NFPA 96 hood cleaning requirements can be confusing because a required check is not the same as a required full-system cleaning. In Ontario, hoods, ducts, and filters subject to combustible deposits must be checked at intervals no greater than seven days and cleaned when accumulation creates a fire hazard. Review the Ontario Fire Code provision.
For restaurant operators, the practical task is to establish a repeatable checking routine, recognize when grease requires action, separate staff maintenance from professional service, and retain useful records. The process below explains those decisions without reproducing the complete NFPA 96 standard or every local requirement.
What NFPA 96 Hood Cleaning Requirements Cover
NFPA 96 addresses ventilation control and fire protection for commercial cooking operations. Ontario’s Fire Code requires cooking operations that produce smoke or grease-laden vapours to have an exhaust and fire-protection system in accordance with NFPA 96. It also addresses hoods, ducts, and filters where combustible deposits accumulate.
Think of the exhaust system as one connected path, not simply the visible hood above the cooking line. A full cleaning scope may include the hood canopy, baffle filters, plenum, horizontal and vertical ducts, exhaust fan housing and blades, and rooftop discharge area. This commercial kitchen hood cleaning guide explains how those components fit into a cleaning and documentation process.
Cleaning only the hood face can improve appearance while leaving grease farther along the airflow path. The condition of hidden and difficult-to-access components matters when deciding whether routine care is sufficient.
Step 1: Check the Hood, Ducts, and Filters Within Seven Days
Assign responsibility for a recurring check and make it part of kitchen operations. The Ontario requirement concerns checking hoods, ducts, and filters at intervals no greater than seven days, not waiting for an inspection or relying on an occasional deep clean.
Inspect accessible surfaces for visible grease, sticky or thick deposits, dark streaks, residue around seams, and filters that load up quickly. Note changes since the previous check, such as smoke escaping from the hood, weaker apparent airflow, or grease returning soon after cleaning.
Do not remove covers, enter ducts, climb onto a roof, or handle electrical or mechanical components simply to complete a routine check. Record the date, responsible person, areas observed, and any condition requiring follow-up.
Step 2: Decide Whether Accumulation Creates a Fire Hazard
The Fire Code does not establish a universal rule that every commercial kitchen must receive complete professional cleaning every seven days. It requires cleaning when combustible deposits create a fire hazard. Operators should therefore respond to the system’s condition, not a calendar alone.
Warning signs include heavy grease on accessible surfaces, recurring deposits at hood seams, unusually saturated filters, visible buildup around access points, smoke spillage, or strong burnt-oil odours. Noisy or vibrating fans and grease staining near the rooftop discharge also justify further assessment.
Cooking volume, menu, fuel type, operating hours, equipment changes, and seasonal demand affect grease accumulation. A high-volume fryer or grill operation may need a different service approach from a lower-volume kitchen. This overview of exhaust duct fire prevention explains why grease removal must address the full exhaust path.
Step 3: Complete Only Staff-Safe Routine Maintenance
Staff can support the program through safe, accessible tasks. Depending on equipment instructions, these may include wiping exterior hood surfaces, removing nearby food splashes, checking accessible filters, and reporting unusual odours, airflow, grease, or fan conditions.
Follow the manufacturer’s instructions for filter care. Filters may need deep cleaning or exchange when they are damaged, ineffective, or no longer support proper airflow. Staff should not improvise with unsuitable chemicals, unsafe ladders, pressurized water near electrical components, or methods that could affect fire-suppression equipment.
Routine maintenance does not replace cleaning the plenum, horizontal or vertical ducts, rooftop fan, fan blades, or restricted-access areas. If the work requires an access panel, working at height, equipment isolation, or training the team does not have, stop and arrange qualified service.
Step 4: Arrange Professional Full-System Cleaning When Needed
Arrange professional service when checks identify combustible buildup, grease returns rapidly, or staff cannot safely assess important parts of the system. Professional assessment is also sensible after menu or equipment changes, unusual exhaust-fan symptoms, or gaps in service history.
Confirm the scope before booking. Ask whether the work includes the canopy, filters, plenum, horizontal and vertical ducts, fan housing and blades, and rooftop discharge or containment. Also ask how the provider will access each area, protect equipment, manage wastewater or chemicals, and document completion.
