Hertfordshire · Grease filter exchange
Welwyn grease filter exchange
Grease filter exchange for Welwyn, from a team that has been trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Grease filters clogged with grease
- Drips falling from the filters onto equipment
- Smoke and heat lingering under the hood
Welwyn questions
Can school kitchens in Welwyn be cleaned in the holidays?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 11 schools and colleges with food registrations within roughly a mile and a half of Welwyn. Send us your term dates when you call 0345 646 2711 or email us, and we’ll fit the work in.
Who carries out food hygiene inspections in Welwyn?
Kitchens in Welwyn are inspected by Welwyn Hatfield 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 look at the system first?
Yes, every time. We diagnose before we treat: the survey tells us what the system needs and how to reach it, and the quote is based on that.
Which accreditations do you hold?
BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001. We’ve been trading since 2009 and we’re fully insured.
Which sectors do you work in?
Any commercial site with kitchens or ventilation, from a single café to a large school. Hotels, schools, care homes, offices, shops and leisure sites are all part of our work.
Do you work in Welwyn?
Yes. Welwyn is part of the area we cover, within the South East and London area we cover.
What do you do with what you remove?
We take it away at the end of the visit. During the work, it’s contained so the area stays clean.
Does the report say when we need you again?
Yes. We put a recommended next date on the report. BESA’s minimum intervals for kitchen extracts range from 3-monthly for heavy use to 12-monthly for light use, and fire dampers need testing at least once a year.
About our grease filter exchange in Welwyn
A filter that doesn’t sit right lets grease straight past. Gaps in the filter bank are a direct route into the plenum and every filter is checked when we swap them. Damaged filters are flagged so they can be replaced. Typical jobs include staff short of time to wash filters and grease building up behind the canopy filters, on wall canopies, island canopies and school and hospital kitchens.
For a smaller kitchen near Welwyn, 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. We’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Place
- Welwyn (AL6)
- Wider area
- Hertfordshire
- Paperwork
- Written report with pictures
- Quote
- Fixed quote, usually within a working day
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
What else we do in Welwyn
What we’re called out for in Welwyn
Repeated removal and washing takes its toll on filters. A bent filter does not seat properly, leaving gaps for grease to slip through.
Most sites get in touch after spotting something like this:
- Grease collecting in the filter channels
- Weak extraction at the canopy
- Grease dripping from the canopy
- A canopy running with filters missing
School kitchens, at schools like Monk's Walk School for example, are typically cleaned in the holidays so no lunches are lost.
Before booking anyone
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether the whole system is included, or only the parts that are easy to reach
- If the quote is a fixed price or an estimate
- How areas they cannot reach will be recorded
How we price grease filter exchange
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Access, including roofs, risers and ceiling voids
- The times the site is available
- Parking and loading at the site
- Whether several sites go on one quote
Working hours, access and the scale of the site all affect the cost. We take each of them into account and give you a fixed price before any work starts.
Helping us quote
The more you tell us, the more accurate the quote. With your enquiry, please include:
- The times we could work without disrupting the site
- Close-ups of filters, grilles, hatches or access panels
- Photos showing the whole system and its surroundings
- The postcode and the type of business
Quotes are quick. Send a few details and photos, and we usually reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Different parts, different methods
School, care home and staff kitchens
Visits can be planned around holidays and quieter periods so the filters are clean when cooking picks up.
Busy restaurant and pub kitchens
Heavy cooking means more grease reaching every part of the system. Regular changes help protect the ductwork.
The process
There’s very little for your team to do on the day. Someone lets us in at the agreed time and shows us where everything is, and we take it from there. Afterwards, the area is left tidy and the written report follows. Around Welwyn, access is usually simpler than in a town centre, though gates and roof access are worth mentioning.
- First, we check the canopies and the filters in them.
- Any damaged or missing filters are noted.
- Greasy filters are swapped for clean ones.
- The filters are checked for fit before we go.
- Anything that needs attention, such as a greasy plenum, is pointed out.
How to prepare
- Clear loose items from the work area
- Mention any sign-in, permit or induction we need
- Mention any parking or loading restrictions
Getting a quote
The quickest way to a quote is to send pictures: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.
Advice
Why it’s worth doing now in Welwyn
Clogged filters choke the extract. The kitchen gets hotter and smokier, and the fan works harder to pull air through. Keeping filters clean keeps the extract working properly. In a smaller place like Welwyn, a site that has to close is felt quickly.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, and a neglected system can mean more work. If you’re not sure what’s needed, phone us on 0345 646 2711 or send us an email and we’ll give you an honest view and a fixed quote.
Why choose Duct Doctor in Welwyn
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- In business since 2009
- A fixed price before any work starts
- CHAS and SafeContractor accredited, with ISO 9001
Read our cost guide or how to check a contractor.
Grease, kitchens and Welwyn
The FSA’s data shows about 11 pubs, bars and clubs registered within about 1.5 miles of central Welwyn. Breakfasts, bar meals and functions all put grease into the extract wherever they’re cooked. Welwyn is covered by Hertfordshire 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. Kitchens in Welwyn get their food hygiene inspections from Welwyn Hatfield council. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. Keeping each certificate and photo report on file helps show the extract is looked after.
Healthcare kitchens can’t easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Welwyn is Queen Elizabeth II Hospital, about 3.5 miles south. Where a hall near Parish Church of St Mary, or anywhere in Welwyn, hosts lunch clubs or events, its extract gathers grease just as a café’s does.
Welwyn is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. Every kind of commercial site in Welwyn, we can take on grease filter exchange. We can work out of hours so the site keeps running. Across Hertfordshire, we cover 381 places, and Welwyn is one of them. London is in our area too, around 23 miles away.
Grease filter exchange in AL6 is surveyed, quoted and booked the same way as anywhere else. We cover sites on High Street, London Road and Mimram Place and the roads around them. Neighbouring places we cover for grease filter exchange include Monkswood (1 mile south-east), Ayot St Peter (1 mile south-west), Ayot Green (1 mile south-west), Pottersheath (2 miles north) and Codicote (2 miles north-west). Within a short drive, we also cover Watford (14 miles south-west), Hemel Hempstead (12 miles south-west), Stevenage (6 miles north), St Albans (7 miles south-west), Harpenden (6 miles west) and Hitchin (9 miles north).
Near you in Welwyn
Typical jobs here are in premises near Stable Door pub, Danesbury Park and Homerswood Primary and Nursery School and the streets around them. For rail, the closest station is Welwyn North station, roughly 1.1 miles south-east of the centre. Well-known places in the area include Queen Elizabeth II Hospital (3.5 miles south) and Datchworth Museum (2.7 miles north-east). Green spaces nearby include Mardley Heath.
When something else is needed
We won’t sell you work that does not address the problem, so these are the things it won’t cover:
- Grease behind the filters that a swap cannot remove
- A canopy that does not capture the vapour properly
- Smell complaints that need odour control equipment
If in doubt, phone us on 0345 646 2711 or email us and we’ll say what we think before you book.
What the work covers
- Island canopies
- Wall canopies
- School and hospital kitchens
- Mesh filters
- Restaurants and pubs
- Baffle filters
What your team can do, and what needs us
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to us.
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We’ll take a look and give you a fixed quote.