Professional restaurant grease duct cleaning covers the entire exhaust route, not only the visible hood canopy. A complete service may include the hood, filters, plenum, ductwork, access panels, exhaust fan, and grease containment areas.
That distinction matters for Ontario restaurant operators responsible for fire safety, ventilation, maintenance records, and inspection readiness. This guide explains the full scope, how professional cleaning works, what staff can do between visits, and what to confirm before booking professional grease duct cleaning.
Quick summary
- Full-system cleaning follows grease from the hood and filters through the ducts to the exhaust fan.
- Surface wiping and filter care help between visits but do not replace professional duct access, degreasing, containment, and reporting.
- Frying, grilling, solid-fuel cooking, long hours, and heavy production generally require closer maintenance planning.
- Ontario’s Fire Code connects required exhaust-system maintenance to NFPA 96, but there is no single universal cleaning interval for every kitchen.
- Before booking, confirm scope, access, containment, downtime, photographs, service tags, and the written report.
What restaurant grease duct cleaning includes
Grease-laden vapours travel from cooking equipment into the hood and exhaust system. Deposits can collect behind filters, in the plenum, along horizontal duct runs, around elbows, inside vertical risers, and on fan blades and housings. A visible canopy may look clean while buildup remains farther along the route.
A full service should therefore be discussed as a system. The scope may include:
- Hood canopy and plenum degreasing.
- Filter cleaning or filter exchange.
- Mechanical removal of heavy deposits inside accessible duct sections.
- Suitable degreasing followed by controlled rinsing.
- Exhaust fan, shroud, blade, and grease-collection-area cleaning.
- Containment for appliances, floors, walls, and rooftop surfaces.
- Final inspection, photographs, service tagging, and a written report.
A complete commercial kitchen exhaust duct cleaning process should make clear which areas were reached and cleaned. If a quote only mentions the hood face or filters, ask whether the plenum, ductwork, fan, and access points are included.
Why full-system cleaning matters
Grease buildup is more than a cosmetic issue. Accumulated deposits are combustible, and the exhaust path can provide a route through which a cooking fire spreads. Removing buildup reduces that fuel load, although no cleaning service can guarantee that a fire will not occur.
Clean components can also support steadier exhaust performance. Smoke escaping around the hood, persistent cooking odours, grease near duct seams or the fan, and filters clogging unusually quickly should prompt an assessment. These are operational clues, not formal inspection diagnoses.
The main exhaust duct cleaning benefits are fire-hazard reduction, better visibility into system condition, and clearer maintenance records. Documentation can support maintenance discussions, but it does not guarantee approval by an inspector, insurer, landlord, or other authority.
Ontario Fire Code and NFPA 96
Ontario’s Fire Code states that a cooking operation producing smoke or grease-laden vapours must have an exhaust system and fire-protection system in accordance with NFPA 96. It also requires those systems to be maintained in accordance with NFPA 96. See the official Ontario Fire Code regulation for the applicable wording.
The regulation does not establish one cleaning frequency that fits every Ontario kitchen. The appropriate plan depends on cooking methods, production volume, operating hours, system design, condition, and the requirements of the responsible authority. Ask the provider to explain how its proposed scope supports applicable maintenance expectations.
How professional cleaning works
- Pre-inspection: The technician reviews the hood, filters, duct route, access panels, fan, containment, and difficult-to-reach areas.
- Site preparation: Equipment, floors, walls, and controls are protected with suitable covers and containment.
- Filter handling: Filters are removed for deep cleaning or exchange, depending on their condition and the agreed scope.
- Hood and plenum degreasing: Grease is loosened and removed from the canopy and spaces behind the filters.
- Duct access and scraping: Access panels are opened where available. Hardened deposits may require manual or mechanical scraping.
- Degreasing and rinsing: Appropriate products are applied with controlled dwell time, then residue is rinsed away using a suitable method.
- Fan service: Blades, housings, shrouds, and grease-collection areas are cleaned. Mechanical concerns can be documented for separate work.
- Verification: Filters and panels are replaced, surfaces are cleaned, and the completed work is documented with photographs, tags, and a report.
Routine surface cleaning versus full-system service
Staff can follow daily cleaning procedures, wipe accessible hood surfaces, monitor filters, remove surface grease safely, and report changes in smoke, odour, airflow, or fan noise.
