Greater London · Grease filter exchange
Grease filter exchange in Cannon Hill, Greater London
Need grease filter exchange in Cannon Hill? We survey first, give you a fixed quote and work around your opening hours, finishing with a written report and pictures.
- A greasy plenum behind the filters
- Grease dripping from the canopy
- Weak extraction at the canopy
How we handle grease filter exchange in Cannon Hill
A clean set of filters is a simple, regular dose of prevention. It keeps airflow up and grease down between full cleans, and it saves your staff a greasy job. Full TR19 cleaning still comes at the right interval, with a certificate. If you have grease filters clogged with grease and gaps where filters have been removed, we can help.
In London, few kitchens can spare a day to close, so work in Cannon Hill is normally booked for the night or the early hours. Parking, loading and access to the roof are agreed with the building before the night of the clean.
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
- Cannon Hill (SW20, SM4, KT3)
- Region
- Greater London
- Records
- Report and pictures after the visit
- Quote
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Checked
- 30 October 2026
What the work involves, part by part
Mesh filters
Layers of mesh catch grease droplets. In a busy kitchen, mesh soon blocks, so they need changing often.
Baffle filters
Baffle filters are robust and widely used in commercial canopies. They do not clean themselves as the collected grease builds up between the blades.
Why act early in Cannon Hill
Some kitchens in Cannon Hill wash filters themselves to save the cost of a service, and that can work if it’s done thoroughly and on time. Where it slips, an exchange service takes the job off staff. A building in Cannon Hill may have flats or offices above and alongside, and a fault in the system can affect them too.
When the work has to happen, how we reach it and how big the site is all affect the cost. Each of those is built into the quote, and the price is fixed before we start.
Why choose Duct Doctor in Cannon Hill
- Ventilation hygiene specialists since 2009
- One number for every site across the South East and London
- A fixed price before any work starts
- Accredited under CHAS and SafeContractor, with ISO 9001
Read what affects the cost or our accreditations and certificates.
Places near Cannon Hill
What else we do in Cannon Hill
How we price grease filter exchange
The diagnosis comes before the price. We look at:
- The size of the system
- How easy every part is to reach
- The number of sites or systems
- Site rules, permits and inductions
A single site or a whole portfolio, the quote is built the same way: the work involved, the access and the timing. You will have a fixed price before work begins.
Asking for a quote
There’s no need for technical detail. It helps if you can send:
- How we’d reach plant on a roof or in a plant room
- Detail shots of panels, filters and grilles
- Any previous report or certificate
- Problems your staff have spotted
Need a price for grease filter exchange? Please call 0345 646 2711 or drop us a line with a few details about the site. We’ll explain what we’d do and send a fixed quote before you commit to anything.
What we do, step by step
The first job on site is protection: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes anything from a few minutes to an hour or so, depending on the number of filters, and we clear up before we go. Expect the work in Cannon Hill to happen after your last customer leaves, not during trading.
- We start by noting how many filters you have and what type they are.
- Together we set how often the filters should be changed.
- Each visit starts with the used filters being removed.
- Clean, dry filters are fitted in their place, with no gaps left between them.
- Anything we notice, such as bent filters or a dirty plenum, is pointed out.
How to prepare
- Let us know how we reach the system, including roofs, risers and plant rooms
- Tell us about site rules, permits or sign-in
- Arrange a key holder or contact on site
Ask for a quote
Quoting starts with a diagnosis, from your pictures and details or, where that isn’t enough, a survey on site. Then we send a fixed price so you know the cost before we start.
Related advice
FAQs for Cannon Hill
Which fire and rescue service is responsible for Cannon Hill?
Cannon Hill is in the area of London Fire Brigade. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.
Can school kitchens in Cannon Hill be cleaned in the holidays?
Yes. The holidays are the usual time for school work. There are about 34 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Cannon Hill. Tell us your holiday dates and we’ll book the visit for when the site is empty.
What paperwork should we keep on file?
The reports and certificates from each visit, plus your own logs. Insurers, fire officers and EHOs may all ask to see them, so keep them where they can be found quickly.
