If you own or manage a restaurant or commercial kitchen in the Greater Toronto Area (GTA), regular hood and exhaust system cleaning is an important part of maintaining a clean and safe kitchen.

During everyday cooking, grease, smoke, heat, and cooking vapours travel through the kitchen exhaust system. Over time, grease can accumulate inside the hood, filters, ductwork, and exhaust fan — including areas that aren’t easily visible from the kitchen.

So, how often should a commercial kitchen hood be cleaned?

There isn’t one cleaning schedule that works for every restaurant. The appropriate frequency depends on your cooking volume, cooking equipment, operating hours, fuel type, and how quickly grease accumulates.

For restaurants across Toronto, North York, Scarborough, Etobicoke, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, and surrounding GTA communities, regular inspection and professional commercial hood cleaning can help maintain a cleaner and safer kitchen environment.

Understanding NFPA 96 Inspection Frequencies

NFPA 96 provides requirements for inspecting commercial kitchen exhaust systems for grease buildup. Inspection frequency varies depending on the type and volume of cooking operation.

A general inspection schedule includes:

✔ Solid-fuel cooking operations — Monthly

✔ High-volume cooking operations — Quarterly

✔ Moderate-volume cooking operations — Semi-annually

✔ Low-volume cooking operations — Annually

High-volume kitchens can include operations involving 24-hour cooking, charbroiling, or wok cooking, while lower-volume facilities may include seasonal or limited-use kitchens.

It is important to understand that these are inspection frequencies. If an inspection identifies grease contamination that requires cleaning, the affected portions of the kitchen exhaust system should be professionally cleaned.

Local requirements and the authority having jurisdiction may also affect the requirements for your particular commercial kitchen.

Why Commercial Kitchen Hood Cleaning Matters

Your kitchen exhaust system works whenever your cooking equipment is operating.

Although hood filters capture some grease, contaminants can gradually accumulate throughout the exhaust system, including:

✔ Hood interiors

✔ Grease filters

✔ Exhaust ductwork

✔ Exhaust fans

✔ Fan housings

✔ Other accessible exhaust-system components

Excessive grease buildup can become increasingly difficult to manage and can contribute to fire-safety concerns.

Professional commercial hood and exhaust cleaning goes beyond cleaning the visible stainless-steel hood. A thorough service considers the system as a whole and focuses on areas where grease and cooking contaminants accumulate.

How Often Does Your Restaurant Need Hood Cleaning?

The right schedule depends largely on how your commercial kitchen operates.

High-Volume Restaurants

Busy restaurants that cook throughout the day can generate significant amounts of grease.

Restaurants with:

✔ Wok cooking

✔ Charbroiling

✔ Frying

✔ Extended operating hours

✔ High daily cooking volumes

may require more frequent inspection and professional cleaning.

Waiting until the hood visibly looks dirty isn’t the best approach. Grease may already be accumulating inside the ducts and around the exhaust fan where restaurant staff cannot easily see it.

Moderate-Volume Restaurants

Many traditional full-service restaurants may fall into a moderate-volume cooking category.

NFPA 96 identifies semi-annual inspection for moderate-volume cooking operations. Whether cleaning is required depends on the condition identified during the inspection.

Cooking style still matters. Two restaurants operating for similar hours can accumulate grease at very different rates depending on their menus and equipment.

Low-Volume Commercial Kitchens

Commercial kitchens that cook less frequently generally accumulate grease more slowly.

NFPA 96 identifies annual inspection for low-volume operations, including certain seasonal or limited-use facilities.

However, lower cooking volume doesn’t mean the kitchen exhaust system should be ignored. Regular inspection is still important for determining its actual condition.

Solid-Fuel Cooking Operations

Commercial kitchens using wood, charcoal, or other solid fuels require additional attention.

NFPA 96 identifies monthly inspection for systems serving solid-fuel cooking operations.

Restaurants using solid-fuel equipment should maintain an appropriate inspection and cleaning program based on their operation and applicable requirements.

Signs Your Hood & Exhaust System May Need Cleaning

Don’t rely only on your scheduled inspection. Restaurant owners and kitchen managers should also watch for changes in the condition and performance of the exhaust system.

Common warning signs include:

✔ Visible Grease Buildup
Sticky or heavy grease deposits around the hood, filters, or accessible exhaust components may indicate that professional cleaning is needed.

✔ Heavily Greased Filters
Filters that quickly become coated with grease can indicate significant grease production within the kitchen.

✔ Persistent Grease or Cooking Odours
Lingering odours may be a reason to inspect the cleanliness and operation of the exhaust system.

✔ Grease Around the Exhaust Fan
Visible grease accumulation around rooftop exhaust equipment should not be ignored.

