Kitchen Exhaust Cleaning in Nepean
Kitchen exhaust cleaning is the part of the job that happens where nobody looks: the vertical riser above the duct collar, the horizontal runs threading through a ceiling void or a service shaft, the access panels along them, and the fan sitting on the roof. Nepean Hood Cleaning Pros cleans that path to bare metal wherever it can be reached, photographs each section separately, and names any inaccessible run on the certificate rather than leaving it unmentioned.
Why the duct matters more than the hood
A hood fire that stays in the hood is a bad night. A hood fire that reaches a loaded duct is a building fire.
The exhaust duct is a sealed steel chimney running from the cook line to the roof, and it is the one part of the system designed to move fire as efficiently as it moves air. Grease condenses along its walls, thickest at the bottom of the riser and around every change of direction, and a coating that would be invisible from the kitchen floor is enough to carry flame the full length of the run. Wet chemical suppression protects the appliances and the plenum. It does not protect thirty feet of duct above them.
That geometry is why NFPA 96 treats the system as one path and why an inspector asks what was cleaned rather than whether the kitchen looks clean. It is also why a hood-only price and a full-system price are not comparable numbers, a point the services overview lays out side by side.
Nepean has a wide spread of building ages, from the older strip plazas along Merivale Road and Robertson Road to the newer retail blocks off Strandherd Drive and Greenbank Road. The newer buildings usually have short vertical runs straight up to a roof fan. The older ones frequently have long horizontal runs, shared shafts and very few access panels, which is where most of the surprises in this trade live.
Hand scraping vs pressure washing a duct: what each is for
Both methods appear on the same job. Choosing only one is how a run gets left loaded or a ceiling gets flooded.
| Factor | Hand scraping | Scraping vs pressure washing |
|---|---|---|
| Where it works | Hardened, carbonised deposit at the base of a riser and around elbows. | Pressure washing clears long straight runs far faster once the hard crust is broken. |
| Water handling | Almost none, so it suits runs above a finished ceiling or a dining room. | Pressure washing needs a controlled fall to a collection point, or the run is washed dry instead. |
| Access required | An opening at each section worth reaching. | Pressure washing can reach further from fewer openings, which matters on an older Nepean building with no panels. |
| Risk if used alone | Slow, and easy to stop short of a section nobody can see. | Pressure washing alone glazes over hard deposit and leaves it bonded to the wall. |
| How this crew uses it | Scrape the loaded sections first, at the collar, the elbows and the fan curb. | Then wash the straight runs down to bare metal and photograph each section before the panels go back. |
Hood-side work is priced from $385 per visit. Duct and rooftop fan work is quoted after the free walk-through, because duct length, the number of access openings and roof height are what actually drive the hours.
The rooftop fan, and why it is on the invoice
The fan is the last thing on the path and the first thing an insurer asks about after a roof claim.
An upblast exhaust fan is hinged so it can be lifted off its curb. Underneath sit the blades, the housing and the top of the duct, all of which collect the grease the rest of the system passed along. A loaded fan runs out of balance, moves less air, and drips onto the roof membrane around the curb, which is where a grease stain turns into a landlord conversation and eventually a roof repair.
Every full exhaust clean here lifts the fan, degreases the blades and housing, cleans the curb and the top of the duct, checks that the hinge and restraining cable still work, and refits the unit level. If the fan cannot be lifted safely, because the hinge has seized or roof access is unsafe in winter conditions, that is photographed and stated on the certificate instead of being quietly skipped.
Roof access is a real variable in this market. A single-storey plaza on Robertson Road is a ladder job. A multi-tenant building off Colonnade Road with a shared roof hatch and a landlord permit process is not, and the walk-through establishes which one applies before the quote goes out.
Where in Nepean a full exhaust clean gets booked most
Duct length and building age, more than cuisine, decide which kitchens need the full path rather than the hood alone.
Older strip retail along Merivale Road and Baseline Road tends to carry long horizontal runs added when a unit changed use, often with a single access panel near the hood and nothing further along. Multi-tenant buildings in the Colonnade Road business park and around Bells Corners can share a shaft between units, which makes coordination with the landlord part of the booking rather than an afterthought. Newer Barrhaven retail near Strandherd Drive and the Marketplace cluster usually has a short, well-panelled run, which is the cheapest version of this job.
Arena, community centre and campus kitchens carry the longest runs of all, and they are also the ones most likely to need the work scheduled into a closure. Those bookings are handled as a documented programme on the commercial hood cleaning page. The areas served page lists the full coverage area.
Questions about kitchen exhaust cleaning
How is kitchen exhaust cleaning different from hood cleaning?
Kitchen exhaust cleaning covers the whole path, from the hood through the riser and horizontal duct to the rooftop fan. Hood cleaning stops at the duct collar. Both are legitimate bookings, but only the full exhaust clean addresses the section a fire actually travels along, which is why a system that has never been cleaned is quoted as a full clean rather than a hood visit.
What happens if part of the duct cannot be reached?
Any unreachable section is photographed, described and named on the certificate, along with what would be needed to reach it, usually a new access panel. Nothing is recorded as cleaned when it was not. That single practice is what makes the certificate worth showing to an inspector or an insurer, and it is the reason the walk-through happens before the quote rather than on the morning of the job.
Does cutting an access panel damage the duct?
No. Access panels are a normal, code-recognised part of a grease duct, and NFPA 96 expects openings at intervals that allow the system to be inspected and cleaned. Panels are cut where the run is otherwise unreachable, fitted with a proper grease-tight cover, and photographed in place. They also make every future visit faster and cheaper.
How long does a full exhaust clean take?
A single-hood kitchen with a short riser and good access is typically one overnight visit. A long horizontal run, several canopies or a difficult rooftop can stretch to two nights, and the written quote states which it will be before the work is booked. Nothing is left half-cleaned overnight; each visit ends with the system reassembled and the kitchen ready for service.
Is the grease taken away afterwards?
Yes. Waste grease, contaminated water and used absorbents leave with the crew, and the roof around the fan curb is cleaned rather than left with the residue pushed to one side. A roof left greasy after a duct clean is a membrane problem and a landlord dispute waiting to happen, and it is one of the things photographed on the way out.