Hertfordshire · Grease filter exchange
Grease filter exchange in Ayot Green, Hertfordshire
Grease filter exchange in Ayot Green from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Filter washing that keeps being missed
- Blocked baffle filters
- Drips falling from the filters onto equipment
When it’s something else
We’d rather tell you now than book work that will not help, so these are the things it won’t cover:
- Extraction problems caused by the fan rather than the filters
- Cooking smells reaching neighbours, which need odour control
- Grease deep in the extract system
If in doubt, give us a ring on 0345 646 2711 or use the quote form and we’ll say what we think before you book.
What the work covers
- Wall canopies
- Island canopies
- School and hospital kitchens
- Baffle filters
- Mesh filters
- Restaurants and pubs
Grease filter exchange for kitchens and businesses in Ayot Green
Each visit is quick and tidy. We lift out the dirty filters and fit a clean set, and we check they’re seated with no gaps. If something looks wrong, we tell you. If you are dealing with grease left in baffles after washing and filters left unwashed on busy weeks, we can help.
Work in a small place like Ayot Green starts with a call to agree access and timings, and the clean itself is the same full TR19® job as in any town: canopy to discharge, then a TR19® certificate and a photo report.
Duct Doctor has been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Where
- Ayot Green (AL6, AL8)
- Region
- Hertfordshire
- Records
- Written report with photos
- Quotes
- A fixed quote up front
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
Nearby places to Ayot Green
What else we do in Ayot Green
What the work involves, part by part
Mesh filters
Mesh traps grease between its layers, which makes hand-washing hard work.
Busy restaurant and pub kitchens
High-output kitchens clog filters quickly. Their exchange schedule is normally the tightest.
Grease, kitchens and Ayot Green
The Food Standards Agency lists about 13 pubs and bars as registered food businesses in Ayot Green and the streets around it, up to about 1.5 miles out. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. Hertfordshire Fire and Rescue Service covers Ayot Green. In most workplaces, including commercial kitchens, it’s the fire and rescue authority that enforces the Fire Safety Order. It’s Welwyn Hatfield council that sends environmental health officers to food businesses in Ayot Green. Extraction counts as kitchen equipment, so its condition can come up on the day. Keeping each certificate and photo report on file helps show the extract is looked after.
If you run a church or community hall kitchen, near Church of St Peter or elsewhere in Ayot Green, its extract still collects grease from every lunch and event. Historic houses near Ayot Green, such as Digswell House about 1.1 miles east, are a reminder that older buildings with event kitchens can have long, awkward duct routes.
Ayot Green is about 2 miles north-west of Welwyn Garden City, in Hertfordshire. We carry out grease filter exchange for businesses, landlords and public buildings in Ayot Green and the rest of Hertfordshire. Ayot Green is one of 381 towns, villages and districts in Hertfordshire where we work for commercial clients. Our London page covers sites nearby (22 miles or so).
We cover every part of the AL6 and AL8 postcode area for grease filter exchange and the streets around it. Grease filter exchange is available to premises on Ayot St Peter Road, Ayot Green and Ayot Little Green Lane and nearby roads. Neighbouring places we cover for grease filter exchange include Ayot St Peter (1 mile north-west), Monkswood (1 mile north-east), Welwyn (1 mile north-east), Ayot St Lawrence (2 miles north-west) and Codicote (3 miles north). Further out, we also cover Watford (13 miles south-west), Hemel Hempstead (11 miles south-west), Stevenage (7 miles north), St Albans (6 miles south-west), Harpenden (5 miles west) and Hitchin (10 miles north).
What’s near Ayot Green
Locally, jobs take us to businesses close to Templewood Primary School, Danesbury Park and The Red Lion pub. The closest station to Ayot Green is Welwyn Garden City station, about 1.4 miles south-east. Nearby you’ll also find Queen Elizabeth II Hospital (2.8 miles south-east) and The Bunker at Hatfield Police Station (3.3 miles south). For a walk, there’s Lemsford Springs.
Common problems we fix in Ayot Green
Long cooking hours in Ayot Green or anywhere else mean more grease on the filters. A kitchen that cooks all day loads its filters quickly, so it needs more frequent changes.
Most sites get in touch when they notice something like this:
- Grease dripping from the canopy
- Blocked baffle filters
- Gaps where filters have been removed
- Bent or damaged filters that don’t sit properly
Healthcare kitchens cannot easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Ayot Green is Queen Elizabeth II Hospital, about 2.8 miles south-east.
Comparing quotes
- What insurance they carry
- What’s included in the scope, part by part
- When the next visit should be, and why
- How areas they can’t reach will be recorded
How it works
Your trading hours come first. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the job takes a few minutes per canopy, longer for a large kitchen with several canopies. Seeing the system in pictures first means the trip to Ayot Green can be planned properly.
- We start by noting how many filters you have and what type they are.
- We agree a schedule that suits how much the kitchen cooks.
- Each visit starts with the used filters being removed.
- Clean, dry filters are fitted in their place, with no gaps left between them.
- We flag any damaged filters or anything wrong with the canopy.
Getting ready for the visit
- Tell us about site rules, permits or sign-in
- Mention any parking or loading restrictions
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Get a fixed quote
Photos are the quickest way to a quote: 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.
Related advice
Between visits
Simple habits between visits make a real difference. We recommend:
- Never cook with the extract switched off
- Clear anything stored on or near the canopy
- Tell us if a filter is bent or damaged
- Tell us if the menu or opening hours change
Your team carries on as normal, without the filter washing. Make sure we can reach the canopy on exchange day and tell us if service times change.
Filter exchange and TR19 cleaning work best together. A maintenance plan that covers both means neither slips.
What staff can safely do
Staff cleaning and specialist work aren’t the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
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.
Landlords, agents and facilities managers
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Every building has its own written report, so each one has its own record.
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 pictures.
FAQs for Ayot Green
Can you clean school kitchen extracts in Ayot Green during the holidays?
Yes. Half-terms and the summer break are the natural time for school work. Food Standards Agency records list about 14 schools, colleges and universities with registered kitchens within about a mile and a half of Ayot Green. You can call us on 0345 646 2711 or use the quote form with the dates the site is empty.
Who would carry out a food hygiene inspection at a kitchen in Ayot Green?
That is Welwyn Hatfield council, whose environmental health officers carry out food hygiene inspections in Ayot Green. An officer may look up into the canopy, so clean filters on the day and a recent certificate on file both help.
Can one contract cover all our sites?
Yes. You deal with one contact for every site in our area, with visits on a regular schedule.
Is filter exchange enough instead of a full extract clean?
It does not. Some grease passes the filters as vapour and settles in the ducts, so the full system still needs cleaning to TR19.
What happens to the dirty filters?
They leave with us. That’s how an exchange works: clean filters in, dirty ones out, with no washing for your team.
Do you have a 24/7 line?
Yes. There’s a 24/7 emergency line for anything that cannot wait until a planned visit. Call us any time and explain what’s happened.
Do you have insurance?
Yes, we are fully insured. We also hold CHAS and SafeContractor, for sites that check contractor safety.
What types of premises do you cover?
Restaurants and pubs, hotels, schools and colleges, hospitals and care homes, offices and retail, plus food production and leisure sites.