Commercial Kitchen Exhaust Cleaning
One Connected Kitchen Exhaust System
Grease does not stop at the filters, and neither should the cleaning.
A commercial kitchen exhaust system is one connected pathway carrying heat, smoke, airborne grease and cooking vapours from the cooking equipment to the final discharge point.
Grease can pass through the filters, enter the plenum, settle inside horizontal ducts, coat vertical risers, accumulate around elbows, build up on exhaust-fan components or travel through the stages of a PCU.
When one major section is missed, only part of the system has been addressed.
Some systems are compact and relatively straightforward.
Others travel behind finished ceilings, cross several rooms, rise through multiple floors or connect to complex rooftop and pollution-control equipment.
That is why every service should be based on the actual system rather than a one-size-fits-all checklist.
Before work begins, we consider the number of hoods, duct configuration, available access, exhaust-fan design, grease accumulation and whether a PCU or Ecology Unit is present.
When an area cannot be reached safely or properly, we document the limitation rather than pretending it was cleaned.
We would rather provide an accurate report than a certificate that does not reflect the real scope of work.
A Clean Hood Can Still Hide A Dangerous Kitchen Exhaust System
From the kitchen floor, everything may look fine.
The stainless steel is shining, the filters appear clean and there is a recent service sticker attached to the hood.
But a commercial kitchen exhaust system extends far beyond the visible canopy.
Every time your cooking line operates, grease-laden vapours move through the kitchen exhaust hood, filters, plenum, grease ductwork, exhaust fan and, in some systems, a Pollution Control Unit.
A Pollution Control Unit may also be called a PCU or Ecology Unit. These are different names commonly used for equipment that provides additional grease, smoke, particulate and odour control before exhaust air is discharged.
The grease that creates the greatest concern is often the grease nobody can see.
It can collect behind the filters, above ceilings, inside horizontal ductwork, throughout vertical risers, around elbows, on exhaust-fan components and inside a PCU.
Grease may also escape through leaking duct seams, damaged access panels or failed connections.
Above the ceiling, that leakage can contaminate insulation, ceiling tiles, wiring, mechanical equipment and surrounding building materials.
On the roof, grease leaking around an exhaust fan can spread across the roofing membrane, create a dangerous slip hazard and leave combustible deposits near rooftop equipment.
That is why proper commercial kitchen exhaust cleaning should never stop at the shiny hood.
Complete Kitchen Exhaust provides full-system cleaning, grease-duct restoration, fire-rated access-panel solutions, exhaust-fan cleaning, PCU service, deficiency reporting and ongoing maintenance throughout Toronto, the Greater Toronto Area and communities across Southern Ontario.
Since 2013, we have worked with independent restaurant owners, franchise operators, property managers, hotels, retirement residences, institutional facilities, government organizations and multi-location businesses.
We understand that this is more than another piece of equipment.
It is your kitchen, your workplace, your property and the business you have worked hard to build.
Our role is to clean every accessible grease-bearing area included in the service, document the results and tell you honestly when part of the system requires additional access, repair or restoration.
Kitchen Exhaust Hood And Related Components
The shiny hood is only the part you can see.
The kitchen exhaust hood captures heat, smoke and grease-laden vapours directly above the cooking equipment.
It is the most visible part of the system, but it is only the beginning of the exhaust pathway.
Our cleaning scope may include:
- Accessible exhaust-hood and canopy interiors
- Included exterior stainless-steel surfaces
- Baffle filters and grease-removal devices
- Grease cups, troughs and collection channels
- Hood plenums
- Hood-to-duct transition areas
Baffle filters provide the first level of grease separation.
When they become heavily loaded, airflow may be restricted and additional grease may travel into the plenum and ductwork.
The plenum behind the filters is especially important because customers rarely see its condition during normal kitchen operations.
A clean-looking filter bank can hide substantial grease accumulation only inches behind it.
Transition sections also deserve attention.
These areas often contain corners, seams, angled surfaces and ledges where grease can collect before entering the main ductwork.
A polished hood may improve appearance, but the condition behind the filters reveals whether the system is actually being maintained.
Horizontal And Vertical Grease Ductwork
Out of sight should never become out of responsibility.
Grease ductwork carries contaminated exhaust air from the hood toward the exhaust fan and final discharge point.
Much of that ductwork is hidden above ceilings, behind walls or inside vertical shafts.
Horizontal ductwork can collect heavy deposits along its lower surfaces, seams, corners and access openings.
Vertical risers may carry grease-laden exhaust through several floors before reaching the roof.
Elbows, offsets and changes in direction can create additional areas where grease accumulates.
Because these sections are concealed, buildup can continue for years without the restaurant owner, kitchen manager or property manager ever seeing it.
Leaking ductwork creates another serious concern.
Grease may escape through failed seams, damaged access panels or loose connections and spread into the ceiling space.
That leakage can damage ceiling tiles, contaminate insulation and surrounding materials and migrate toward electrical or mechanical components.
By the time a stain, odour or visible drip appears, the problem above the ceiling may have existed for a long time.
Proper grease-duct cleaning may involve:
- Manual scraping
- Commercial degreasers
- Specialized duct-cleaning tools
- Mechanical agitation
- Controlled pressure-washing procedures
- Multiple cleaning passes
- Containment of grease, chemicals and wastewater
Where required and reasonably accessible, grease-bearing duct surfaces are cleaned to bare metal.
When suitable access is missing, we identify the limitation and explain what may be required to reach the affected section.
We will never claim a concealed area was cleaned when there was no practical way to access or inspect it.
