Southampton · Ductwork cleaning
Ductwork Cleaning in St Denys
Need ductwork cleaning in St Denys? We survey first, give you a fixed quote and work around your opening hours, finishing with a written report and photos.
- A grease test showing the duct is overdue
- Heavy grease at the base of a riser
- Grease leaking from duct joints
What happens on the day
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool before we start, and the area around the work is covered and protected. The work itself takes from a few hours to more than one visit, depending on duct length and access. Evenings, weekends or a closed day all work for a site in a place like St Denys.
- We map the duct route and check where the access panels are.
- Grease readings are taken at set points along the duct.
- Access panels are opened and heavy deposits scraped out by hand.
- Next the ducts and risers are degreased, using whatever suits the deposit.
- Readings and photos are repeated and any section we couldn’t reach is recorded.
Before we arrive
- Allow time for equipment near the work to be turned off and cool down
- Let us know how we reach the system, including roofs, risers and plant rooms
- Let us know when the site is closed or quiet
Getting a quote
We don’t publish a price list, because no two systems are the same. We look at your system first, from photos or on a visit, then send a fixed quote. To get going, phone us on 0345 646 2711, or send details by email.
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About our ductwork cleaning in St Denys
If the ducts in St Denys haven’t been cleaned for a while, or nobody is sure when they were? A few details about the system are a good start when you call us on 0345 646 2711 or send us an email, and a fixed price will follow, normally within one working day. If you have an insurer asking for TR19 evidence and high readings at a recent grease test, we can put it right, from attenuators, access panels and multi-storey ducts onwards.
For a smaller kitchen near St Denys, a TR19® clean is the same job as anywhere: canopy, filters, plenum, duct, fan and discharge. We plan the visit around your hours, with the journey sorted in advance.
Accreditations are easy to claim and worth checking. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Where
- St Denys (SO17, SO18, SO14)
- Wider area
- Southampton
- Records
- TR19® certificate and photo report
- Price
- A fixed quote up front
- Hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
When it’s something else
Before booking, it helps to know what’s not included:
- Ductwork that was poorly designed
- A damper stuck open in the duct
- A worn-out fan that needs replacing
If in doubt, call us on 0345 646 2711, or send details by email and we will say what we think before booking.
What the work covers
- Vertical risers
- Bends and junctions
- Access panels
- Horizontal duct runs
- Multi-storey ducts
- Attenuators
FAQs for St Denys
Do you clean school canteen extracts around St Denys out of term?
Yes, holiday work suits schools best. With about 37 schools and colleges on the FSA’s register within roughly a mile and a half of St Denys, it pays to plan holiday dates ahead. Booking early in the term gives the best choice of holiday dates.
Who inspects food businesses in St Denys?
Kitchens in St Denys are inspected by Southampton council’s environmental health officers. An officer may look up into the canopy, so clean filters on the day and a recent certificate on file both help.
Do you have insurance?
Yes. Duct Doctor is fully insured, and the details are available on request.
Is there a survey before the work?
Yes. Photos often do the job, while bigger or harder-to-see systems are surveyed on site.
Do we have to stop cooking while the ducts are cleaned?
Only while we are working, and we work around you. Overnight and weekend work is common, so no service is lost.
What’s the cleaning interval for extract ductwork?
It depends mostly on daily cooking hours. Heavy use of 12 to 16 hours a day means at least every 3 months, while lighter use can go longer.
How do you know if the ductwork needs cleaning?
Drips, smells and weak extraction are clues, but the only sure way is to measure. A WFTT or DTT reading gives a clear answer.
Which accreditations do you hold?
Our accreditations are CHAS, SafeContractor and ISO 9001, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. The Vent Hygiene Elite scheme is run by BESCA and audited independently.
Aftercare tips
No system stays clean for ever, but care slows the build-up. A few tips:
- Report any grease dripping from duct joints
- Have the grease measured if cooking hours go up
- Don’t switch the extract off early
- Do not block access panels with shelving or stock
The report gives a recommended next clean date, based on the readings and your daily cooking hours, in line with BESA guidance.
