Greater London · Grease filter exchange
Coldblow grease filter exchange
Specialist grease filter exchange for Coldblow: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.
- Drips falling from the filters onto equipment
- Grease left in baffles after washing
- Poor airflow through the filters
In-house cleaning or a specialist?
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
Logging matters as much as cleaning. A simple log of filter washes, wipe-downs and checks shows an inspector that the system is looked after between visits, alongside our reports.
About our grease filter exchange in Coldblow
Across Coldblow, our filter exchange suits restaurants, pubs, cafés, schools, care homes and other kitchens, from a single canopy to several. We can come before or after service so nobody has to stop cooking. If you have grease dripping from the canopy and staff short of time to wash filters, we can help.
Across London, many commercial kitchens are squeezed into basements and narrow back-of-house spaces, with extract ducts that can climb several floors to discharge at roof level. In Coldblow, as elsewhere in the capital, a long duct run means more access points to open and more grease to remove.
The paperwork matters as much as the work. You get a written report with pictures after every visit, 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.
- Location
- Coldblow (DA5)
- Region
- Greater London
- Records
- Report and pictures after the visit
- Price
- A fixed price before any work starts
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
Signs you need grease filter exchange in Coldblow
Every fry, grill and sauté sends grease-laden vapour upwards. The filters catch much of it so they gradually clog until the air can barely get through.
Look out for these warning signs:
- Poor airflow through the filters
- Missing filters in the filter bank
- Filter washing that keeps being missed
- Damaged filters letting grease past
Term dates shape school work: for a school like Maypole Primary School, an extract clean fits neatly into a half-term or summer break.
Questions to ask before booking
- Whether VAT is included
- Whether a survey comes first
- Exactly which parts of the system are covered
- Proof of insurance
When it’s something else
In fairness, some problems need a different fix:
- A heavily greased plenum or canopy, which needs cleaning to TR19
- An extract that was undersized from the start
- Grease deep in the extract system
If in doubt, phone us on 0345 646 2711 or email us and we will say what we think before booking.
Parts of the system we cover
- School and hospital kitchens
- Baffle filters
- Island canopies
- Wall canopies
- Restaurants and pubs
- Mesh filters
What we do, step by step
The visit has three parts: set-up, the treatment itself and the sign-off. Set-up means sheeting and making equipment safe, and the sign-off is a written report with photos. Most of the time goes on the work itself, and that takes less than an hour in most kitchens. Managed blocks in London often need contractors booked in ahead, and we’re happy to deal with the agent directly for a site in Coldblow.
- The filters in each canopy are measured and counted.
- We set the interval with you.
- 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.
Preparing for the visit
- Make sure equipment near the work can be switched off and left to cool
- Make sure someone can let us in and lock up afterwards
- Let us know about parking and loading
Get a fixed quote
The quickest way to a quote is to send pictures: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.
Read more
Why act early in Coldblow
Clogged filters choke the extract. The kitchen gets hotter and smokier while the fan strains. Keeping filters clean keeps the extract working properly. Choosing the date yourself beats having a fault choose it for you.
One small site or a whole estate, the quote is built the same way: the work involved, the access and the timing. The price is fixed before work begins.
Why choose Duct Doctor in Coldblow
- A single point of contact for sites across the South East and London
- Full insurance on every job
- We diagnose before we treat
- In business since 2009
Read our cost guide and how to check a contractor.
Different parts, different methods
School, care home and staff kitchens
Lighter kitchens can often go longer between changes. We agree the schedule to match.
The plenum
The plenum is the space behind the filters. It collects whatever grease the filters miss.
Aftercare tips
Results last longer with the right care. We suggest:
- Keep the canopy clear for exchange visits
- Keep filter exchange and TR19 cleaning on the same plan
- Keep the extract on whenever the range is in use
- Tell us if a filter is bent or damaged
There’s no waiting: the canopy is ready as soon as the clean set is fitted. The dirty set leaves with us for cleaning.
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.
Kitchen extracts in Coldblow
Food Standards Agency data counts about 59 cafés, restaurants and staff canteens and about 31 takeaways within roughly a mile and a half of the centre of Coldblow. Clogged filters slow the airflow, and busy kitchens like these clog them fast. In London, kitchens are typically cleaned overnight, when the kitchen is closed and loading is easier. It’s Bexley council that sends environmental health officers to food businesses in Coldblow. Extraction counts as kitchen equipment, so its condition can come up on the day. Keeping each certificate and photo report on file helps show the extract is looked after.
A hospital like Bexley Hospital, about 1.9 miles north-west, is the kind of site where a kitchen may cook for patients, staff and visitors all day. Church and community hall kitchens, near Church of St Mary the Virgin or anywhere around Coldblow, are easy to forget, but their extracts collect grease like any other.
Coldblow is about 3 miles east of Sidcup, in Greater London. Whatever kind of site you run in Coldblow, we can take on grease filter exchange. We can work out of hours so trading isn’t interrupted. Our Greater London coverage runs to 764 places, Coldblow among them. You can also see our page for London, about 12 miles away.
We cover every part of DA5 for grease filter exchange and the streets around it. Grease filter exchange is available to premises on St Mary's Road, Dartford Road and Wansunt Road and the roads around them. Close by, we work in Joyden's Wood (1 mile south-east), Bowmans (1 mile east), North Cray (1 mile south-west), Crayford (1 mile north-east) and Wilmington (1 mile south-east). Further out, we also cover London (12 miles west), City of Westminster (15 miles west), Marylebone (14 miles north-west), St Pancras (14 miles north-west), Shoreditch (12 miles north-west) and Walthamstow (13 miles north-west).
Near you in Coldblow
Locally, jobs take us to businesses close to The Old Wick pub, St Columba's Catholic Boys' School and Braeburn Park, among other places. For rail, the closest station is Bexley station, about 0.6 miles west of the centre. Other landmarks nearby include Stone Castle (5 miles east) and Bexley Museum (0.7 miles north). For a walk, there’s Wansunt Pit and Summer Hill.
Your questions about grease filter exchange in Coldblow
Can the work in Coldblow be done at night or at weekends?
Yes. We work evenings, overnight and at weekends. It means the site in Coldblow keeps running as normal. When you call us on 0345 646 2711, or email photos, mention when the site is quiet.
Which fire authority looks after Coldblow?
It’s London Fire Brigade, which covers Coldblow. A recent cleaning certificate and a note of the next clean date show that grease in the extract is being managed.
Can one contract cover all our sites?
Yes. We work across South East England and London, so we can schedule a run of sites on one programme. Every site has its own report.
Do we lose a day’s trading?
Not typically. The area we are working in has to be out of use while we are there, so we book a time when it would be closed anyway.
How far ahead should we book?
That depends on the slot you want and the size of the job. Mention your preferred dates with your enquiry, and if it’s an emergency, call us any time.
Do you clean filters as well as exchanging them?
We can. Some kitchens prefer their own filters cleaned on a schedule, and others prefer a straight swap. We make sure the canopy is ready for service either way.
Can you set up regular visits?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. Each report recommends when the next visit should be.
Do you have insurance?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.