They generally should not enter ductwork, dismantle rooftop equipment, apply chemicals in inaccessible areas, or manage grease-laden wastewater without suitable training and controls.
| Task | What it helps with | Limitation |
|---|---|---|
| Wipe accessible hood surfaces | Controls fresh surface grease | Does not clean the plenum, ducts, or fan |
| Monitor and clean filters | Supports airflow between services | Does not remove deposits inside the exhaust route |
| Observe smoke and odours | Identifies changes needing attention | Is not a formal system diagnosis |
| Professional full-system cleaning | Reaches the hood-to-fan path with containment and documentation | Requires planning, access, and downtime |
Signs your system may need attention
- Smoke escapes from the hood during busy periods.
- Cooking odours remain in the kitchen or dining area.
- Grease appears around duct seams, access panels, the fan, or rooftop curb.
- Filters become saturated or clog faster than before.
- Airflow or capture seems weaker over high-output equipment.
- Maintenance records or service tags are missing or unclear.
- A menu, equipment, operating-hour, or production change has increased grease output.
How to plan the schedule
Use cooking conditions to plan reviews and discuss service frequency with a qualified provider and the applicable authority. The table below is planning guidance, not a universal Ontario legal schedule.
| Kitchen condition | Planning consideration | Review |
|---|---|---|
| Solid-fuel cooking | Plan more frequent review because soot and grease can accumulate quickly. | Fuel type, production, duct condition, and applicable requirements |
| High-volume frying or grilling | Use a tighter plan than a light-duty kitchen. | Operating hours, output, filter loading, and smoke capture |
| Standard restaurant service | Set a documented recurring review based on actual use. | Menu, shifts, previous reports, and observed buildup |
| Light-duty or seasonal use | Lower production may support less frequent review. | Operating periods, reopening plans, and equipment changes |
Related kitchen maintenance
- Filter cleaning or exchange: Maintains removable filters but does not clean ducts or the fan.
- Exhaust fan cleaning: Removes deposits from fan components and can reveal mechanical concerns.
- Fan belt replacement: Addresses belt condition, not grease removal.
- Commercial appliance cleaning: Cleans ovens, grills, refrigerators, and other equipment outside the exhaust route.
- Grease trap cleaning: Manages fats, oils, and solids in wastewater plumbing, separately from hood and duct cleaning.
Bundling compatible services may reduce setup and downtime, but each service should be listed separately in the quote and report.
Pre-booking checklist
- Confirm the hood, plenum, filters, ducts, access panels, and fan are included.
- Ask how rooftop access, wiring, fan equipment, and weather will be handled.
- Confirm floor, wall, appliance, and rooftop containment.
- Discuss degreasing, scraping, rinsing, and wastewater control.
- Choose an off-hours window and clarify when the kitchen can reopen.
- Request photographs, a service tag, and a written report.
- Ask whether belts, access panels, or containment concerns will be documented separately.
- Confirm cleanup responsibilities and any equipment that must be moved.
Questions to ask before hiring
- Will you clean the complete route from hood to exhaust fan?
- How will you reach horizontal ducts, vertical sections, and elbows?
- What protection and containment will you use inside and on the roof?
- What records will we receive after the work?
- How do you determine an interval for our cooking methods and hours?
- Can you separately quote filter exchange, fan belt work, appliance cleaning, or grease trap service?
- What qualifications, insurance, safety procedures, and commercial-kitchen experience does your team have?
Frequently asked questions
Does restaurant grease duct cleaning include the hood and exhaust fan?
It can and should be discussed as a full-system service including the hood, filters, ductwork, and exhaust fan. Confirm the exact scope because some quotes cover only the visible hood or filters.
Can staff clean grease from the ductwork?
Staff can manage accessible surfaces and routine filter procedures. Duct interiors and rooftop fans require appropriate access, containment, equipment, and training, so they should be handled by a qualified professional.
What records should a restaurant retain?
Keep the invoice or report, service date, photographs, service tag, areas cleaned, noted deficiencies, and recommendations with other kitchen safety records.
Is grease trap cleaning included?
Usually, it is separate because a grease trap belongs to the wastewater system. Both services can be scheduled together if the provider offers them and documents each scope clearly.
Choose the right scope before booking
Restaurant grease duct cleaning is most useful when it addresses the complete hood-to-fan path rather than only visible surfaces. Match the schedule to cooking conditions, use routine staff cleaning between visits, and request containment, verification, photographs, tags, and a written report.
For restaurants and commercial kitchens across Ontario, Robinhood Cleaners states that it provides kitchen exhaust cleaning, filter cleaning and exchange, hood and fan work, commercial appliance cleaning, grease trap cleaning, and related ventilation maintenance. Review the proposed scope before scheduling service.