Hertfordshire · Grease filter exchange
Grease filter exchange in Throcking, Hertfordshire
Our technicians work in Throcking on grease filter exchange. Out-of-hours visits, a fixed quote and a written report with photos as standard.
- Gaps where filters have been removed
- Hand-washed filters that still look greasy
- Poor airflow through the filters
What a clean will not put right
Some problems need a different service or another trade:
- Grease behind the filters that a swap cannot remove
- Smell complaints that need odour control equipment
- A fan that’s failing or too weak for the system
Not sure which it is? You can give us a ring on 0345 646 2711 or drop us a line and we’ll tell you honestly before booking.
What we work on in Throcking
- Restaurants and pubs
- Mesh filters
- Baffle filters
- School and hospital kitchens
- Wall canopies
- Island canopies
Grease filter exchange in Throcking, done properly
An exchange visit in Throcking doesn’t take long. The greasy filters come out, clean ones go in and make sure there are no gaps between them. Anything that needs attention is pointed out. If you have grease filters clogged with grease and filter washing that keeps being missed, we can put it right.
In a village or hamlet like Throcking, the kitchens that need extract cleaning are normally 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.
Duct Doctor has been trading since 2009, and we’re 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
- Throcking (SG9)
- Wider area
- Hertfordshire
- Paperwork
- Written report with pictures
- Quote
- A fixed price before work begins
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
Landlords, agents and facilities managers
Multi-site operators often want one contractor and one number. We work across London and the South East, so a run of sites can go into one programme and kept on a regular cycle.
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. Where responsibility is shared, records matter even more.
Kitchen extracts in Throcking
Food hygiene inspections in Throcking are the job of East Hertfordshire council’s environmental health team. Extraction counts as kitchen equipment, so its condition can come up on the day. Our report lists what was cleaned and when, which is useful to have ready. At about 31 miles from central London, Throcking sits well inside the area we cover. We work evenings, overnight and at weekends, so the visit fits around the site.
Bursars and site managers at schools such as Freman College tend to book extract cleaning for when the kitchen is empty. If you run a church or community hall kitchen, near Holy Trinity Church or elsewhere in Throcking, its extract still collects grease from every lunch and event.
Throcking is about 6 miles north-east of Stevenage, in Hertfordshire. Every kind of commercial site in Throcking, we can take on grease filter exchange. Visits can be booked for evenings, overnight or weekends so the site keeps running. Across Hertfordshire, we cover 381 places, Throcking among them. We also work in Chelmsford, around 28 miles away.
Every address in SG9 is within our area for grease filter exchange, from busy streets to back roads. Neighbouring places we cover for grease filter exchange include Cottered (1 mile south-west), Chipping (1 mile north-east), Buntingford (2 miles east), Aspenden (2 miles south-east) and Layston (2 miles east). We also work in nearby towns such as Stevenage (6 miles south-west), Bishop's Stortford (11 miles south-east), Welwyn Garden City (12 miles south-west), Hitchin (9 miles west), Hoddesdon (14 miles south) and Hatfield (15 miles south-west).
What’s near Throcking
Other landmarks nearby include Clothall Castle (4.1 miles west). The countryside around Throcking includes Hawkins Wood.
FAQs for Throcking
Do you work in villages like Throcking?
Yes, Throcking is part of our area, however small the site. The journey is planned ahead, so a few details about the route help.
Can a school canteen extract in Throcking be done out of term time?
Yes, and it’s the easiest time to do it. Around Throcking, the Food Standards Agency lists about 2 schools and colleges with registered kitchens within a mile and a half or so. Tell us your holiday dates and we will book the visit for when the site is empty.
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.
Will I get paperwork for my records?
Yes. It’s the record insurers and inspectors ask to see: a written, dated record with pictures of what we did and anything we couldn’t access.
What if some of our filters are damaged?
A badly damaged filter should be replaced. We’ll show you which ones when we find them.
Can we book visits on a schedule?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. The report from each visit recommends the next date.
Do you offer emergency callouts?
Yes. Our emergency line runs 24/7 for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
How long does the visit take?
It depends on the size of the system, but for a typical site it takes a few minutes per canopy, longer for a large kitchen with several canopies. We will confirm it with the quote.
How the visit works
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool first, and floors and nearby surfaces are sheeted. The work itself takes a short visit, depending on how many filters the canopies hold. Rural roads and tight entrances are worth telling us about before a visit to Throcking.
- We record the number, size and type of your filters.
- An exchange schedule is agreed to suit your cooking.
- The dirty set is lifted out.
- A clean set is fitted and checked for gaps.
- We take the greasy set away and confirm the next date.
Before we arrive
- Mention any parking or loading restrictions
- Dig out any earlier paperwork for the system
- Arrange a key holder or contact on site
Ask for a quote
For grease filter exchange in Throcking, call 0345 646 2711, or email photos. Tell us what kind of premises it is and when it’s open, and send photos or your last report if you can. A fixed quote normally follows within one working day.
Related advice
Keeping the system healthy
Once we have finished, these simple steps help:
- Clear anything stored on or near the canopy
- Report a dripping canopy early
- Don’t refit a filter that is bent
- Keep canopy surfaces wiped down
The canopy looks cleaner and the air moves better right away. Always run the extract during cooking so they catch grease as intended.
Bent or missing filters let grease straight past. Sorting them now keeps grease where it can be caught.
What else we do in Throcking
What happens if it’s left?
Washing filters in-house is an option for kitchens in Throcking, and it works when it’s done well and never skipped. When it does not happen reliably, an exchange makes it automatic. With notice, the visit to Throcking can be fitted around your bookings and events.
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we’ll go through it with you.
Why book with us
- Fully insured
- Fixed quotes, usually within one working day
- Out-of-hours work and a 24/7 emergency line
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
See how cleaning jobs are priced and our accreditations and certificates.
What your team can do, and what needs us
Staff cleaning doesn’t replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you can’t see still need a specialist at the right interval.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We can diagnose it and quote.
What the work involves, part by part
The plenum
Clean filters reduce the grease reaching the plenum, but it still needs cleaning as part of TR19.
Canopy filter housings
The filter housing holds each filter at an angle in the canopy. A damaged housing leaves gaps.