Portsmouth · Grease filter exchange
Cosham grease filter exchange
Grease filter exchange for businesses, landlords and public buildings in Cosham. CHAS, SafeContractor and ISO 9001, and fully insured.
- A canopy running with filters missing
- Filters that leave gaps in the canopy
- Grease building up behind the canopy filters
About our grease filter exchange in Cosham
In Cosham, our filter exchange runs on a schedule set by how much the kitchen cooks. Busy kitchens need changes more often while a lighter kitchen can go longer. We agree the interval with you at the start. Typical jobs include missing filters in the filter bank and blocked baffle filters, on island canopies, school and hospital kitchens and restaurants and pubs.
In a smaller place like Cosham, many kitchens sit in older buildings or later extensions, with the duct running through a roof space or up an outside wall. Flat runs collect grease and need proper access to clean.
The sign-off is always in writing: a written report, dated and illustrated with pictures, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. It shows what was done and what, if anything, couldn’t be reached.
- Location
- Cosham (PO6, PO3, PO2)
- Wider area
- Portsmouth
- Records
- Photo report after every visit
- Quote
- Fixed quote, usually within a working day
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
What your team can do, and what needs us
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. What they can’t safely do is clean inside the ductwork, the fan or the risers, and that is where we come in.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, they should report it rather than try to fix it. We can diagnose it and quote.
FAQs for Cosham
Is grease filter exchange any different in a coastal place like Cosham?
It can. Cosham is within about 1 mile of the coast, and salt air speeds up corrosion. A fan housing that’s rusting near the coast can fail sooner, so it’s worth catching early.
Can you clean school kitchen extracts in Cosham during the holidays?
Yes, out-of-term visits are normal for schools. There are about 18 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Cosham. Booking early in the term gives the best choice of holiday dates.
Can you look after several sites?
Yes. Send the list of sites and the work at each and we’ll quote them together.
Which grease filters does the service cover?
We work with both baffle and mesh filters. The first step is recording what you have and set up the service around them.
Which records should we keep?
Everything that shows the system is looked after: reports, certificates, pictures and your own cleaning or check logs. A single log for each site works best.
Are you insured?
Yes. We are fully insured, and we can share the details when you need them.
Can you come out in an emergency?
Yes, day and night, every day of the year. Office hours are Monday to Friday, 8am to 6pm, and the emergency line covers the rest.
Will you tell us when the next visit is due?
Yes. How often depends on use and condition, and we explain the reasoning on the report.
Kitchen extracts in Cosham
At about 1 mile from the coast, Cosham is close enough for sea air to matter. Salt in the air is hard on rooftop fans, discharge cowls and fixings, so we check them for corrosion as well as grease. According to Food Standards Agency records, there are about 18 pubs, bars and clubs and about 6 hotels and guest houses across Cosham and its immediate surroundings (about a mile and a half). Breakfasts, bar meals and functions all put grease into the extract wherever they’re cooked. Kitchens in Cosham get their food hygiene inspections from Portsmouth council. The cleanliness of the kitchen and its equipment, extraction included, is part of what they check. A dated certificate in the maintenance file answers the question before it’s asked.
For kitchens close to Cosham station, where the day often starts early and ends late, the extract can be cleaned overnight. Bursars and site managers at schools such as Court Lane Junior Academy tend to book extract cleaning for when the kitchen is empty.
Cosham is about 2 miles south-west of Purbrook, in Portsmouth. We carry out grease filter exchange for commercial premises of every kind in Cosham and the rest of Portsmouth. Our Portsmouth coverage runs to 19 places, Cosham among them.
We cover every part of the PO6, PO3 and PO2 postcode area for grease filter exchange and the streets around it. That includes premises on Dean Road, Park Lane and Elgin Road and the roads around them. With the A397 close by, Cosham is simple for us to get to at any hour. We also cover Wymering (1 mile north-west), Hilsea (1 mile south), Drayton (1 mile east), Widley (1 mile north-east) and Paulsgrove (1 mile west). Larger places within reach include Southsea (4 miles south), Milton (3 miles south), Landport (3 miles south), Portsea (3 miles south-west), Portsmouth Point (4 miles south-west) and Fratton (3 miles south).
What’s near Cosham
Around Cosham, our work takes us to kitchens and buildings near The First Post pub, Alexandra Park and Springfield School and the streets around them. There’s a railway station in Cosham itself: Cosham station. Other landmarks nearby include Tricorn Centre (2.9 miles south) and World War I Remembrance Centre (1 mile south-east). The countryside around Cosham includes Southmoor Nature Reserve and Portsdown Hill.
Between visits
Once we’ve finished, these simple steps help:
- Always run the extract while cooking
- Clear anything stored on or near the canopy
- Never leave gaps in the filter bank
- Mention it if the kitchen gets busier
Nothing changes for your staff, except one less greasy job. Just keep the canopy clear for the next visit and let us know of any changes to opening hours.
If cooking has stepped up, the filter schedule should too. Adjusting the schedule now prevents a build-up behind the canopy.
How the job changes from site to site
Baffle filters
A clogged baffle filter restricts airflow. Swapping them for a clean set restores it.
Canopy filter housings
Grease collects in the channels and drip trays below the filters. We point it out if it needs cleaning.
Nearby places to Cosham
Also in Cosham
Do you need grease filter exchange in Cosham?
The type of cooking matters. Frying, grilling and chargrilling produce far more grease than steaming or baking so no single schedule suits every kitchen.
These are the problems we see most often:
- Gaps where filters have been removed
- Grease dripping from the canopy
- Blocked baffle filters
- Filters left unwashed on busy weeks
Healthcare kitchens cannot easily close, so their extracts are cleaned overnight or between meal services; the nearest hospital to Cosham is Queen Alexandra Hospital, about 0.6 miles north.
Comparing quotes
- Whether the figure could change on the day
- What records you will receive afterwards
- How they set the interval to the next visit
- How VAT is shown on the quote
What happens if it’s left?
Clogged filters choke the extract. The kitchen gets hotter and smokier while the fan strains. Keeping filters clean keeps the extract working properly. A planned visit to Cosham fits your hours; an emergency does not.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, and a neglected system can mean more work. If you are not sure what’s needed, ring 0345 646 2711 or send us an email for straight advice and a fixed quote.
Why choose Duct Doctor in Cosham
- Accredited under CHAS and SafeContractor, with ISO 9001
- Photo reports with every job
- Full insurance on every job
- Fixed quotes from a survey or photos
The process
Protection comes first: sheeting goes over floors and surfaces close to the work. After that, the system is made safe and the work begins. It takes well under an hour for most canopies, and we clear up before we go. Tell us when your site near Cosham is quiet and the visit will be booked for then.
- We record the number, size and type of your filters.
- An exchange schedule is agreed to suit your cooking.
- On each visit, we remove the greasy filters.
- A clean set is fitted and checked for gaps.
- We take the greasy set away and confirm the next date.
Getting ready for the visit
- Tell us where we can park and unload
- Tell us the best time to work, such as after service or at a weekend
- Mention any sign-in, permit or induction we need
How to get a quote
Some systems can be priced from pictures; others need a survey. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before work begins.
Related advice
Landlords, agents and facilities managers
Managing agents often deal with us directly. Send the address, what’s needed and how access works and we’ll come back with a fixed quote.
Facilities teams in offices, schools and healthcare sites book us too in Cosham and across Portsmouth. Larger estates can be phased building by building around the people who use them.