Greater London · Grease filter exchange
Grease filter exchange in Derry Downs, Greater London
Grease filter exchange for businesses, landlords and public buildings in Derry Downs. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Grease left in baffles after washing
- Grease filters clogged with grease
- Grease building up behind the canopy filters
Looking after it afterwards
Results last longer with the right care. We suggest:
- Keep every filter in place during service
- Tell us if the menu or opening hours change
- Keep filter exchange and TR19 cleaning on the same plan
- Always run the extract while cooking
There’s no waiting: the canopy is ready as soon as the clean set is fitted. The dirty set leaves with us for cleaning.
Saturated filters let more grease through. Getting onto a regular exchange now keeps grease out of the plenum and ductwork until the next TR19 clean.
Grease filter exchange for kitchens and businesses in Derry Downs
Think of filter exchange as routine care for the extract. It keeps airflow up and grease down between full cleans and takes a messy task off your team. The full TR19 clean then gives the system its clean bill of health. The work covers mesh filters, baffle filters and wall canopies, and common reasons people get in touch are damaged filters letting grease past and grease collecting in the filter channels.
London kitchens are often tucked into basements or the back of a building, and the duct may run up through several floors before it discharges at the roof. For a kitchen in Derry Downs, that typically means a longer system to clean and more access panels to plan around.
Good records are part of the job. Each visit is written up with photos, listing what was done, anything we couldn’t reach and when the next visit is due. Keep it with your fire safety records so it’s to hand when an insurer or inspector asks.
- Where
- Derry Downs (BR5, BR6)
- Wider area
- Greater London
- Records
- Report and photos after the visit
- Quote
- A fixed quote up front
- Working hours
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Multi-site and managed buildings
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. With shared responsibility, good records help everyone.
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 records stay tidy.
Derry Downs questions
Is parking a problem for work in Derry Downs?
A loading bay, a visitor permit or off-street space near the site in Derry Downs makes the visit easier to plan. Much of our London work is done overnight, which helps.
Do you do school kitchen extract cleaning in Derry Downs in the summer holidays?
Yes. The holidays are the usual time for school work. There are about 3 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Derry Downs. Send us your term dates when you call 0345 646 2711, or email photos, and we’ll fit the work in.
How far ahead should we book?
The more notice, the better, especially for out-of-hours work. Quotes typically come back within one working day, and emergencies are covered by our 24/7 line.
Do you have insurance?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
What does TR19 mean?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It sets out inspection, cleaning and record keeping and expects a risk-based approach.
Do you look at the system first?
Yes. We always survey first, from your pictures and details, or with a visit where needed. Then you get a fixed quote.
Do we need to close the kitchen while filters are changed?
A change takes a short visit, depending on how many filters the canopies hold, so disruption is small. We’ll fit it around your service wherever we can.
Do you clean filters as well as exchanging them?
Yes, that is an option. The first step is looking at the filters you have, as damaged ones may be better replaced.
What staff can safely do
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, they should report it rather than try to fix it. We can diagnose it and quote.
Staff cleaning and specialist work are not the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but they do not reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
Also near Derry Downs
What else we do in Derry Downs
What a clean will not put right
To be straight with you, there are a few things this work won’t fix:
- A heavily greased plenum or canopy, which needs cleaning to TR19
- Grease deep in the extract system
- Cooking smells reaching neighbours, which need odour control
If in doubt, call us on 0345 646 2711 or email us and we’ll say what we think.
What we work on in Derry Downs
- Wall canopies
- Island canopies
- School and hospital kitchens
- Baffle filters
- Mesh filters
- Restaurants and pubs
The process
At the end of the visit, someone from your team can look over the work with us. Anything we couldn’t reach or that needs attention is pointed out there and then, and it goes on the report too. The visit takes a few minutes per canopy, longer for a large kitchen with several canopies. Many London buildings have a managing agent, a security desk or a permit-to-work system, so tell us who to contact in Derry Downs.
- The filters in each canopy are measured and counted.
- An exchange schedule is agreed to suit your cooking.
- On each visit, we remove the greasy filters.
- Clean filters go in and we check they sit snugly.
- We take the greasy set away and confirm the next date.
Preparing for the visit
- Move anything stored near the system
- Tell us the best time to work, such as after service or at a weekend
- Plan for cooking equipment or plant to be off before we arrive
Getting a quote
Every quote begins with a look at the system, either from photos and details you send or from a site visit. After that, you get a fixed price for the work, before work begins.
Read more
What the work involves, part by part
Mesh filters
Older or smaller canopies often use mesh filters. We exchange them on the same basis as baffles.
School, care home and staff kitchens
A longer exchange interval may suit lighter cooking. We agree the schedule to match.
Derry Downs kitchens: local notes
Food Standards Agency data counts about 73 restaurants, cafés and works canteens and about 47 sandwich bars and takeaways within 1.5 miles or so of the middle of Derry Downs. Any of those kitchens with a canopy relies on its filters to catch grease before it reaches the duct. Derry Downs is covered by London Fire Brigade. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel. Most London extract cleaning happens at night, after the last service.
Where a hall near St Andrew's, or anywhere in Derry Downs, hosts lunch clubs or events, its extract gathers grease just as a café’s does. A hospital like Orpington Hospital, about 1.8 miles south-west, is the kind of site where a kitchen may cook for patients, staff and visitors all day. Bursars and site managers at schools such as St Philomena's Primary School tend to book extract cleaning for when the kitchen is empty.
Derry Downs is about 1 mile east of Orpington, in Greater London. Sites in Derry Downs get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where needed and a written report with pictures. Derry Downs is one of 764 towns, villages and districts in Greater London we cover for grease filter exchange. London is in our area too, about 12 miles from Derry Downs.
Every address in BR5 and BR6 is within our area for grease filter exchange, from busy streets to back roads. That includes premises on Kent Road, Park Road and Cross Road and nearby roads. With the A224 close by, Derry Downs is easy for our technicians to reach at any hour. We also cover the places around Derry Downs: Orpington (1 mile west), St Mary Cray (1 mile north-west), Poverest (1 mile north-west), Kevington (1 mile east) and St Paul's Cray (1 mile north). We also work in nearby towns such as London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), St Pancras (14 miles north-west), Shoreditch (13 miles north-west) and Walthamstow (15 miles north-west).
Near you in Derry Downs
Locally, jobs take us to businesses close to Harris Academy Orpington, The Priory School and The Royal Albert pub. Derry Downs’s nearest station is St Mary Cray station, about 0.8 miles north-west. Nearby you’ll also find London Borough of Bromley Museum (0.7 miles south-west) and Lullingstone Castle (3.9 miles south-east). Green spaces nearby include The Warren and Summer Hill.
How we price grease filter exchange
The quote reflects the site in front of us. We take into account:
- One-off work versus a regular cycle
- The condition we find in the survey
- Any permits to work or inductions
- Access, including roofs, risers and ceiling voids
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before work begins.
What to send for a quote
Many jobs can be priced from photos and some basics. Useful things to send:
- Detail shots of panels, filters and grilles
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The postcode and the type of business
- Your last certificate, test record or report
For a fixed quote, give us a ring on 0345 646 2711, or send details by email 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 normally have a quote within one working day.