✔ Reduced Exhaust Performance
If smoke, heat, or cooking vapours aren’t being captured as effectively as expected, the exhaust system should be assessed.

Regular professional inspection can help identify buildup before these issues become more significant.

Commercial Hood Cleaning Is More Than Cleaning the Hood

A common misconception is that restaurant hood cleaning simply means degreasing the stainless-steel canopy above the cooking equipment.

The hood is only one component of a commercial kitchen exhaust system.

Depending on the system and its condition, professional cleaning may include:

✔ Hood Cleaning
Removal of grease and cooking residue from accessible interior hood surfaces.

✔ Hood Filter Cleaning
Cleaning accumulated grease and contaminants from applicable hood filters.

✔ Exhaust Duct Cleaning
Removing grease deposits from accessible areas of the kitchen exhaust ductwork.

✔ Exhaust Fan Cleaning
Cleaning grease buildup from accessible exhaust fan components and surrounding areas.

✔ Grease & Buildup Removal
Addressing accumulated grease and contaminants throughout applicable portions of the exhaust system.

When choosing a commercial hood cleaning company in the GTA, ask what parts of the exhaust system are included rather than comparing companies based only on price.

What Determines Your Hood Cleaning Schedule?

Every restaurant is different.

A busy downtown Toronto restaurant may have completely different cleaning requirements from a smaller commercial kitchen in Vaughan or Richmond Hill.

Similarly, a high-volume wok kitchen in Scarborough or Markham may accumulate grease differently from another restaurant in Mississauga or Brampton.

Your cleaning requirements can be influenced by:

✔ Type of cooking equipment

✔ Cooking volume

✔ Menu and cooking methods

✔ Hours of operation

✔ Type of fuel used

✔ Amount of grease produced

✔ Previous inspection findings

✔ Condition of the exhaust system

✔ Applicable local requirements

A professional assessment can help determine an appropriate inspection and cleaning schedule for your commercial kitchen.

Don’t Wait Until Your Hood Looks Dirty

One of the most important things restaurant owners should remember is:

A clean-looking hood doesn’t necessarily mean the entire exhaust system is clean.

Grease can accumulate in areas you cannot easily see, including ductwork and rooftop exhaust equipment.

A proactive approach to commercial kitchen hood cleaning and exhaust system maintenance can help identify buildup earlier and maintain a more consistent service history.

Keep Records of Your Hood Cleaning Service

Restaurant owners and facility managers should maintain documentation of professional inspections and cleaning services.

Useful records may include:

✔ Date of service

✔ Areas inspected

✔ Areas cleaned

✔ Before-and-after photographs

✔ Findings or recommendations

✔ Recommended follow-up information

Maintaining organized service records makes it easier to understand when your commercial kitchen exhaust system was last inspected or professionally cleaned.

How to Choose a Commercial Hood Cleaning Company in the GTA

Price matters, but it shouldn’t be the only factor when choosing a commercial hood cleaning provider.

Before hiring a company, consider asking:

✔ What parts of my hood and exhaust system will be cleaned?

✔ Are the hood, filters, ducts, and exhaust fan included where applicable?

✔ Do you provide before-and-after documentation?

✔ How do you determine when cleaning is required?

✔ Are your cleaning practices aligned with applicable NFPA 96 requirements?

✔ Can the service be scheduled around our restaurant’s operating hours?

A professional provider should be able to clearly explain the scope of work before the job begins.

Commercial Hood & Exhaust Cleaning Across the GTA

Hood Rangers provides professional commercial hood and exhaust cleaning services for restaurants and commercial kitchens throughout the Greater Toronto Area.

We serve businesses in:

✔ Toronto

✔ North York

✔ Scarborough

✔ Etobicoke

✔ Mississauga

✔ Brampton

✔ Vaughan

✔ Markham

✔ Richmond Hill

✔ Surrounding GTA communities

Our focus is simple: professional workmanship, reliable service, clear communication, and cleaner, safer commercial kitchen environments.

Is Your Commercial Kitchen Due for an Inspection?

If you don’t remember when your hood and exhaust system was last professionally inspected or cleaned, it may be time to assess its current condition.

Hood Rangers can review your commercial kitchen exhaust system, discuss your cleaning requirements, and provide a clear, no-obligation quote.

Request a Free Quote

Keep your restaurant’s hood and exhaust system cleaner, safer, and professionally maintained with Hood Rangers Commercial Cleaning Solutions.

Serving restaurants and commercial kitchens across Toronto and the Greater Toronto Area.

This article provides general information only. Requirements can vary depending on your commercial kitchen, equipment, local authority having jurisdiction, and applicable codes.