Most restaurants should not choose an exhaust cleaning schedule based on size alone. The better starting point is the cooking profile: fuel type, grease production, equipment mix, and operating volume. A solid-fuel kitchen may need monthly attention, while a lower-volume operation may begin with an annual schedule, subject to review.
These intervals are practical starting points, not universal rules. Your local authority, insurer, equipment condition, menu, and observed grease levels may require a different schedule. In Ontario, applicable cooking exhaust and fire protection systems must be maintained in accordance with NFPA 96, so scheduling is part of a broader safety and maintenance plan.
Quick summary
- Solid-fuel cooking commonly calls for a monthly starting cadence.
- High-volume kitchens often begin with quarterly exhaust cleaning.
- Moderate-volume restaurants may start with semi-annual service, while low-volume operations may start annually.
- Filters usually need attention more often than the full hood, duct, and fan system.
- Review the schedule after adding equipment, changing the menu, increasing production, or noticing visible grease and airflow problems.
Start with your cooking profile
The most useful way to set a restaurant exhaust cleaning frequency is to classify the kitchen by the type and amount of vapour, smoke, grease, and particulate matter it produces. The table below gives typical starting points, not a replacement for assessing your specific system.
| Cooking profile | Typical starting cadence | Why the schedule may be shorter |
|---|---|---|
| Solid fuel, wood, or charcoal | Monthly | Ash, soot, grease, sparks, and heavier particulate loads can accumulate quickly. |
| High volume | Quarterly | Frequent fryer, wok, or grill use creates more grease-laden vapour. |
| Moderate volume | Semi-annually | A standard cook line may produce a manageable load, but seasonal demand still matters. |
| Low volume | Annually | Lower-grease menus and limited cooking hours may support a longer interval, subject to review. |
If your kitchen combines several profiles, use the higher-demand equipment as the starting point and adjust based on actual buildup and service conditions.
What can make your cleaning schedule more frequent?
A schedule should change when the way you cook changes. Adding a fryer, increasing grill production, extending operating hours, or introducing a wood-fired appliance may place a different load on the same hood and duct system.
Fuel and equipment
Solid-fuel appliances can add ash and soot to grease deposits. Fryers, charbroilers, wok lines, and other high-grease appliances can increase residue in filters, plenums, ducts, and exhaust fans.
Volume and seasonal demand
Holiday periods, patio season, catering work, special events, or expanded delivery service can create more cooking hours than the original schedule anticipated.
Observed condition
Visible grease, clogged filters, smoke entering the kitchen or dining area, lingering odours, poor capture, rooftop staining, fan vibration, or worn fan belts are reasons to arrange an inspection or schedule review. These signs do not prove a specific fault, but they suggest the current interval may be too long or that equipment maintenance is needed.
Full exhaust cleaning versus routine kitchen care
Full restaurant exhaust cleaning is not the same as wiping a hood surface or washing a filter. A complete service addresses the grease path through the ventilation system, while other tasks support the system between scheduled cleanings.
- Full exhaust cleaning: Addresses the hood, filters, plenum, ductwork, exhaust fan, and other accessible system components.
- Filter cleaning or exchange: Supports grease extraction and airflow. Filters may require attention more frequently than full duct cleaning.
- Fan maintenance: Includes checking for belt wear, vibration, loose hardware, or restricted movement.
- Daily staff care: Covers routine wiping, grease cup checks, and visible surfaces. It does not replace professional duct and fan cleaning.
- Other kitchen services: Grease trap cleaning, appliance cleaning, power washing, and general degreasing address different parts of the operation.
For a broader maintenance plan, restaurant cleaning services can combine exhaust work with filter cleaning and exchange, grease trap care, and commercial appliance cleaning.
What a complete restaurant exhaust cleaning should cover
When comparing proposals, ask whether the work covers the full accessible exhaust path rather than only the visible hood.
- Hood interior and exterior surfaces where applicable
- Baffle or grease filters
- Plenum and grease collection areas
- Horizontal and vertical duct sections
- Access panels and accessible duct openings
- Exhaust fan housing and blades
- Rooftop termination and grease containment areas
- Relevant ventilation components and visible deficiencies
Cleaning does not automatically correct a damaged fan, worn belt, inaccessible duct, airflow imbalance, or other mechanical concern. The kitchen exhaust system inspection requirements explain why access points, fan condition, grease levels, and service records belong in the same maintenance conversation.
Signs your current schedule may be too long
Use this checklist as a prompt for review, not as a substitute for professional inspection.
