Greater London · Extract fan cleaning
Extract Fan Cleaning in Barnet
For extract fan cleaning in Barnet, one call is all it takes: survey, fixed quote, work and sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Vibration from an unbalanced impeller
- Fat spreading onto the roof or wall by the fan
- A fan motor running hot under a coat of grease
How we handle extract fan cleaning in Barnet
Duct Doctor has been cleaning kitchen extract fans since 2009. As a BESCA Vent Hygiene Elite member, we clean to BESA TR19® Grease, with CHAS, SafeContractor and ISO 9001 and full insurance. Typical jobs include a noisy fan that has got louder over time and a fan left out of previous cleans, across axial fans, roof-mounted fans and centrifugal fans.
Across London, many commercial kitchens are squeezed into basements and narrow back-of-house spaces, and the duct may run up through several floors before it discharges at the roof. For a kitchen in Barnet, that normally means a longer system to clean and more access panels to plan around.
Good records are part of the job. Each visit is written up with pictures, listing what was done, anything we couldn’t reach and when the next visit is due. Keep it with your fire safety records so it’s to hand when an insurer or inspector asks.
- Place
- Barnet (EN5, EN4, N20, N11)
- Region
- Greater London
- Records
- Certificate and photo report
- Price
- A fixed quote up front
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Kitchen extracts in Barnet
The Food Standards Agency lists about 32 bars, pubs and nightclubs as registered food businesses across Barnet and its immediate surroundings (about a mile and a half). Wherever they cook, the canopy, duct and fan collect grease just as a restaurant’s do. Food hygiene inspections in Barnet are the job of Barnet council’s environmental health team. They look at how clean the premises and equipment are, and the kitchen extract is part of that. Keeping each certificate and photo report on file helps show the extract is looked after. In London, kitchens are typically cleaned overnight, when the kitchen is closed and loading is easier.
A kitchen near New Barnet station that serves breakfast and dinner can run its extract twelve hours or more, which shortens the cleaning interval. A hall kitchen that only cooks for events, whether near St John's United Reformed Church or elsewhere in Barnet, still needs its extract cleaned, just less often.
Barnet is about 9 miles east of Watford, in Greater London. Anywhere in EN5, we cover extract fan cleaning for commercial sites. Our area takes in 764 places across Greater London, from busy centres to quieter spots. There’s also a page for London, roughly 11 miles from Barnet.
Extract fan cleaning in EN5, EN4, N20 and N11 follows the same survey, fixed quote and written report as everywhere else we cover. Local streets include Station Road, High Street and Sambroke Square, all of which we cover for extract fan cleaning. Main roads around Barnet include the B193 and A1081, which makes travel easy for extract fan cleaning. Neighbouring places we cover for extract fan cleaning include Underhill (1 mile west), New Barnet (1 mile east), Monken Hadley (1 mile north-west), Hadley Wood (1 mile north-east) and Cockfosters (1 mile east). Larger places within reach include London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (9 miles south) and Shoreditch (10 miles south-east).
Near you in Barnet
Around Barnet, our work takes us to kitchens and buildings near Queen Elizabeth's Girls' School, The Railway Tavern and Highlands Gardens, among other places. For rail, the closest station is New Barnet station, roughly 0.6 miles east of the centre. Nearby you’ll also find Barnet General Hospital (1.2 miles west) and Francis Skaryna Belarusian Library and Museum (2.1 miles south). Open spaces near Barnet include Darland's Lake and Greenhill Gardens.
How the visit works
At the end of the visit, someone from your team can look over the work with us. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. The visit takes an hour or two for most single fans. In a London area like Barnet, parking, loading and building access are planned before the day of the work.
- We locate the fan and plan how to reach and isolate it.
- We isolate the power before opening the housing.
- Grease is scraped off the impeller blades and casing.
- The fan is degreased, taking care around the motor.
- We reassemble, run and photograph the fan.
Preparing for the visit
- Have your last certificate or report to hand
- Name a contact who can let us in at the agreed time
- Mention any locked doors, roof access or ceiling voids
How to get a quote
To help us quote: the address, the type of site and when it’s open, a few photos and any previous report or certificate. Then call 0345 646 2711 or drop us a line.
Related advice
When something else is needed
An honest diagnosis matters more to us than a booking, so here’s what extract fan cleaning will not do:
- A fan that was never right for the kitchen
- An impeller that’s bent or split
- A faulty speed controller or isolator
Not sure which it is? You can give us a ring on 0345 646 2711 or drop us a line and we’ll tell you honestly before booking.
What we work on in Barnet
- Discharge points
- Roof-mounted fans
- In-line fans
- Fan housings
- Centrifugal fans
- Axial fans
Between visits
Looking after the system between visits is straightforward, and it helps at the next visit:
- Note any drop in extraction at the canopy
- File the fan’s report with your other records
- Keep access to the fan clear
- Run the extract throughout cooking
Where the fan needs repair rather than cleaning, the report says so. We also repair and replace extract fans, so you have one point of contact.
A change in how the fan sounds is worth noting. New noise or vibration often means grease is building on the impeller and early action can save a repair.
How the job changes from site to site
Wall fans
A wall fan pushes the air straight outside. We isolate it, then clean the blades and housing.
Inline duct fans
An inline fan can be easy to forget because it’s out of sight. We find it during the survey and include it in the clean.
Your questions about extract fan cleaning in Barnet
Can a school canteen extract in Barnet be done out of term time?
Yes, out-of-term visits are normal for schools. Food Standards Agency records list about 36 schools, colleges and universities with registered kitchens within about a mile and a half of Barnet. Tell us your holiday dates and we’ll book the visit for when the site is empty.
Can you work in Barnet outside opening hours?
Yes, evening, overnight and weekend work is normal for us. Your customers, staff or residents in Barnet needn’t be disturbed. Just phone us on 0345 646 2711, or send details by email with your opening times and we will plan around them.
Why has my extract fan got louder?
Often it’s grease on the impeller. Grease collects unevenly and unbalances the impeller, causing vibration and noise. If cleaning doesn’t, the bearings or motor may need attention.
Can you look after several sites?
Yes. We work across South East England and London, so we can schedule a run of sites as one programme. Each site gets its own report and photos.
Where does the waste go?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on, so it doesn’t spread.
How far ahead should we book?
Book as early as you can for planned work, particularly if your next visit is nearly due. For emergencies, we take calls 24/7.
Do you have a 24/7 line?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we will advise on what to do next.
Which accreditations do you hold?
We hold CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
What affects the quote in Barnet
A fixed price needs a few facts first. We look at:
- The condition of the system
- Travel, parking and unloading
- Working hours and out-of-hours timing
- One-off work versus a regular cycle
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all play a part.
What to send for a quote
There’s no need for technical detail. It helps if you can send:
- Detail shots of panels, filters and grilles
- The site address and the type of premises
- Any previous report or certificate
- Where the plant sits or the system leaves the building, such as a roof or outside wall
Photos are the quickest way to a quote: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
What your team can do, and what needs us
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.
More services for Barnet
When to call us in Barnet
The cooler the air, the more grease drops out, and on a roof or outside wall the fan can be in some of the coolest air in the system. That makes it a natural place for grease to settle.
These are the problems we see most often:
- A fan motor running hot under a coat of grease
- Grease escaping from the fan outlet
- Less air being pulled from the kitchen
- A fan left out of previous cleans
Bursars and site managers at schools such as Grasvenor Avenue Infant School tend to book extract cleaning for when the kitchen is empty.
What to look for in a quote
- What paperwork you get at the end
- Whether inaccessible sections are listed on the report
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- If they look at the system before pricing