Do we need to close the kitchen while filters are changed?
A filter change is quick and can be timed around service. The canopy shouldn’t be used without filters so the swap is done promptly.
Where do the greasy filters go?
They leave with us. That’s the point of an exchange: you always have a clean set fitted and nothing greasy left on site.
How often should grease filters be changed?
It varies from kitchen to kitchen. We look at your cooking and set an interval to match and can change if your kitchen gets busier.
What does grease filter exchange cost?
Pricing depends on the kitchen, so we need to know the filters and interval first. We send you a fixed quote before the first visit.
Which sectors do you work in?
Any site with a kitchen or a ventilation system to look after, from a single café to a large school. Hotels, schools, care homes, offices, shops and leisure sites are all part of our work.
Honest limits
We’d rather tell you now than book work that will not help, so here are the limits:
- A canopy too small for the cooking beneath it
- A canopy that needs a proper clean
- Grease deep in the extract system
If in doubt, ring 0345 646 2711 or drop us a line and we will say what we think.
Where we work
- School and hospital kitchens
- Wall canopies
- Island canopies
- Restaurants and pubs
- Baffle filters
- Mesh filters
Common problems we fix in Cannon Hill
Cooking vapour carries grease into the canopy. Much of it is trapped by the filters, and day by day they load up and airflow falls away.
Keep an eye out for these warning signs:
- Filters left unwashed on busy weeks
- Grease collecting in the filter channels
- Gaps where filters have been removed
- Grease filters clogged with grease
If you run a church or community hall kitchen, near St James Merton or elsewhere in Cannon Hill, its extract still collects grease from every lunch and event.
Comparing quotes
- Whether the figure could change on the day
- Whether a survey comes first
- What happens if part of the system can’t be accessed
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
Grease, kitchens and Cannon Hill
Food Standards Agency records include about 27 pubs and bars and about 4 hotels and B&Bs within 1.5 miles or so of the middle of Cannon Hill. A pub or hotel kitchen that cooks every day builds up grease in its extract like any other. Most London extract cleaning happens at night, after the last service. Cannon Hill 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.
For kitchens close to South Merton station, where the day often starts early and ends late, the extract can be cleaned overnight. Healthcare kitchens cannot easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Cannon Hill is St. Anthony's Hospital, about 1.5 miles south.
Cannon Hill is about 1 mile north-west of Morden, in Greater London. Every kind of commercial site in Cannon Hill, grease filter exchange is something we can help with. We can work out of hours so trading is not interrupted. Cannon Hill is one of 764 places in Greater London we cover for commercial clients. You can also see our page for London, about 9 miles away.
Work in SW20, SM4 and KT3 is surveyed, quoted and booked the same way as anywhere else. Streets in the area include Aylward Road, Camborne Road and Botsford Road, and we cover them all for grease filter exchange. Neighbouring places we cover for grease filter exchange include Bushey Mead (1 mile north-west), Raynes Park (1 mile west), Wimbledon Chase (1 mile north), West Barnes (1 mile west) and Merton Park (1 mile north-east). We also work in nearby towns such as London (9 miles north-east), City of Westminster (8 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
What’s near Cannon Hill
Typical jobs here are in premises near The Edward Rayne pub, Cannon Hill Common and Harris Academy Wimbledon and the streets around them. The closest station to Cannon Hill is South Merton station, roughly 0.5 miles north-east of the centre. Other landmarks nearby include St. Anthony's Hospital (1.5 miles south) and Wimbledon Museum (1.6 miles north). Green spaces nearby include Cherry Wood and Henman Hill.
Aftercare tips
Once we’ve finished, these simple steps help:
- Do not let the full clean slip because filters are changed
- Never leave gaps in the filter bank
- Never cook with the extract switched off
- Let us know if your cooking hours increase
Fresh filters improve airflow at the canopy straight away. Keep the extract running while you cook so the filters do their job.
If filters are already dripping, they’re overdue. A clean set right away cuts the grease in the canopy, and it’s worth checking the plenum too.