Keep to the cleaning interval on the report. If the kitchen starts cooking longer hours, the interval may need to shorten, and grease thickness testing will show it.
What the work involves, part by part
Multi-storey and shared buildings
Ducts in taller or shared buildings often run past other occupiers. Access is planned with the building’s managers, so the clean is done safely and quietly.
Vertical risers
Risers carry the extract up through the building to the roof. Grease collects on the walls and at the foot of the riser, so the base is one of our test points.
St Denys kitchens: local notes
Sea air reaches St Denys, which sits within about 2 miles of the coast. Salt in the air is hard on rooftop fans, discharge cowls and fixings, so we check them for corrosion as well as grease. According to Food Standards Agency records, there are about 64 pubs and bars and about 15 hotels and B&Bs in St Denys and the streets around it, up to about 1.5 miles out. Breakfasts, bar meals and functions all put grease into the extract wherever they’re cooked. St Denys is covered by Hampshire and Isle of Wight Fire and Rescue Service. Fire and rescue authorities enforce the Fire Safety Order in most non-domestic premises, and in a kitchen that fire risk includes the grease in the extract.
For schools such as St Denys Primary School, kitchen extract cleaning is normally booked for the holidays, when the canteen is closed. Healthcare kitchens, like those at hospitals such as Royal South Hants Hospital (about 0.9 miles south-west), often cook for long hours, which puts them in BESA’s heavier-use bands.
St Denys is about 1 mile north-east of Southampton, in Southampton. We provide ductwork cleaning for businesses, landlords and public buildings in St Denys and the rest of Southampton. St Denys is one of 40 places in Southampton we cover for commercial clients.
We work across SO17, SO18 and SO14 for ductwork cleaning and the roads nearby. Whether your site is on Ivy Road, Lawn Road and Kent Road or a nearby road, our technicians can take on the work. You will find St Denys on the A335 and A3035, which makes it straightforward for our technicians to reach for ductwork cleaning. We also cover the places around St Denys: Portswood (1 mile north-west), Bitterne Manor (1 mile south-east), Southampton (1 mile south-west), Bitterne Park (1 mile east) and Inner Avenue (1 mile south-west). We also work in nearby towns such as Maybush (3 miles west), Coxford (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Millbrook (3 miles west) and Weston (3 miles south).
Near you in St Denys
Locally, jobs take us to businesses close to South Western Arms, Riverside Park and St Mary's Independent School and the streets around them. St Denys has its own railway station: St Denys station. Nearby you will also find Royal South Hants Hospital (0.9 miles south-west) and Marlands Shopping Centre (1.5 miles south-west). Not far away are Netley Common.
What happens if it’s left?
Grease left in a duct in St Denys hardens over time. It bakes into a hard layer that takes far longer to remove, so the later the clean, the bigger the job. In a smaller place like St Denys, a site that has to close is felt quickly.
Working hours, access and the scale of the site can all change the price. Each of those is built into the quote, and the price is fixed before we start.
Why choose Duct Doctor in St Denys
- Trading since 2009
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Out-of-hours work and a 24/7 emergency line
- One number for every site across the South East and London
See what affects the cost or our accreditations and certificates.
Signs you need ductwork cleaning in St Denys
The further the air travels from the cooking, the cooler it gets. Cooling air drops its grease onto the inside of the duct, so duct runs keep collecting grease long after the canopy.
Clients usually contact us when they notice one of these:
- Duct runs that can’t be reached
- An insurer asking for TR19 evidence
- Years of grease along the duct floor
- Readings above 200 microns from a grease thickness test
Commuter trade near St Denys station can mean long cooking hours, and long hours put a kitchen into BESA’s more frequent cleaning bands.
Questions to ask before you book
- Whether the quote shows VAT
- What happens if part of the system can’t be accessed
- If the quote is a fixed price or an estimate
- When the next visit should be, and why
Managing agents and facilities teams in St Denys
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we’ll come back with a fixed quote.
If you look after several sites, we can plan visits across the whole estate and price them together. Each site gets its own report and photos, so each one has its own record.