Hertfordshire · Grease filter exchange
Grease Filter Exchange in Knebworth
For a scheduled grease filter exchange, swapping dirty canopy filters for clean ones in Knebworth, one call is all it takes, from survey to sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- A canopy that drips grease
- Filters left unwashed on busy weeks
- A canopy running with filters missing
What the work involves, part by part
Canopy filter housings
Grease collects in the channels and drip trays below the filters. If it needs attention, we’ll tell you.
School, care home and staff kitchens
Lighter kitchens can often go longer between changes. We agree the schedule to match.
Grease filter exchange in Knebworth
Think of filter exchange as routine care for the extract. Between full cleans, it keeps the airflow healthy and takes a messy task off your team. Full TR19 cleaning still comes at the right interval, with a certificate. If you are dealing with blocked baffle filters and gaps where filters have been removed, we can help.
In a smaller place like Knebworth, 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.
For insurers and inspectors, the record counts. That is why every job is written up in a report with photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Place
- Knebworth (SG3)
- Region
- Hertfordshire
- Records
- Photo report after every visit
- Price
- A fixed price before we start
- Hours
- Out of hours as standard, 24/7 emergency line
- Call
- 0345 646 2711
- Updated
- 30 October 2026
The process
We start by comparing what we find with the survey or your photos. If anything is different, we talk it through with the person on site before carrying on. After that, the work takes anything from a few minutes to an hour or so, depending on the number of filters. In a place like Knebworth, we fit the visit around your hours.
- We look at the canopies and the condition of the filters.
- We note any filters that are bent, damaged or missing.
- Greasy filters are swapped for clean ones.
- We check the filters are seated and the canopy is ready to use.
- We tell you if the plenum or canopy needs a clean.
Before we arrive
- Make sure someone can let us in and lock up afterwards
- Mention any sign-in, permit or induction we need
- Mention any locked doors, roof access or ceiling voids
Ask for a quote
For a fixed quote, give us a ring on 0345 646 2711 or drop us a line and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. You will typically have a quote within one working day.
Advice
What we are called out for in Knebworth
What a kitchen cooks affects how fast filters clog. Fryers, grills and woks load filters faster than ovens and steamers, so the right exchange interval varies.
Look out for any of the following:
- Filters left unwashed on busy weeks
- Grease left in baffles after washing
- Filters that leave gaps in the canopy
- Poor airflow through the filters
A kitchen near Knebworth station that serves breakfast and dinner can run its extract twelve hours or more, which shortens the cleaning interval.
Comparing quotes
- Whether the work can be done while the site is closed
- How they set the interval to the next visit
- What records you’ll receive afterwards
- Whether VAT is included
Why it’s worth doing now in Knebworth
Filters full of grease are fuel sitting right above the cooking. A flare-up on the range can reach them and grease in the duct can carry a fire further. Clean filters mean less fuel in the canopy. Even a site near Knebworth that is only busy part of the week needs its system checked on a schedule.
Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered, and you’ll get one fixed quote.
What you get with us
- Survey first, then a fixed quote
- Full insurance on every job
- Out-of-hours work and a 24/7 emergency line
- Accredited under CHAS and SafeContractor, with ISO 9001
Take a look at how cleaning jobs are priced and how to check a contractor.
When it’s something else
Before booking, it helps to know what’s not included:
- Grease deep in the extract system
- A canopy that needs a proper clean
- Smell complaints that need odour control equipment
If in doubt, ring 0345 646 2711 or send us an email and we will say what we think.
What we work on in Knebworth
- Mesh filters
- Restaurants and pubs
- Island canopies
- Baffle filters
- School and hospital kitchens
- Wall canopies
For landlords and multi-site operators
From a single site to a large estate, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with photos.
When the building owner and the occupier are different, the lease normally sets out who maintains what. We’re happy to deal with either side and send the paperwork to whoever needs it.
Staff cleaning versus specialist work
Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, which is where we come in.
Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.
What grease filter exchange looks like in Knebworth
The FSA’s food hygiene register shows about 13 restaurants, cafés and canteens and about 9 takeaways and sandwich shops in and around Knebworth, up to about a mile and a half out. Clogged filters slow the airflow, and busy kitchens like these clog them fast. Fire safety in Knebworth falls to 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. Kitchens in Knebworth get their food hygiene inspections from North Hertfordshire council. An officer looking round a kitchen will see the canopy, and grease there is hard to miss. Before-and-after pictures from each clean are a simple way to show the extract is in hand.
Kitchens that cook twelve hours or more a day, as some healthcare kitchens do, fall into BESA’s three-monthly minimum; Lister Hospital is the nearest hospital to Knebworth, about 4.2 miles north. If you look after a school kitchen, at a school such as Knebworth Primary and Nursery School or anywhere near Knebworth, the holidays are the usual time for a TR19® clean.
Knebworth is about 3 miles south of Stevenage, in Hertfordshire. Whatever kind of site you run in Knebworth, grease filter exchange is something we can help with. Visits can be booked for evenings, overnight or weekends so trading isn’t interrupted. Our Hertfordshire coverage runs to 381 places, Knebworth among them. For sites nearby, see our London page (26 miles or so).
Grease filter exchange in SG3 is surveyed, quoted and booked the same way as anywhere else. We cover sites on London Road, Deanscroft and Lytton Fields and nearby roads. Other places close to Knebworth include Woolmer Green (1 mile south), Bragbury End (1 mile north-east), Oaklands (2 miles south), Datchworth (2 miles south-east) and Shephall (2 miles north). Larger places within reach include Hemel Hempstead (14 miles south-west), Stevenage (3 miles north), St Albans (10 miles south-west), Bishop's Stortford (15 miles east), Welwyn Garden City (5 miles south) and Harpenden (8 miles south-west).
Local landmarks in Knebworth
Around Knebworth, our work takes us to kitchens and buildings near Barnwell School and Knebworth Park. There’s a railway station in Knebworth itself: Knebworth station. Nearby you’ll also find Benington Castle (3.6 miles north-east) and Datchworth Museum (1.7 miles south-east). Not far away are Mardley Heath.
FAQs for Knebworth
Who would carry out a food hygiene inspection at a kitchen in Knebworth?
That’s North Hertfordshire council, whose environmental health officers carry out food hygiene inspections in Knebworth. Have your latest TR19® certificate and photo report to hand, as an officer may ask how the extract is maintained.
Do you do school kitchen extract cleaning in Knebworth in the summer holidays?
Yes. Half-terms and the summer break are the natural time for school work. The FSA’s register shows about 6 schools and colleges with food registrations within roughly a mile and a half of Knebworth. Send us your term dates when you give us a ring on 0345 646 2711 or use the quote form, and we will fit the work in.
How often should grease filters be changed?
It varies from kitchen to kitchen. The schedule is based on how heavily you cook, and adjust it if needed.
What’s TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It isn’t legislation, but it’s the standard people check against.
Is there a cleaning option for the filters we have?
We offer filter cleaning as well as exchange. We’ll talk you through which suits your kitchen when we quote.
What accreditations do you have?
CHAS, SafeContractor, ISO 9001 and BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. We are fully insured and have been trading since 2009.
Do you offer maintenance contracts?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, to suit the system and how it’s used.
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.