A polished hood face does not confirm the condition of hidden ducts or the rooftop fan. Conversely, no cleaning provider should guarantee inspection approval, insurance acceptance, or prevention of every possible fire.
Step 5: Document Checks, Findings, and Corrective Action
Use one log for routine checks and a separate folder or digital record for professional work. This operational checklist is useful even though the exact documentation expected can vary:
- Date and approximate time.
- Name or role of the person completing the check.
- Areas checked, including accessible hood surfaces, filters, and access points.
- Grease deposits, damage, odours, smoke spillage, airflow concerns, or fan conditions.
- Photographs of significant findings or before-and-after conditions where useful.
- Cleaning, filter exchange, repair request, or other corrective action.
- Professional service date, areas serviced, report, and recommendations.
- Follow-up action, responsible person, and target date.
Keep service reports, photographs, invoices, and cleaning records together. A kitchen exhaust cleaning checklist can help standardize review of the hood, filters, ducts, and fan.
Staff Cleaning vs. Professional Exhaust Cleaning
| Area | Routine staff maintenance | Professional full-system service |
|---|---|---|
| Scope | Accessible surfaces, observations, and filter care | Hood, filters, plenum, ducts, fan assembly, and rooftop discharge as applicable |
| Access | Safe, reachable areas | Restricted or difficult-to-reach components |
| Purpose | Identify changes and control accessible grease | Remove accumulated grease throughout the exhaust path |
| Records | Check date, findings, and action | Service report, photographs, cleaned areas, and recommendations |
How to Choose a Hood Cleaning Provider in Ontario
- Ask whether the quote includes the plenum, ducts, fan assembly, and rooftop area, rather than only the hood and filters.
- Ask how the crew handles access panels, equipment isolation, roof access, and nearby equipment protection.
- Request photographs or another clear record of completed work.
- Verify claims about insurance, worker coverage, certifications, or compliance directly with the provider.
- Choose scheduling that works around food preparation, service periods, and equipment cooldown.
- Ask how filter exchange, fan belt concerns, and maintenance findings will be reported.
A provider should distinguish cleaning from repairs and from regulatory decisions made by the applicable authority. Be cautious of promises that one cleaning automatically guarantees compliance in every circumstance.
When to Stop Routine Maintenance and Get Help
Stop treating the issue as ordinary staff maintenance when you find combustible grease accumulation, inaccessible or heavily soiled ducts, rapid grease return, smoke spillage, burnt-oil odours, unusual fan noise or vibration, or roof staining. Document the condition and arrange assessment instead of attempting hazardous access.
Frequently Asked Questions
Does Ontario require a commercial kitchen hood to be cleaned every seven days?
No. The cited provision requires hoods, ducts, and filters subject to combustible deposits to be checked within seven-day intervals. Cleaning is required when accumulation creates a fire hazard. That differs from mandatory complete professional cleaning every week.
What parts should exhaust-system cleaning address?
The system can include the canopy, filters, plenum, horizontal and vertical ducts, exhaust fan housing and blades, and rooftop discharge area. Confirm the exact scope before work begins.
Can restaurant staff clean the entire system?
Staff can support accessible surface and filter care when trained and working safely. That should not be treated as a replacement for professional cleaning of plenums, ducts, rooftop fans, or restricted-access areas.
What records should an Ontario restaurant keep?
Keep dated check records showing who inspected the accessible areas, what was found, and what action followed. Retain service reports, photographs where useful, cleaned areas, recommendations, and evidence of follow-up.
Conclusion: Build a Checking and Cleaning Routine That Matches the Risk
Following NFPA 96 hood cleaning requirements in Ontario means separating three decisions: check the system within every seven-day interval, clean when combustible deposits create a fire hazard, and use professional service when the work exceeds safe staff maintenance.
Keep the full exhaust path in view, including the plenum, ducts, fan, and rooftop discharge. Record findings consistently and choose a provider that explains its scope, safety process, and documentation without unsupported guarantees.
For commercial kitchen exhaust cleaning, hood and duct service, filter cleaning or exchange, and related maintenance across Ontario, contact Robinhood Cleaners to discuss your exhaust system’s condition and service needs.