Hampshire · Grease filter exchange
Knowle grease filter exchange
One call covers a scheduled grease filter exchange, swapping dirty canopy filters for clean ones in Knowle: survey, fixed quote, work and sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- A canopy that drips grease
- Filters so greasy the air can barely pass
- Grease left in baffles after washing
About our grease filter exchange in Knowle
Grease filters are the first line of defence in a kitchen extract. Their job is to stop grease getting further into the system and they do it best when they’re clean. With grease filter exchange, clean filters replace greasy ones at regular intervals. If you have blocked baffle filters and weak extraction at the canopy, we can put it right, from wall canopies, island canopies and restaurants and pubs onwards.
Somewhere as small as Knowle, commercial kitchens are few: perhaps a pub, a school or care home kitchen, or a hall used for events. Each still has a canopy and duct that collect grease.
We’ve 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’re fully insured.
- Where
- Knowle (PO17)
- Region
- Hampshire
- Records
- Photo report after every visit
- Quotes
- A fixed price before work begins
- Working hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Aftercare tips
How long the results last depends on use and care. Here’s what we suggest:
- Never cook with the extract switched off
- Don’t refit a filter that is bent
- Report a dripping canopy early
- Don’t let the full clean slip because filters are changed
Fresh filters improve airflow at the canopy right away. Always run the extract during cooking so they catch grease as intended.
If cooking has stepped up, the filter schedule should too. Changing the interval early stops grease building up unseen in the ducts.
Towns and villages near Knowle
Also in Knowle
Landlords, agents and facilities managers
Running several sites is easier with one contractor. We cover South East England and London, so a run of sites can go into one programme and kept on a regular cycle.
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we will send a fixed quote.
Grease filter exchange around Knowle
Food Standards Agency records include about 3 pubs and bars in and around Knowle, up to about a mile and a half out. Any of them serving cooked food has an extract to keep clean, from canopy to discharge. Fire safety in Knowle falls to Hampshire and Isle of Wight 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. Food hygiene inspections in Knowle are the job of Winchester City 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.
Bursars and site managers at schools such as Orchard Lea Infant School tend to book extract cleaning for when the kitchen is empty. Healthcare kitchens, like those at hospitals such as Knowle Hospital (about under half a mile north-east), often cook for long hours, which puts them in BESA’s heavier-use bands.
Knowle is about 2 miles north of Fareham, in Hampshire. For grease filter exchange in and around Knowle, please call us on 0345 646 2711 or use the quote form for a fixed quote. Our area covers London and the South East, Knowle included. Across Hampshire, we cover 683 places, and Knowle is one of them. Our Portsmouth page covers sites nearby (7 miles or so).
Postcode districts we cover here for grease filter exchange: PO17. Local streets include Serotine Close, Boundary Walk and Park Approach, and we cover them all for grease filter exchange. If your site is just outside Knowle, we cover Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west). We also work in nearby towns such as Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
Local landmarks in Knowle
We work in commercial kitchens and buildings around The Miners Arms and The Henry Cort Community College, among other places. Knowle’s nearest station is Fareham station, about 2 miles south. Well-known places in the area include Portchester Castle (4.9 miles south-east) and Knowle Hospital (within half a mile north-east). For a walk, there’s Portsdown Hill and Swanwick Lakes.
How the visit works
Your trading hours come first. 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. If the van will struggle with a lane or gateway near Knowle, let us know and we’ll plan around it.
- The filters in each canopy are measured and counted.
- An exchange schedule is agreed to suit your cooking.
- The dirty set is lifted out.
- Clean filters go in and we check they sit snugly.
- The dirty filters leave with us and the next visit is booked.
Before we arrive
- Let us know when the site is closed or quiet
- Tell us where we can park and unload
- Make sure someone can let us in and lock up afterwards
Get a fixed quote
Quoting starts with a diagnosis, from your photos and details or, where that isn’t enough, a survey on site. After that, you get a fixed price for the work so you know the cost before we start.
Related advice
In-house cleaning or a specialist?
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We’ll take a look and give you a fixed quote.
Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
Honest limits
We won’t sell you work that doesn’t address the problem, so here are the limits:
- Grease deep in the extract system
- Odours from the discharge that filters will not stop
- A canopy too small for the cooking beneath it
Not sure which it is? You can give us a ring on 0345 646 2711 or send us an email and we’ll tell you honestly before booking.
What we work on in Knowle
- Mesh filters
- Wall canopies
- Island canopies
- School and hospital kitchens
- Baffle filters
- Restaurants and pubs
FAQs for Knowle
Who carries out food hygiene inspections in Knowle?
In Knowle, it’s Winchester City council that carries out food hygiene inspections. An officer may look up into the canopy, so clean filters on the day and a recent certificate on file both help.
Do you clean school canteen extracts around Knowle out of term?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 4 schools and colleges with food registrations within roughly a mile and a half of Knowle. Send us your term dates when you call 0345 646 2711, or send details by email, and we’ll fit the work in.
Do you survey before quoting?
Yes. For many sites, pictures and a few details are enough, and larger or hidden systems get a visit.
What happens to the waste?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
How often should grease filters be changed?
That depends on the cooking. Heavy cooking means more frequent changes than kitchens that cook less. We set a schedule that suits your kitchen.
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 is not law, but it’s the benchmark.
Does a filter exchange disrupt service?
A filter change is quick and can be timed around service. Cooking shouldn’t happen with the filters out so the swap is done promptly.
Is there a cleaning option for the filters we have?
Yes, that is an option. The first step is looking at the filters you have because bent or damaged ones may need replacing.
Signs you need grease filter exchange in Knowle
What a kitchen cooks affects how fast filters clog. Frying, grilling and chargrilling produce far more grease than steaming or baking so no single schedule suits every kitchen.
Look out for these warning signs:
- Weak extraction at the canopy
- Grease filters clogged with grease
- Gaps where filters have been removed
- Filters that come out of the sink still dirty
A hall kitchen that only cooks for events, whether near Church of St Francis or elsewhere in Knowle, still needs its extract cleaned, just less often.
Questions to ask before booking
- What happens if part of the system can’t be accessed
- Whether a written report and pictures are included
- Whether the whole system is included, or only the parts that are easy to reach
- Which accreditations they hold, and whether you can check them
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. Clean filters mean less fuel in the canopy. Rural sites cannot always move to another kitchen or room when something fails.
A single site or a whole portfolio, we price it on the same basis: what needs doing, how we get to it and when. You will have a fixed price before any work starts.
Why choose Duct Doctor in Knowle
- Work around your opening hours, with 24/7 emergency cover
- We diagnose before we treat
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Fixed quotes, normally within one working day
Take a look at our cost guide and how to check a contractor.