February squall, and a contractor who records that is telling you exactly where your gap is. A certificate with no gaps at all, on a system with no access panels, is the version to worry about.
Then check the certificate against the photographs, because that pairing is where a thin job shows. No images taken through duct access openings means the duct was probably not opened. No rooftop image means the fan was probably not cleaned. No plenum image means the heaviest-loaded surface in the system is undocumented. Matching before-and-after angles matter too: two photos taken from different positions are not evidence of a change.
One structural warning for anyone in a plaza. Cleaning one tenant's hood and duct does not clear a riser that several kitchens feed, because the neighbours keep loading it. Each kitchen on the riser needs its own cleaning and its own record. Property managers generally handle this by putting every unit on one schedule with a separate certificate per kitchen. What the standard itself requires is set out on the NFPA 96 page, and the interval that applies to your line is in the guide on cleaning frequency.
How is the work scheduled around service?
Barrie Hood Cleaning books restaurants overnight, so the kitchen never loses a trading hour and the morning crew walks into a working line.
For a restaurant that means starting after last service and finishing before morning prep. For a golf or banquet kitchen it means working between event bookings rather than around a closing time that does not really exist. For a campus servery it means March break, reading week, or the summer term while the servery is dark. Seasonal kitchens around Wasaga Beach, Collingwood, and the ski hills get scheduled off the end of their peak rather than the calendar year, because that is when the system is actually loaded.
Two scheduling details are worth asking any contractor about before booking. The first is whether rooftop work is planned ahead of freeze-up, because a Barrie roof from December through March can leave a fan buried and a unit without a hinge kit effectively unserviceable. The second is what the handback standard is: tarps off, degreased surfaces rinsed and wiped, floors non-slip, filters back the right way around. A description of that whole night, phase by phase, is in the guide on how kitchen hoods are cleaned. To book a walk-through, use the contact page or call 705-413-1011.
Restaurant hood vent cleaning: frequently asked questions
What owners and managers ask when they are deciding what to buy and what to delegate.
What can restaurant staff clean without a contractor?
Kitchen staff can own everything on the room side of the filter bank: wiping the canopy underside and the stainless around it nightly, emptying the grease trough before it can overflow onto the line, and soaking the baffle filters on a weekly rhythm. Done consistently, that work slows how fast the plenum and duct load, which makes the scheduled cleaning easier and the system healthier. What staff should not attempt is anything behind the filters, up the duct, or on the roof.
What genuinely needs a contractor?
The plenum cavity behind the filter bank, the duct run and its access panels, the rooftop fan and blower wheel, and the documentation. Those need containment, access hardware, wash water capture, height safety, and WSIB coverage, and the last of them is not a skill at all but a record. A restaurant that cleans everything it can reach still has no evidence for an inspector, because the evidence is the photo set and the signed certificate.
What should a hood cleaning certificate show?
A certificate worth filing shows the date of the cleaning, the address and the specific system cleaned, an itemised list of the surfaces covered rather than a single line saying hood cleaned, any area that could not be reached recorded as not accessible, a reference to the NFPA 96 standard, the next interval, and a signature. Barrie Hood Cleaning issues that alongside a before-and-after photo set of each surface, shot from matching angles.
How can an owner check they got what they paid for?
Compare the certificate against the photo set and look for the parts nobody sees. If there are no images taken through duct access panels, the duct probably was not opened. If there is no rooftop image, the fan probably was not cleaned. If the plenum behind the filter bank does not appear anywhere, the most heavily loaded surface in the system is undocumented. An honest not accessible entry is a better sign than a certificate with no gaps at all.
Does cleaning our hood clear a shared riser in a plaza?
No, and this is the trap in multi-tenant buildings. Cleaning one tenant's hood and duct does not clear a riser that several kitchens feed, because the other kitchens keep loading it. Each kitchen on that riser needs its own cleaning and its own record. Property managers usually solve it by putting every unit on one schedule with individual certificates per kitchen, which also gives the landlord a complete file for the building.