- Grease is visible around filters, the hood, duct access points, or the exhaust fan.
- Filters appear clogged, damaged, or unable to support normal airflow.
- Smoke or cooking odours are escaping into the kitchen or dining area.
- The hood seems less effective at capturing vapour.
- Grease staining is appearing on the roof, fan discharge area, walls, or nearby surfaces.
- The exhaust fan vibrates, makes unusual noise, or shows belt wear.
- The menu, equipment, operating hours, or production volume has changed.
- Service tags, photographs, deficiency notes, or the next recommended date are missing.
If several items apply, arrange a condition review and ask whether the exhaust frequency, filter rotation, fan maintenance, or another part of the ventilation plan should change.
How Ontario requirements affect your maintenance plan
Ontario’s Fire Code states that a cooking operation producing smoke or grease-laden vapours must have an exhaust system and fire protection system maintained in accordance with NFPA 96. It also addresses exhaust hoods, grease filtration, and ductwork leading outside unless otherwise approved. Read the applicable provisions in the Ontario Fire Code and commercial cooking equipment requirements.
Ontario’s Food Premises Reference Document says ventilation must be maintained to eliminate odours, fumes, vapours, smoke, and excessive heat. It also cautions against excessive grease buildup because it may contribute to contamination and fire hazards.
Your plan should account for the local authority having jurisdiction, building conditions, equipment manufacturer, and insurer where applicable. The goal is a defensible schedule based on your cooking profile, supported by evidence that the system is being maintained and reviewed.
Documentation checklist for each service
- Service date and business location
- Hood, duct sections, fan, filters, and other areas serviced
- Before-and-after photographs where available
- Visible deficiencies or inaccessible areas
- Service tags or certificates supplied for the work
- Corrective actions completed or still requiring attention
- Recommended next cleaning or inspection date
Records do not guarantee inspection approval, but they provide a clear maintenance history and help identify whether grease is returning sooner than expected.
How to review and adjust the schedule
- Map the system. List each hood, appliance group, duct route, exhaust fan, filter set, and grease containment area.
- Identify high-demand equipment. Note solid-fuel appliances, fryers, grills, wok lines, and equipment used for long service periods.
- Establish a baseline. Record grease levels, filter condition, fan condition, visible staining, and airflow or odour concerns.
- Choose a starting cadence. Use the cooking-profile table, applying the more frequent starting point when profiles are combined.
- Coordinate related tasks. Set separate reminders for filters, fan checks, grease traps, appliances, and daily staff cleaning.
- Reassess after changes. Review the schedule after menu changes, equipment additions, production increases, seasonal peaks, or recurring buildup.
Frequently asked questions
Does every restaurant need exhaust cleaning on the same schedule?
No. Fuel type, grease production, cooking volume, equipment, operating hours, and system condition all affect the starting cadence.
Should filters be cleaned more often than the hood and ducts?
Usually. Filters collect grease during every service, so filter cleaning or exchange should be planned separately from full hood, duct, and fan cleaning.
What should be included in a restaurant exhaust cleaning service?
Ask about the hood, filters, plenum, accessible ducts, access panels, exhaust fan, fan blades, rooftop termination, and grease containment. Confirm how deficiencies and inaccessible areas will be documented.
Should the schedule change after adding a fryer, grill, or solid-fuel appliance?
It may. New equipment can increase grease, smoke, ash, or operating volume, so review the schedule instead of carrying forward an interval designed for the old menu.
Is restaurant exhaust cleaning required under Ontario rules?
Ontario’s Fire Code requires applicable cooking exhaust and fire protection systems to be maintained in accordance with NFPA 96. The exact approach depends on the system and circumstances, so consult the applicable authority and official regulation.
Choose a schedule that matches your kitchen
A sensible restaurant exhaust cleaning schedule starts with the cooking profile, not a generic calendar reminder. Use monthly, quarterly, semi-annual, or annual guidance as a starting point, then adjust for solid fuel, grease-heavy equipment, production volume, seasonal demand, menu changes, equipment condition, and documented observations.
Keep full exhaust cleaning separate from filter care, fan checks, daily upkeep, grease trap service, and appliance cleaning. Review the plan whenever the kitchen changes, and retain clear service records.
Robinhood Cleaners serves Ontario with kitchen exhaust cleaning, filter cleaning and exchange, exhaust fan maintenance, commercial appliance cleaning, grease trap cleaning, and related services, with 24/7 availability for scheduling around restaurant operations.