Access Panels in Ductwork: Why Your Kitchen May Need Them Installed

A hood cleaner can only clean what they can reach. If your ductwork has no access panels, or too few, large sections of it are never cleaned. The grease stays, builds up year after year, and sits inside a metal tunnel that runs through your building.

This guide explains what access panels are, why you may need more of them, what the rules say, and what the installation involves.

What is a duct access panel?

An access panel is a removable cover set into your exhaust ductwork. It gives a cleaner a way into the duct so they can see, scrape and wash the inside. When the work is done, the panel is closed and sealed again.

A good access panel is:

• Made of the same material and strength as the duct
• Sealed so it does not leak grease or smoke
• Rated for the heat and fire conditions of a grease duct
• Clearly marked so no one covers or blocks it

A panel that is sealed with ordinary tape, screwed on with gaps, or hidden behind a wall is not doing its job.

Why access panels matter

Grease collects where the duct changes direction. Elbows, bends, horizontal runs and transitions are where grease slows down and settles. These are the same places a cleaner needs a way in.

No access means no cleaning. A cleaner can wipe the hood and the fan and still leave the middle of the duct untouched. That section looks clean from the outside and stays full of fuel on the inside.

It protects you in a fire. Grease in a duct can carry fire through a building quickly. Clean ducts slow that down. Ducts you cannot reach are the ones most likely to fail.

It protects your insurance position. An insurer can dispute a claim if the exhaust was not maintained to the required standard. If the duct was never fully accessible, the record shows it was never fully cleaned.

It protects your inspection result. An inspector who sees a long duct run with no panels will ask how it is being cleaned.

What the rules say

NFPA 96, which the Ontario Fire Code references for commercial cooking exhaust, requires that the ductwork be accessible for cleaning and inspection. In broad terms:

• Access should be provided at changes of direction
• Horizontal ducts need openings at regular points along their length
• Vertical ducts need access at the top or the bottom
• The panels must be sealed and suited to grease duct use
• Ducts that cannot be reached must be given access, or the cleaner must report them as uncleaned

The exact spacing, size and construction details depend on the layout of your system and the edition of the code in force. Confirm what applies to your building with Toronto Fire Services, your mechanical contractor or your insurer before you pay for work.

Signs you need more access panels

1. Your cleaner reports “not accessible” for part of the duct on the service report
2. Long horizontal runs with panels only at the hood or the fan
3. No panels at elbows or bends
4. Panels hidden above a ceiling, behind a wall, or blocked by pipes or equipment
5. Grease leaking at joints, seams or panel edges
6. Heavy grease at the rooftop fan despite regular cleaning, which can mean the middle of the duct is full
7. Your cleaning reports never mention the duct, only the hood and filters

If you see one or more, ask your cleaner for a photo of the inside of the duct and where they stopped.

What happens if you do not install them

• Grease builds up in the sections nobody cleans
• Fire risk rises, because that grease is fuel inside a duct that connects the kitchen to the rest of the building
• Cleaners may refuse or limit the job. A responsible provider should not sign off on a system they could not reach
• An inspector can issue an order to correct the problem
• A claim can be disputed if the records show the duct was never fully cleaned

Installing access costs money once. Ignoring it costs you every year the duct stays dirty.

How access panels are installed

This is not a do-it-yourself job. Cutting into a grease duct affects its fire rating and its seal. It should be done by a qualified contractor, using panels designed for grease ducts.

A typical job looks like this:

1. Survey the duct. The contractor or cleaner maps the duct route, finds the bends and decides where panels are needed.
2. Confirm with the building. If the duct runs through walls, ceilings or shared spaces, you may need the landlord’s permission and access to those areas.
3. Cut and fit the panel. The opening is cut and the panel is installed with a seal that suits grease duct use.
4. Test the seal. The contractor checks that the panel is tight.
5. Label the panel. It is marked so nobody covers or blocks it.
6. Clean the duct. The cleaner uses the new openings to reach what was missed before.
7. Record it. You keep the photos and the service report.

When the duct runs through a fire-rated enclosure or shaft, extra requirements may apply. Ask your contractor to confirm before work starts.

Who is responsible?

In many Toronto buildings, the answer is unclear. The tenant runs the kitchen, the landlord owns the building and the duct runs through shared space. Before you act:

• Check your lease for who is responsible for the exhaust system
• Talk to your landlord or property manager early, especially if panels need to go into walls or shared areas
• Get the work written down, including who pays and who approves it

A fight over who pays is no reason to leave the duct dirty.

Questions to ask your cleaner

1. Can you reach the full duct run today? Where can you not reach?
2. Do you take photos inside the duct?
3. Do you install access panels, or work with a contractor who does?
4. What do you report when part of the duct was not cleaned?
5. Are you insured for work inside ducts?

If a provider tells you the whole system is cleaned but cannot show you duct photos, ask them to prove it.

Quick action checklist

• Read your last service report. Does it mention the duct?
• Ask your cleaner for photos from inside the duct.
• Find your ductwork and count the access panels at bends and long runs.
• Look for hidden, blocked or leaking panels.
• Talk to your landlord about missing access.
• Book a survey and a quote for new panels if needed.

Book a duct inspection and cleaning in Toronto

Discount Hood Cleaner cleans the full exhaust system, from the hood to the rooftop fan, across Toronto and the GTA. If your ducts are hard to reach, we will tell you where access is missing, show you photos, and arrange panel installation so the job gets done properly.