Hertfordshire · Extract fan cleaning
Extract Fan Cleaning in Trowley Bottom
Extract fan cleaning across Trowley Bottom and nearby, booked around your opening hours and finished with a written report and pictures.
- Grease around the motor and its mounts
- Grease escaping from the fan outlet
- Less air being pulled from the kitchen
What the work involves, part by part
Roof-mounted fans
Roof fans also discharge grease onto the roof around them and we check the area around the outlet. Heavy staining is noted on the report.
Impellers and blades
The impeller is the spinning part that moves the air, and grease builds up on them unevenly. That is what unbalances the fan, so it’s cleaned carefully blade by blade.
Extract fan cleaning in Trowley Bottom
Every kitchen extract depends on its fan: it pulls air from the canopy, through the duct and out of the building. Grease that gets past everything else ends up on its blades and housing, and that’s what we clean. If you have thick grease on the impeller and casing and grease escaping from the fan outlet, we can put it right, from centrifugal fans, discharge points and in-line fans onwards.
In a small place like Trowley Bottom, kitchens are often in older or extended buildings, with long single-storey duct runs, and those horizontal sections are where grease settles. We agree access and timings in advance.
It’s worth checking any contractor’s accreditations. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Location
- Trowley Bottom (AL3)
- Wider area
- Hertfordshire
- Reporting
- Certificate plus before-and-after pictures
- Quote
- Fixed quote, usually within a working day
- Working hours
- Out of hours as standard, 24/7 emergency line
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Kitchen extracts in Trowley Bottom
The FSA’s data shows about 4 pubs and bars registered in Trowley Bottom 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. Environmental health officers from Dacorum council inspect food businesses in Trowley Bottom. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. Before-and-after pictures from each clean are a simple way to show the extract is in hand. Trowley Bottom sits within the area of Hertfordshire Fire and Rescue Service. Its fire safety officers can audit commercial kitchens, and grease in the extract is part of a kitchen’s fire risk.
If you look after a school kitchen, at a school such as Flamstead Village School or anywhere near Trowley Bottom, the holidays are the usual time for a TR19® clean. Healthcare kitchens can’t easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Trowley Bottom is Hemel Hempstead Hospital, about 4.5 miles south. If your kitchen is in a listed or historic building, like the houses around Trowley Bottom (Childwickbury Manor is about 4.5 miles south-east), fitting access panels needs care.
Trowley Bottom is about 4 miles west of Harpenden, in Hertfordshire. For extract fan cleaning in and around Trowley Bottom, it’s easy to get a fixed quote: please ring 0345 646 2711, or email photos. Our area covers London and the South East, including Trowley Bottom. 381 places in Hertfordshire are on our list, from busy centres to quieter spots. You can also see our page for Milton Keynes, about 21 miles away.
Our technicians cover all of AL3 for extract fan cleaning and the roads nearby. If you need extract fan cleaning at premises on Trowley Hill Road, Trowley Bottom and Wood End Lane or a nearby road, we can help. If your site is just outside Trowley Bottom, we cover Flamstead (1 mile north-east), Friar's Wash (1 mile north-east), Markyate (2 miles north-west), Roe End (2 miles north-west) and Jockey End (2 miles west). Larger places within reach include Watford (11 miles south), Hemel Hempstead (4 miles south), Stevenage (13 miles north-east), St Albans (6 miles south-east), Welwyn Garden City (11 miles east) and Harpenden (4 miles east).
Near you in Trowley Bottom
We work in commercial kitchens and buildings around Rose And Crown Public House and the streets around them. Trowley Bottom’s nearest station is Harpenden station, roughly 3.8 miles east. Other landmarks nearby include Luton Castle (4.4 miles north) and Hemel Hempstead Hospital (4.5 miles south). The countryside around Trowley Bottom includes Landpark Wood.
For landlords and multi-site operators
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We are happy to deal with either side and send the paperwork to whoever needs it.
Whether it’s one building or many, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with photos.
What a clean won’t put right
It’s worth knowing the limits before booking:
- Damaged fan blades
- A fan that won’t start
- A fan that was never right for the kitchen
If you are not sure, just phone us on 0345 646 2711 or email us and we’ll give you a straight answer before you book.
Where we work
- Roof-mounted fans
- Fan housings
- Discharge points
- Axial fans
- Centrifugal fans
- In-line fans
Keeping the system healthy
So the system stays in good health:
- Report rattles or humming early
- Flag smoke lingering at the canopy
- Report grease escaping from the fan
- Make sure the fan is included each time
When the fan is cleaned as part of a full TR19® Grease clean, a TR19 certificate is issued through the BESCA Vent Hygiene Elite portal. If only the fan is cleaned, the photo report says so.
The fan stays cleaner when less grease gets past the canopy. Clean, well-seated filters are the fan’s first protection, and replace any that are damaged.
What happens on the day
Everything the job needs comes with us, from protective sheeting to tools and access equipment. You only need to give us clear access and switch off what needs to be off. On site, the work takes an hour or two for one fan, longer when it’s hard to reach. Somewhere like Trowley Bottom, lanes, gates and parking are worth mentioning in advance.
- The fan is found and its type, access and isolation checked.
- 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.
Before we arrive
- Arrange a key holder or contact on site
- Make sure equipment near the work can be switched off and left to cool
- Tell us where we can park and unload
Getting a quote
There’s no standard price list, because every site is different. We look at your system first, from pictures or on a visit, then send a fixed quote. To get going, call us on 0345 646 2711, or email photos.
Related advice
Your questions about extract fan cleaning in Trowley Bottom
Which fire authority looks after Trowley Bottom?
Fire safety enforcement in Trowley Bottom is handled by Hertfordshire Fire and Rescue Service. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.
Can you work in Trowley Bottom outside opening hours?
Yes, we can come after you close and finish before you open. It means the site in Trowley Bottom keeps running as normal. Just phone us on 0345 646 2711, or email photos with your opening times and we will plan around them.
How often should the extract fan be cleaned?
At least as often as the rest of the extract, which BESA guidance sets by daily cooking hours: every 3, 6 or 12 months. Some fans need attention sooner.
Can you set up regular visits?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. The report from each visit recommends the next date.
How long will it take to clean the fan?
That depends on the fan’s size, its position and how much grease there is. Typically it takes an hour or two for one fan, longer when it’s hard to reach.
Is TR19 a legal requirement?
No. TR19® is BESA’s specification, not legislation. The legal duty comes from the Regulatory Reform (Fire Safety) Order 2005: the responsible person must assess and reduce fire risk, and cleaning to TR19® is the recognised way to show grease is under control.
Can the fan be cleaned between full cleans?
Yes. The report will make clear that only the fan was cleaned, so your TR19 records stay accurate. The whole system still needs cleaning at the intervals in BESA guidance.
Why has my extract fan got louder?
Uneven grease on the impeller often causes it. After cleaning, we’ll tell you if wear or damage is also involved.
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What your team can do, and what needs us
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, alongside our reports.
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to us.
What happens if it’s left?
A fan that fails mid-service can stop a kitchen cooking. Many fan problems start with grease, so keeping it clean is part of keeping it running. We also offer a 24/7 emergency callout if the worst happens. It’s simpler to plan the work at Trowley Bottom now than to arrange it in a hurry later.
We don’t list prices on the website, because each job is priced on what it involves. Call for a fixed quote, and we will explain what it covers.
Why choose Duct Doctor in Trowley Bottom
- A fixed price before any work starts
- Full insurance on every job
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Photo reports with every job
Read what affects the cost or our accreditations.