Hertfordshire · Extract fan cleaning
Extract Fan Cleaning in Welham Green
Extract fan cleaning for commercial sites in Welham Green and across Hertfordshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- A fan that has never been cleaned
- A motor area thick with grease
- Less air being pulled from the kitchen
What affects the quote in Welham Green
Before we fix a price, we need to know a few things. We look at:
- How many systems or sites are involved
- Working hours and out-of-hours timing
- The size of the system
- Site rules, permits and inductions
Several systems or sites on one quote can make for a more efficient booking. Mention every system or site you need covered, and you’ll get one fixed quote.
Asking for a quote
Many jobs can be priced from photos and some basics. Send what you can of the following:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- The times we could work without disrupting the site
- Detail shots of panels, filters and grilles
- Your last certificate, test record or report
To get a fixed quote, call us on 0345 646 2711, or send details by email with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You will typically have a quote within one working day.
Extract fan cleaning in Welham Green, done properly
Duct Doctor has been cleaning kitchen extract fans since 2009. We’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we are fully insured, with CHAS, SafeContractor and ISO 9001. The work covers in-line fans, centrifugal fans and fan housings, and people most often call us about hot, greasy smells near the fan and a noisy fan that has got louder over time.
In a smaller place like Welham Green, many kitchens sit in older buildings or later extensions, with the duct running through a roof space or up an outside wall. Long horizontal runs like that hold grease and need access panels to reach.
The paperwork matters as much as the work. Each visit is written up with photos, covering the work done, any areas we couldn’t access and a recommended next date. Keep it with your fire safety records so it’s to hand when an insurer or inspector asks.

- Location
- Welham Green (AL9, AL10)
- Wider area
- Hertfordshire
- Paperwork
- Certificate and photo report
- Quotes
- A fixed price before we start
- Hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Updated
- 30 October 2026
Why deal with it now?
Grease on the fan is grease in the system. A TR19 clean that left out the fan wouldn’t cover the whole system and many insurers require the full system to be cleaned to TR19. Booking now means the visit to Welham Green is planned around you, not forced by a breakdown.
The cost depends on the size of the system, what state it’s in and how easy it is to reach. We give you a fixed price before work begins, so there are no surprises.
Why choose Duct Doctor in Welham Green
- Trading since 2009
- Evenings, overnight and weekends, plus 24/7 emergency callout
- A single point of contact for sites across the South East and London
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
Read what affects the cost and our accreditations and certificates.
Common problems we fix in Welham Green
A fan in Welham Green builds up grease at a rate set by the kitchen, not the location: daily hours and the amount of frying and grilling. Under BESA guidance, the whole system, fan included, needs cleaning at least every 3, 6 or 12 months depending on daily hours.
The symptoms we are asked about most include:
- Grease escaping from the fan outlet
- Less air being pulled from the kitchen
- Thick grease on the impeller and casing
- Burning smells from the fan area
Kitchens that cook twelve hours or more a day, as some healthcare kitchens do, fall into BESA’s three-monthly minimum; Queen Elizabeth II Hospital is the nearest hospital to Welham Green, about 3.5 miles north.
Comparing quotes
- What records you will receive afterwards
- What hours they’ll be on site
- If the quote is a fixed price or an estimate
- How areas they cannot reach will be recorded
Grease, kitchens and Welham Green
Look up Welham Green on the FSA’s food hygiene register and you’ll find about 19 cafés, restaurants and staff canteens and about 6 sandwich bars and takeaways in and around Welham Green, up to about a mile and a half out. Any of those kitchens with a canopy relies on a fan that gathers grease as it runs. Environmental health officers from Welwyn Hatfield council inspect food businesses in Welham Green. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. A dated certificate in the maintenance file answers the question before it’s asked. The fire and rescue service for Welham Green is Hertfordshire Fire and Rescue Service. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel.
For kitchens close to Welham Green station, where the day often starts early and ends late, the extract can be cleaned overnight. A hall kitchen that only cooks for events, whether near Church of St Mary the Virgin or elsewhere in Welham Green, still needs its extract cleaned, just less often.
Welham Green is about 2 miles south of Hatfield, in Hertfordshire. Whatever kind of site you run in Welham Green, extract fan cleaning is something we can help with. Visits can be booked for evenings, overnight or weekends so trading is not interrupted. We cover 381 places across Hertfordshire, large and small. For sites nearby, see our London page, about 17 miles away.
