Hertfordshire · Grease filter exchange
Grease filter exchange in Thorley, Hertfordshire
One call covers a scheduled grease filter exchange, swapping dirty canopy filters for clean ones in Thorley, from survey to sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Grease dripping from the canopy
- Filters that leave gaps in the canopy
- Grease collecting in the filter channels
What your team can do, and what needs us
Logging matters as much as cleaning. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. That’s our job.
Grease filter exchange for kitchens and businesses in Thorley
Baffle filters and mesh filters both fill with grease. Once they’re clogged, airflow drops and the extract struggles. Regular exchange keeps the air moving. We are often asked to deal with staff short of time to wash filters and filters so greasy the air can barely pass, on wall canopies, restaurants and pubs and island canopies.
In a village or hamlet like Thorley, the kitchens that need extract cleaning are typically a pub, a school, a care home or a hall kitchen, wherever there is one. Each still has a canopy and duct that collect grease.
We have been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
- Place
- Thorley (CM23)
- Wider area
- Hertfordshire
- Paperwork
- Report and pictures after the visit
- Quotes
- Fixed quote, typically within a working day
- Hours
- Out of hours as standard, 24/7 emergency line
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Aftercare tips
No system stays clean for ever, but care slows the build-up. Our tips:
- Watch for grease drips between visits
- Mention it if the kitchen gets busier
- Tell us if a filter is bent or damaged
- Never cook with the extract switched off
The canopy looks cleaner and the air moves better right away. Always run the extract during cooking so the filters do their job.
Saturated filters let more grease through. A regular cycle keeps the rest of the system cleaner until the next TR19 clean.
What grease filter exchange can’t fix
Some problems need a different service or another trade:
- A canopy that does not capture the vapour properly
- Grease behind the filters that a swap cannot remove
- Greasy ducts and risers that a filter change will not reach
If in doubt, phone us on 0345 646 2711, or email photos and we’ll say what we think before you book.
What the work covers
- School and hospital kitchens
- Restaurants and pubs
- Mesh filters
- Island canopies
- Baffle filters
- Wall canopies
What happens if it’s left?
Grease-loaded filters are a fire risk in their own right. A flare-up on the range can reach them and grease in the duct can carry a fire further. Keeping filters clean takes some of that fuel away. A fault that closes a site in a village like Thorley affects everyone who depends on it.
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. The price is fixed before any work starts.
Why choose Duct Doctor in Thorley
- Survey first, then a fixed quote
- In business since 2009
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- A fixed price before any work starts
What the work involves, part by part
Mesh filters
Layers of mesh catch grease droplets. In a busy kitchen, mesh soon blocks and need frequent attention.
The plenum
The plenum is the space behind the filters. Grease that gets past the filters settles there.
How the visit works
We work around your opening hours, not the other way round. We book the visit for a time the area is closed, whether that is an evening, overnight or a weekend. Once we are in, the area is sheeted and anything that has to be off is turned off and cooled, and the job takes a short visit, depending on how many filters the canopies hold. In a small place like Thorley, the journey is planned ahead and the visit arranged around the site’s hours.
- 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.
- On each visit, the dirty filters come out of the canopy.
- We fit clean filters and check they sit snugly in the housing.
- We flag any damaged filters or anything wrong with the canopy.
How to prepare
- Move anything stored near the system
- Find the previous report, if there is one
- Make sure someone can let us in and lock up afterwards
Ask for a quote
Getting a quote does not take long. Call or email with a few details and you will normally have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Related advice
Questions from Thorley
Will you come out to Thorley?
Yes. Villages and rural sites across the South East are part of our work, Thorley included. Photos of the system and directions to the site help us plan the visit.
Do you do school kitchen extract cleaning in Thorley in the summer holidays?
Yes, and it’s the easiest time to do it. With about 14 schools and colleges on the FSA’s register within roughly a mile and a half of Thorley, it pays to plan holiday dates ahead. You can phone us on 0345 646 2711 or use the quote form with the dates the site is empty.
Is there a survey before the work?
Yes. For many sites, photos and a few details are enough, while bigger or harder-to-see systems are surveyed on site.
What does grease filter exchange cost?
Pricing depends on the kitchen, so we quote once we know your filters and schedule. We send you a fixed quote before the first visit.
What if parts of the system can’t be reached?
The report shows them clearly. In ductwork, new access panels are often the answer, which we can install.
What do you do with what you remove?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on, so it doesn’t spread.
Can you look after several sites?
Yes. Tell us the addresses and what each needs and you will get one fixed quote.
How long does grease filter exchange take?
The work itself takes a short visit, depending on how many filters the canopies hold. Larger systems naturally take longer, and we’ll tell you what to expect.
How we price grease filter exchange
We quote each job individually. These are the things that affect it:
- The size of the system
- Whether several sites go on one quote
- The times the site is available
- A single visit or a regular plan
What you pay depends on how big the system is, what state it’s in and access to every part of it. You get a fixed price before any work starts, so you know where you stand.
What we need to know
Photos let us diagnose from a distance. The most useful are:
- Detail shots of panels, filters and grilles
- A few general shots of the system
- Your last certificate, test record or report
- The postcode and the type of business
Quoting starts with a diagnosis, either from photos and details you send or from a site visit. Then we send a fixed price so you know the cost before we start.
Also near Thorley
More services for Thorley
What grease filter exchange looks like in Thorley
Food Standards Agency data counts about 15 restaurants, cafés and works canteens and about 9 takeaways within about 1.5 miles of central Thorley. Where they cook under a canopy, the grease filters are the first line of defence and clog quickly. It’s East Hertfordshire council that sends environmental health officers to food businesses in Thorley. They look at how clean the premises and equipment are, and the kitchen extract is part of that. A dated certificate in the maintenance file answers the question before it’s asked. Thorley sits within the area of 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.
If your kitchen is in a listed or historic building, like the houses around Thorley (Much Hadham Palace is about 2.9 miles west), fitting access panels needs care. Volunteers running a hall kitchen near Parish Church of St James the Great, or anywhere in Thorley, may not know when the extract was last cleaned, and a grease test settles it. If you look after a school kitchen, at a school such as Richard Whittington Primary School or anywhere near Thorley, the holidays are the usual time for a TR19® clean.
Thorley is about 1 mile south-west of Bishop's Stortford, in Hertfordshire. Whether your site is in the middle of Thorley or further out, we cover grease filter exchange for every kind of premises, from a single unit to a large public building. Across Hertfordshire, we cover 381 places, and Thorley is one of them. Our Chelmsford page covers sites nearby (17 miles or so).
Postcode districts we cover here for grease filter exchange: CM23. We also cover Thorley Street (1 mile east), Spellbrook (1 mile south-east), Bishop's Stortford (1 mile north-east), Little Hallingbury (2 miles south-east) and Allen's Green (2 miles south-west). We also work in nearby towns such as Stevenage (14 miles west), Welwyn Garden City (15 miles west), Hoddesdon (9 miles south-west), Cheshunt (13 miles south-west), Hertford (10 miles west) and Ware (8 miles west).
Near you in Thorley
Around Thorley, our work takes us to kitchens and buildings near Coach And Horses Public House and The Bishop's Stortford High School and the streets around them. Thorley’s nearest station is Bishops Stortford station, about 1.5 miles north-east of the centre. Nearby you will also find Bishops Stortford Local History Museum (2.4 miles north) and Moated mound (3 miles north-west). Open spaces near Thorley include Portingbury Hills and Thorley Wash nature reserve.