Greater London · Extract fan cleaning
Extract Fan Cleaning in Underhill
Extract fan cleaning for Underhill and the surrounding area: diagnosis first, then a fixed quote, the work and a report with photos. Ask us for a fixed quote.
- Vibration from an unbalanced impeller
- A fan that no longer moves enough air
- A smell of hot grease from the extract
Extract fan cleaning for kitchens and businesses in Underhill
In Underhill, as everywhere we work, the fan follows a set routine: isolated first, then opened, scraped and degreased. The result is photographed for your records. Typical jobs include a noisy fan that has got louder over time and burning smells from the fan area, across axial fans, fan housings and roof-mounted fans.
London kitchens are often tucked into basements or the back of a building, with extract ducts that can climb several floors to discharge at roof level. In Underhill, as elsewhere in the capital, a long duct run means more access points to open and more grease to remove.
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.
- Place
- Underhill (EN5, N20)
- Region
- Greater London
- Paperwork
- Certificate and photo report
- Quotes
- A fixed quote up front
- When we work
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Underhill kitchens: local notes
Look up Underhill on the FSA’s food hygiene register and you will find about 108 restaurants, cafés and canteens and about 43 sandwich bars and takeaways within about 1.5 miles of central Underhill. Each kitchen extract among them ends at a fan, and grease on the impeller strains the motor. It’s Barnet council that sends environmental health officers to food businesses in Underhill. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Our report lists what was cleaned and when, which is useful to have ready. Underhill is covered by London Fire Brigade. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel.
If you run a church or community hall kitchen, near St John the Baptist Church or elsewhere in Underhill, its extract still collects grease from every lunch and event. If you run catering at a historic house or estate in the area (Wyllyotts Manor is about 3.4 miles north), event kitchens in older buildings often have awkward duct runs that need planning.
Underhill is about 1 mile west of Barnet, in Greater London. We provide extract fan cleaning for commercial premises of every kind in Underhill and the rest of Greater London. 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 Underhill.
Every address in EN5 and N20 is within our area for extract fan cleaning, from busy streets to back roads. Extract fan cleaning is available to premises on Park Road, May's Lane and Manor Road and nearby roads. We also cover Barnet (1 mile east), New Barnet (1 mile east), Monken Hadley (1 mile north), Hadley Wood (1 mile north-east) and Cockfosters (2 miles east). Further out, we also cover London (11 miles south-east), 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).
Landmarks near Underhill
In Underhill, that means kitchens and buildings near Susi Earnshaw Theatre School, Highlands Gardens and The Red Lion pub and the streets around them. Underhill’s nearest station is New Barnet station, about 1 mile east of the centre. Nearby you will also find Francis Skaryna Belarusian Library and Museum (2.2 miles south) and Barnet General Hospital (0.9 miles west). Open spaces near Underhill include Greenhill Gardens and Darland's Lake.
Nearby places to Underhill
Other services in Underhill
Questions from Underhill
Do you do school kitchen extract cleaning in Underhill in the summer holidays?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 30 schools, colleges and universities with registered kitchens within about a mile and a half of Underhill. Booking early in the term gives the best choice of holiday dates.
Which fire and rescue service is responsible for Underhill?
That’s London Fire Brigade. It’s worth keeping your fire risk assessment, TR19® certificates and photo reports together, ready to show.
Is TR19 cleaning required by law?
No. TR19® itself is not law; it’s a BESA specification. The law is the Regulatory Reform (Fire Safety) Order 2005, which makes the responsible person assess and reduce fire risk, and cleaning to TR19® is the recognised way to show grease is under control.
Do you repair extract fans as well as clean them?
A clean won’t mend wear. We repair and replace extract fans as well, with a fixed quote first.
Do you have insurance?
Yes. Duct Doctor is fully insured, and the details are available on request.
Do you survey before quoting?
Yes, every time. Diagnosis comes before treatment: the survey shows what needs doing and what access we need, and the quote is based on that.
How do you protect the area?
We start with protection: floor sheeting and covers over nearby surfaces and equipment. The area is left tidy, with our waste taken away.
What happens if you can’t reach some of it?
The report shows them clearly. Often the fix is extra access, such as new panels in ductwork, which we can install.
For landlords and multi-site operators
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 records stay tidy.
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
Why deal with it now?
Without a working extract fan, a kitchen cannot cook safely. Many fan problems start with grease, so cleaning the fan helps keep it working. We also offer a 24/7 emergency callout if the worst happens. Choosing the date yourself beats having a fault choose it for you.
One small site or a whole estate, the quote is built the same way: the work involved, the access and the timing. The price is fixed before work begins.
Why choose Duct Doctor in Underhill
- Out-of-hours work and a 24/7 emergency line
- Photo reports with every job
- In business since 2009
- A fixed price before any work starts
What we are called out for in Underhill
By the time air reaches the fan, it has passed the canopy, filters and duct. Whatever grease is still in it settles on the impeller and inside the housing, and the spinning blades fling it onto the walls of the housing.
If you notice any of these, it’s worth a diagnosis:
- A fan motor running hot under a coat of grease
- Less air being pulled from the kitchen
- A heavily greased fan housing
- A fan left out of previous cleans
A hospital like Barnet General Hospital, about 0.9 miles west, is the kind of site where a kitchen may cook for patients, staff and visitors all day.
What your quote should include
- If the quote is a fixed price or an estimate
- What hours they’ll be on site
- How areas they can’t reach will be recorded
- Whether VAT is included
Part by part
Fan housings and motors
Motors and their electrics are kept dry and treated with care, and the fan is isolated throughout. Grease around the motor can make it run hotter, so the surrounding area is cleaned carefully.
Wall fans
The wall around a wall fan can be stained with grease. The outlet is checked as well as the fan.
Between visits
Looking after the system between visits is straightforward, and it makes the next visit easier:
- Flag smoke lingering at the canopy
- Keep access to the fan clear
- Keep each photo report with the maintenance log
- Report rattles or humming early
A full system clean includes a TR19 certificate from the BESCA Vent Hygiene Elite portal. If only the fan is cleaned, the photo report says so.
Make sure the fan is reachable. A fan that can be reached safely is a fan that gets cleaned, whether it’s on a roof, in a ceiling or on a wall.
When something else is needed
We’d rather tell you now than book work that will not help, so here are the limits:
- A faulty speed controller or isolator
- An impeller that is bent or split
- Grease in the duct and canopy before the fan (those need a full TR19 clean)
Not sure which it is? You can call 0345 646 2711 or send us an email and we will tell you honestly before you book.
Where we work
- Roof-mounted fans
- In-line fans
- Fan housings
- Axial fans
- Discharge points
- Centrifugal fans
How the visit works
Your staff do not need to do much on the day. Someone lets us in at the agreed time and shows us where everything is, and we take it from there. Before we leave, the area is tidied and the paperwork follows. In Underhill, as across London, we usually work overnight or at weekends and hand the site back ready to open.
- Diagnosis first: we look for grease, noise and vibration.
- Once isolated, we open the fan up.
- The impeller is cleaned blade by blade so it runs balanced.
- Housing, outlet and the area around the motor are cleaned.
- We run the fan and note its condition in the photo report.
Before we arrive
- Tell us the best time to work, such as after service or at a weekend
- Mention any locked doors, roof access or ceiling voids
- Mention any sign-in, permit or induction we need
Getting a quote
There’s no standard price list, because every site is different. Instead, we look at your site first, from pictures or a survey, then send a fixed quote. To start, give us a ring on 0345 646 2711 or drop us a line.