Here we cover the AL9 and AL10 postcode area for extract fan cleaning. Streets in the area include Station Road, Old Farmhouse Mews and Vincenzo Close, all of which we cover for extract fan cleaning. We also cover North Mymms (1 mile south), Colney Heath (1 mile west), Hatfield (2 miles north), Sleapshyde (2 miles west) and Smallford (3 miles north-west). Further out, we also cover Watford (9 miles south-west), Hemel Hempstead (10 miles west), Stevenage (12 miles north), St Albans (5 miles west), Welwyn Garden City (4 miles north) and Harpenden (8 miles north-west).
What’s near Welham Green
Around Welham Green, our work takes us to kitchens and buildings near Brookmans Park, The Hope and Anchor Public House and Chancellor's School, among other places. There’s a railway station in Welham Green itself: Welham Green station. Other landmarks nearby include Queen Elizabeth II Hospital (3.5 miles north) and The Bunker at Hatfield Police Station (2.3 miles north). Open spaces near Welham Green include Gobions Wood.
Questions from Welham Green
Who is the fire and rescue service for Welham Green?
That is Hertfordshire Fire and Rescue Service. Records of extract cleaning are a sensible thing to have ready if a fire safety officer carries out an audit.
Can you come to Welham Green after we close?
Yes, we can come after you close and finish before you open. The site is handed back ready to open. Let us know the hours you are closed and we will book within them.
Is TR19 cleaning required by law?
Not in itself. Insurers, fire officers and EHOs look to TR19® as the benchmark, and many insurance policies ask for proof of TR19® cleaning. The legal duty sits in the Regulatory Reform (Fire Safety) Order 2005 in England and Wales.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before work begins, and anything we remove is contained. Before we leave, we tidy up and clean down.
How long is a fan clean?
A single accessible fan does not take long, but hard-to-reach fans take more time. We plan it out of hours.
What should I send you?
The site address, the type of premises and your opening hours, plus photos of the system and your last certificate or report if you have one.
What types of premises do you cover?
Any commercial site with kitchens or ventilation, from a small pub to a hospital. We work with hotels, schools, care homes, offices, retail and leisure sites.
How far ahead should we book?
Book as early as you can for planned work, particularly if your next visit is nearly due. Emergencies are different, because our line is open 24/7.
Multi-site and managed buildings
Running several sites is easier with one contractor. We cover South East England and London, so a run of sites can go into one programme and kept on a regular cycle.
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we are happy to quote for all of it.
Looking after it afterwards
Results last longer with the right care. Here’s what we suggest:
- Listen for new noises or vibration from the fan
- Check the report shows the fan was cleaned
- Keep records of every fan clean
- Do not store items in front of the fan’s access point
If the fan needs more than a clean, we will say so plainly. We also repair and replace extract fans, so you have one point of contact.
Do not run the kitchen with the extract off. Grease settles faster when the air stops moving, so keeping it running helps keep it clean.
The process
Before we leave, we walk the area with whoever is on site. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. All told, the work takes a few hours where there are several fans or heavy deposits. Getting to the system matters more than parking in a place like Welham Green, so let us know how to reach it.
- We start by checking where the fan sits and how to isolate it.
- The fan is isolated so it cannot start while we work.
- Grease is scraped from the impeller blades and the inside of the housing.
- We degrease the fan and housing, taking care around the motor.
- It’s closed up, run and checked, and photos go into your report.
Before we arrive
- Have your last certificate or report to hand
- Move anything stored near the system
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Getting a quote
Need a price for extract fan cleaning? Please call us on 0345 646 2711 or use the quote form with a few details about the site. We will talk you through the work and send you a fixed quote before you commit to anything.
Related advice
What a clean will not put right
A few issues sit outside what this work can do:
- Wiring faults to the fan
- A motor that has burnt out
- A fan that was never right for the kitchen
Not sure which it is? You can phone us on 0345 646 2711 or use the quote form and we will tell you honestly before booking.
What the work covers
- Discharge points
- In-line fans
- Centrifugal fans
- Fan housings
- Roof-mounted fans
- Axial fans