Commercial HVAC Cleaning Services in Etobicoke
Commercial HVAC cleaning covers the air a building brings in and circulates, as distinct from the grease exhaust it pushes out. Etobicoke Hood Cleaning Pros cleans make-up air units serving commercial kitchens, supply and return ductwork, diffusers and grilles. When a hood stops capturing smoke properly, the cause is frequently not the hood at all. It is that the kitchen has no air left to give the fan.
Air balance, and why a clean hood still smokes
An exhaust fan can only remove air the building lets in. Pull a thousand cubic feet a minute out of a kitchen and a thousand has to come back from somewhere. In a properly balanced kitchen that air arrives through a make-up air unit, tempered, in the volume the exhaust was designed around.
When the make-up air unit is fouled, its filters are blocked, or its supply duct has closed up with dust, the kitchen goes into negative pressure. The symptoms are familiar to anyone who has worked a line: smoke rolling out from under the canopy instead of up into it, doors that pull hard against you, pilot lights that will not stay lit, and cold draughts pouring in through every gap in the building because that is now the only path air has.
The reason it gets misdiagnosed is that all of those symptoms look like an exhaust problem. Kitchens book a hood clean, get one, and the smoke stays. The hood was never the issue.
Grease duct vs HVAC duct: two different jobs
Both are ductwork and the similarity ends there. Confusing them is how kitchens end up paying for the wrong service.
| Point of difference | Kitchen grease duct | HVAC duct |
|---|---|---|
| What it carries | Grease-laden cooking vapour, which is a fuel. | Conditioned air, dust, lint and airborne particulate. |
| Governed by | NFPA 96, adopted by the Ontario Fire Code. | Indoor air quality practice, not a fire code interval. |
| How it is cleaned | Scraped and degreased by hand through access panels. | Brushed and vacuumed with negative-air equipment. |
| Construction | Welded, liquid-tight, with listed access panels. | Sheet metal or flexible, often internally lined. |
| Consequence of neglect | Fire spread through the building. | Poor air quality, higher energy use, a kitchen that will not balance. |
| Certificate issued | Yes, referencing NFPA 96. | A work record and photographs, not a fire code certificate. |
The grease side is covered on the kitchen exhaust cleaning page. Most kitchens need both, on different intervals.
What gets cleaned on the supply side
Etobicoke Hood Cleaning Pros works the supply system in the order the air travels, so nothing cleaned early gets re-contaminated by work done later.
The make-up air unit. The intake screen, filter bank, blower wheel and internal surfaces. A blower wheel loaded with dust moves a fraction of the air its rating claims, and it is the single most common cause of a kitchen that will not balance. Filters are reported and, where you supply replacements, changed.
Supply ductwork. The run from the unit into the kitchen, cleaned through existing access where it exists. Internally lined duct is inspected and reported rather than aggressively brushed, because damaged lining sheds into the airstream and becomes a worse problem than the dust it held.
Diffusers, grilles and returns. The visible fittings, removed, washed and refitted. In a kitchen these load with a film of grease-laden dust that no amount of wiping the face will shift, and they are the part a health inspector can actually see.
The report. Airflow obstructions, damaged flexible duct, missing filters, and any part of the system that could not be reached, all photographed and written down. Balancing a system, replacing a motor or altering ductwork is a mechanical contractor's work, and the report is what you hand them.
How much does commercial HVAC cleaning cost in Etobicoke in 2026?
HVAC cleaning is quoted per unit and per system after a site inspection, because the variables are unit size, duct length and how much of the run is accessible. It is not priced from the same schedule as exhaust cleaning, which starts from $385 per visit, because it is a different job with different equipment.
Most Etobicoke kitchens that book this do it alongside a scheduled exhaust visit, which shares the shutdown and the access and lowers the combined price. Multi-tenant buildings around Rexdale and the 427 corridor sometimes have the make-up air unit under the landlord's control rather than the tenant's, in which case the inspection identifies who owns what before anything is quoted.
The interval is judgement rather than code. Kitchens generally benefit from supply-side cleaning every one to three years, sooner where the intake sits near a loading area, a parking deck or another building's exhaust.
Next step: call 647-370-5780 or request a written quote. Describe the symptom, not the fix. Smoke that will not clear and doors that pull hard tell a technician more than a service name does.
Commercial HVAC cleaning in Etobicoke: frequently asked questions
My hood was just cleaned and the kitchen still smokes. Why?
Almost always make-up air. An exhaust fan can only remove the air the building replaces, so a blocked make-up air unit starves the hood regardless of how clean the canopy is. The check is simple: if the kitchen doors pull hard against you and draughts come in through every gap, the kitchen is in negative pressure and the supply side is the problem.
Do you balance the system as well as clean it?
No. Air balancing is a mechanical contractor's work with calibrated instruments and a commissioning report. Cleaning removes the obstructions that pushed the system out of balance, and the report documents anything still wrong so a balancing contractor starts from evidence rather than guesswork.
Is HVAC cleaning required by the fire code?
No. NFPA 96 governs the grease exhaust system, not the building's supply and return air. HVAC cleaning is done for air quality, energy use and to keep the kitchen balanced. It produces a work record and photographs rather than a fire code certificate.
Who owns the make-up air unit in a leased unit?
It varies, and it is worth establishing before booking. In many Etobicoke plazas and multi-tenant buildings the rooftop mechanical is the landlord's and the tenant is responsible for the kitchen equipment below it. The site inspection identifies which units serve your space and who controls them.
Can you clean flexible ductwork?
Flexible duct is inspected and reported rather than aggressively cleaned. Its internal surface damages easily, and a torn flex liner sheds into the airstream, which is a worse outcome than the dust that was in it. Where flex is badly fouled, replacing the run is the honest recommendation and it goes in the report as such.