Commercial Kitchen Exhaust Fans
The exhaust system does not end when it reaches the roof.
The exhaust fan pulls contaminated air through the entire system.
It operates whenever the cooking line is running, yet it is often one of the most overlooked components.
Commercial kitchens may use rooftop upblast fans, centrifugal fans, utility-set fans or inline exhaust arrangements.
The design may change, but the need for proper access, cleaning and inspection does not.
Accessible fan components may include:
- Fan blades or wheels
- Fan housings
- Motors and belts
- Fan bases and curbs
- Discharge areas
- Hinge kits and restraints
- Grease-containment systems
Grease buildup can affect airflow, balance and operating efficiency.
It may also place additional strain on belts, motors, bearings and related components.
A fan may continue running while performing poorly, meaning the problem may not be obvious from inside the kitchen.
Rooftop grease leakage creates another major concern.
Grease escaping around the fan base can spread across the roof, contaminate nearby equipment and create dangerous slip hazards.
Over time, it may stain, soften or damage the roofing membrane and contribute to expensive repairs.
Missing or damaged hinge kits can also prevent safe fan access.
A suitable hinge kit allows an upblast fan to open without placing unnecessary strain on its electrical wiring or damaging the fan assembly.
Restraints help control the fan while it is open.
We do not ignore the rooftop simply because the customer cannot easily see it.
A clean hood cannot compensate for an exhaust fan that is overloaded, leaking, inaccessible or poorly maintained.
Pollution Control Units (PCUs or Ecology Units)
Different names for one important job: cleaner exhaust before discharge.
A Pollution Control Unit may also be referred to as a PCU or Ecology Unit.
These terms are commonly used for equipment that provides additional grease, smoke, particulate and odour control before exhaust air is released.
PCUs are often found in mixed-use developments, shopping centres, residential areas and other locations where smoke and odour control are especially important.
These systems are more complex than a basic hood, duct and fan arrangement.
A PCU may contain washable grease-removal stages, disposable particulate filters, carbon odour-control filters, internal wash sections, blowers, fans, motors, belts, drains and collection areas.
Not every PCU component can be washed.
Some stages are reusable and require thorough degreasing.
Others are disposable and must be replaced when loaded or saturated.
Complete Kitchen Exhaust can:
- Clean accessible washable PCU components
- Inspect accessible internal surfaces and wash areas
- Identify overloaded or missing filtration stages
- Document visible mechanical or drainage concerns
- Help identify, supply and install applicable replacement filters
When a PCU is neglected, airflow may decline, odour complaints may increase and fans may work harder to move air through restricted filtration stages.
Blocked drains or contaminated collection areas can also contribute to leakage, odours and equipment deterioration.
We clearly explain what was cleaned, what requires replacement and what visible deficiencies were identified.
You should never be left wondering what was actually serviced.
Commercial Kitchen Exhaust Cleaning: How Long Does It Take?
A complete cleaning is not a race to place a sticker on the hood.
The time required to clean a commercial kitchen exhaust system depends on its size, configuration, accessibility and condition.
A small, regularly maintained system may require less time than a large, heavily contaminated or complex system.
However, owners should be cautious when a contractor promises to completely clean every system in one or two hours without first understanding what is involved.
Proper service may require:
- Protecting cooking equipment and surrounding surfaces
- Opening and inspecting accessible duct sections
- Cleaning the hood, filters, plenum and transitions
- Scraping and degreasing horizontal and vertical ductwork
- Opening and cleaning the exhaust fan
- Inspecting the fan base and surrounding rooftop area
- Cleaning accessible PCU stages when present
- Containing grease, chemicals and wastewater
- Taking before-and-after photographs
- Reporting inaccessible areas and deficiencies
- Reassembling the system and leaving the kitchen ready for operation
The quality of the job should not be judged only by how quickly the crew leaves.
It should be judged by what was opened, cleaned, photographed and documented.
Fast is not the same as Complete.
Commercial Kitchen Exhaust Cleaning: Pricing
Similar-looking hoods can hide completely different systems.
It is not responsible to price every commercial kitchen exhaust system as though it were the same job.
One restaurant may have a single hood connected directly to a nearby rooftop fan.
Another may have multiple hoods, long horizontal duct runs, several vertical risers, difficult ceiling access, multiple exhaust fans or a multi-stage PCU.
Pricing and service requirements may be affected by:
- The number and size of exhaust hoods
- The length and configuration of the ductwork
- The number and height of vertical risers
- The number and type of exhaust fans
- The presence of a PCU or Ecology Unit
- Available access panels
- Grease accumulation and carbonization
- Kitchen, ceiling and rooftop accessibility
- Containment requirements
- Restoration work
- Travel and scheduling requirements
A flat price offered without photographs, service history, measurements or an inspection may not account for the work actually required.
The least expensive quote can become very costly when important sections are skipped, grease leakage continues or the system later requires extensive restoration.
Cheap is not the same as qualified.
Areas Of The Kitchen Exhaust System We Can Clean Include
Exhaust Hood And Baffle Filters
Horizontal And Vertical Ductwork
Exhaust Fans
PCU (Pollution Control Unit Or Ecology Unit)
Before And After Photo Documentation Can Be Provided
How We Assess Each Kitchen Exhaust System
If limitations exist, we explain them clearly and document what we see so expectations are understood from the start.
Certification & Documentation
If a system cannot be cleaned to bare metal where required, it cannot be responsibly certified. We do not provide misleading or irresponsible certifications.
All findings, deficiencies and limitations are documented clearly.