Exhaust Fan Repair and Installation in London
Exhaust Fan Repair and Installation in London is the rooftop half of a commercial kitchen exhaust system: the upblast fan on its curb that pulls smoke and grease vapour off the cooking line and throws it clear of the building. A glazed belt, dry bearings or a burnt-out motor cut the airflow at the hood, and the line has to stop. Hood Cleaning London inspects the fan on the roof, quotes each repair or replacement per job, fits hinge kits and grease containment, and installs fans on new lines across London and the route towns.
Commercial exhaust fan repair: the four parts that fail on a London roof
A kitchen exhaust fan fails in a predictable order, and each stage leaves a sign you can see from the roof hatch.
The belt. Most kitchen fans on London plazas are belt driven. The belt stretches and glazes with heat, starts to slip, and leaves a ring of black rubber dust on the housing.
The bearings. Two bearings carry the shaft that spins the wheel. When their grease dries out, the fan screeches on a cold morning start, then growls under load.
The motor. A motor that overheats trips its breaker, restarts, and trips again. Grease on the windings and a slipping belt both shorten its life.
The curb. The curb is the raised frame that bolts the fan to the roof. An unbalanced wheel shakes it for years, the fasteners loosen, and water finds the gap.
Exhaust fan repair vs replacement in London
The inspection answers one question first: is the housing, shaft and curb still sound. A sound fan gets repaired. A failing frame gets replaced.
| What the inspection finds | Repair vs replace | What the quote covers |
|---|---|---|
| Rubber dust on the housing, weak draw at the canopy | Repair | New belt, pulley alignment checked, tension set and logged. |
| Screech on start-up, hot bearing blocks | Repair | Bearings replaced on the existing shaft, wheel balanced. |
| Motor tripping its breaker, windings coated in grease | Repair or replace the motor | Motor matched to the fan and the electrical supply. |
| Housing rusted through, wheel cracked or bent | Replace the fan | New fan sized to the hood airflow, set on the existing curb. |
| Curb rotted, fasteners pulling out of the deck | Replace fan and curb | Fan and curb together, with a roofer for the membrane tie-in. |
Where to find exhaust fan hinge kit installation near me in London
An exhaust fan hinge kit is the part that decides whether the inside of your fan ever gets cleaned.
A fan bolted flat to its curb has to be unwired, unbolted and lifted off before anyone can reach the wheel. On an icy plaza roof off Wonderland Road at three in the morning, that step is the one that gets skipped. The outside of the housing gets wiped, the certificate gets signed, and the wheel keeps loading with grease.
A hinge kit fixes that. The fan tips back on its curb, a restraint cable holds it open, and the wiring stays connected. Every later visit reaches the wheel and the inside of the housing. Hood Cleaning London fits the kit during a scheduled cleaning, because the crew is already on the roof.
The canopy side of a visit is on the hood cleaning services page.
Rooftop grease containment and the roof membrane
Rooftop grease containment catches what drains from the fan before it reaches the roof.
Every upblast fan weeps some grease from its drain spout. On a flat roof, that grease pools around the curb. It softens the single-ply membranes common on commercial buildings in London, and the soft spot turns into a leak over the cooking line. A containment unit, a tray or a filter box with absorbent media, sits under the spout and holds the grease until the next visit.
Landlord and plaza-management liability is where this gets expensive. A plaza lease on Wellington Road or in Masonville can make the tenant responsible for what their equipment does to the roof. When a roofer photographs a grease-damaged membrane, the repair bill lands with the restaurant, and a roof warranty can be voided on the same finding. Dated photographs of clean containment are your record of reasonable care. Check your own lease before assuming who pays.
Best exhaust fan installation in London for a new cooking line
Exhaust fan installation starts from the airflow the hood was designed for, not from the fan that sat on the roof before.
An undersized fan leaves smoke hanging in the kitchen. An oversized one drags heated air out of the dining room all winter. A pub adding a second fryer line, or a pizzeria putting in a wood-fired oven, needs the fan matched to the new hood. Hood Cleaning London sets the new fan on a new or existing curb and fits the hinge kit and containment in the same job, so the fan is serviceable from its first cleaning.
The wood oven changes the schedule too. Solid-fuel cooking puts the system on the monthly interval, explained on the NFPA 96 page.
Winter roof access in a London snowbelt
Lake-effect snow off Lake Huron reaches London most winters, and a buried fan is still a working fan.
Snow drifts against the curb and ice forms around the drain spout. Containment trays freeze solid with grease and meltwater inside. Winter visits need a clear path from the roof hatch or ladder to the fan, so tell the office who holds the roof key and whether the landlord shovels the roof.
A kitchen with no working exhaust cannot cook safely, so a stopped fan is booked as an urgent call.
How much does exhaust fan repair cost in London in 2026?
Exhaust fan repair, replacement, hinge kits and rooftop grease containment in London are quoted per job after inspection, with the written quote back within 24 hours. For context, a scheduled hood cleaning visit runs from $585 per visit for a single-hood kitchen up to ten feet and from $995 per visit for a multi-hood kitchen of two to four canopies.
The price moves with the fan size, the drive type, the motor, and the state of the curb. A replacement curb brings in a roofer, and that coordination is its own line on the quote. Proof of WSIB coverage and liability insurance comes before work starts. Every service is on the services overview.
Next step: call 226-457-6745 or request a written quote. A phone photo of the fan on its curb helps identify the drive and the hinge kit that fits.
Exhaust fan repair in London: frequently asked questions
Can the kitchen keep cooking with the rooftop fan down?
A cooking line with a stopped exhaust fan has no capture at the hood, so smoke and grease vapour spread through the kitchen. Hood Cleaning London books a stopped fan as an urgent call for that reason.
Who pays for fan repair in a London plaza, the tenant or the landlord?
The lease decides who pays. Many plaza leases put the fan with the tenant and the curb and membrane with the landlord, so the quote lists the fan work and the curb work on separate lines.
What does an exhaust fan hinge kit do?
An exhaust fan hinge kit lets the fan tip back on its curb with the wiring still connected. The wheel and the inside of the housing become reachable at every cleaning instead of being skipped.
How do I know my fan needs rooftop grease containment?
Rooftop grease containment is needed when grease stains, softened membrane or pooling show around the curb or under the drain spout. The inspection photographs the roof around the fan so you can see it.
Does a replacement fan have to be the same model as the old one?
A replacement fan has to match the airflow the hood needs and the curb it sits on, not the brand of the old unit. An original fan that was undersized gets replaced with one sized correctly.