Greater London · Air handling unit cleaning
Stockwell AHU cleaning
Professional AHU cleaning in and around Stockwell, timed so the site keeps working and signed off in writing with pictures.
- Units needing a clean before a new tenant or handover
- Dirty coils holding back the airflow
- Blocked condensate drains and slimy trays
Why it’s worth doing now in Stockwell
When the unit is clean, less dirt reaches the ducts, so the ducts and grilles stay cleaner between cleans. It also means the next inspection has less to find. It’s better booked as a planned job in Stockwell than handled as an emergency.
Working hours, access and the scale of the site can all change the price. Each of those is built into the quote and give you a fixed price before we start.
Why us?
- Ventilation hygiene specialists since 2009
- Photo reports with every job
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- One number for every site across the South East and London
See how cleaning jobs are priced and our accreditations and certificates.
How we handle AHU cleaning in Stockwell
All the building’s air passes through the fan, so dust on its blades and housing ends up in the airstream. We clean the fan section along with the rest of the unit, with the unit switched off and made safe first. The work covers heating and cooling coils, internal panels and drain trays, and the jobs we see most are dirty fans and fan housings and dust-coated heating and cooling coils.
Across London, offices, hotels, schools and healthcare buildings rely on mechanical ventilation, much of it supplied through air handling units on roofs or in basements. In a building in Stockwell, dust and debris build up in the units and ductwork over time, which is what TR19® Air cleaning deals with.
The sign-off is always in writing: a written report, dated and illustrated with pictures, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. It shows what was done and what, if anything, couldn’t be reached.
- Where
- Stockwell (SW9, SW4, SW8)
- Wider area
- Greater London
- Records
- Written report with pictures
- Quote
- A fixed quote up front
- Working hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
How the visit works
There’s very little for your team to do on the day. Someone lets us in at the agreed time and shows us where everything is, and the rest is down to us. Before we leave, the area is tidied and the paperwork follows. Many London buildings have a managing agent, a security desk or a permit-to-work system, so tell us who to contact in Stockwell.
- First we agree when the unit can be switched off, including evenings or weekends.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- After pictures are taken and the certificate issued.
Before we arrive
- Let us know about permits to work or site inductions
- Find the previous report, if there is one
- Tell us where we can park and unload
Ask for a quote
Getting a quote does not take long. Call or email with a few details and you will usually have a fixed price within one working day. If we need to see the system first, we book a survey around your hours.
Read more
How we price AHU cleaning
Sites vary more than people expect. The main factors:
- Access, including roofs, risers and ceiling voids
- What state the system is in
- Whether several sites go on one quote
- Where the site is and how we reach it
Whatever the type of site, the quote works the same way: the size of the job, access, condition and working hours. Call for a fixed quote and we’ll go through it with you.
What to send for a quote
What to send for a quote:
- The paperwork from the last visit, if you have it
- The times we could work without disrupting the site
- The site address and the type of premises
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
Some systems can be priced from photos; others need a survey. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
Between visits
After the visit, a few habits help the work last:
- Keep inspection doors on the unit in good order
- Report water on the plant room floor
- Keep the certificate and photo report with the plant records
- Make sure condensate is draining away
The report shows each section of the unit before and after, and note any part we couldn’t get to. It also notes faults we spotted, such as damaged panels or a blocked drain.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
What we are called out for in Stockwell
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray does not fall properly, water stands in it, and that is where slime and odours start.
These are the problems we see most often:
- Units needing a clean before a new tenant or handover
- Coils clogged with dust and debris
- Blocked condensate drains and slimy trays
- Plant that has been serviced but not cleaned
Healthcare buildings such as St Giles' Hospital, about 1.7 miles east, depend on their ventilation; if you manage a surgery, clinic or care home near Stockwell, yours matters too.
What to look for in a quote
- What happens if part of the system can’t be accessed
- Whether the price is fixed
- Exactly which parts of the system are covered
- Whether a written report and photos are included
AHU cleaning in Stockwell: local notes
There are about 70 schools, colleges and universities, about 56 care, childcare and hospital premises and about 10 hotels, B&Bs and guest houses on the FSA’s food hygiene register within about 1.5 miles of central Stockwell. Busy, occupied buildings like these are where clean supply air matters most. In London, ventilation plant is often on the roof or below ground, so the work is normally done out of hours. About 1.7 miles east of Stockwell is St Giles' Hospital, the nearest hospital. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
If you manage offices or shops near Brixton station, their ventilation can be inspected and cleaned out of hours. If you manage a school such as St Andrew's Church of England Primary School, ventilation cleaning is best booked for the holidays.
Stockwell is about 2 miles south-west of London, in Greater London. We provide AHU cleaning for businesses, landlords and public buildings in Stockwell and the rest of Greater London. Our Greater London coverage runs to 764 places, Stockwell among them.
Work in SW9, SW4 and SW8 is surveyed, quoted and booked the same way as anywhere else. Whether your site is on Kay Road, West Road and Cato Road or a nearby road, our technicians can take on the work. Being close to the A203 and A2217, Stockwell is simple for us to get to for AHU cleaning. Nearby, we also carry out AHU cleaning in Little Portugal (1 mile north), Angell Town (1 mile east), North Brixton (1 mile north-east), South Lambeth (1 mile north) and Clapham (1 mile west). Further out, we also cover City of Westminster (3 miles north-west), Marylebone (4 miles north), Kensington (4 miles north-west), St Pancras (4 miles north), Shoreditch (4 miles north-east) and Walthamstow (9 miles north-east).
Local landmarks in Stockwell
Around Stockwell, our work takes us to kitchens and buildings near Max Roach Park, Lansdowne School and The Marquess Of Lorne Public House. The closest station to Stockwell is Brixton station, about 0.5 miles south-east. A little further out are Gabriel's Wharf (2.8 miles north) and Baynard's Castle (3.1 miles north). Open spaces near Stockwell include Knight's Hill and Centre for Wildlife Gardening.
Stockwell: your questions answered
Do you work at weekends in Stockwell?
Yes, out-of-hours work is a big part of what we do. That way a site in Stockwell doesn’t have to lose a day’s trading. Just ring 0345 646 2711 or send us an email with your opening times and we’ll plan around them.
Can ventilation in schools around Stockwell be cleaned out of term?
Yes, out-of-term visits are normal for schools. Food Standards Agency records list about 70 schools, colleges and universities with registered kitchens within about a mile and a half of Stockwell. You can call 0345 646 2711, or send details by email with the dates the site is empty.
Is a quote from pictures possible?
Often, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Where we can’t see enough, we arrange a survey.
How far ahead should we book?
Earlier is better, especially for out-of-hours work. Quotes typically come back within one working day, and there’s a 24/7 line for emergencies.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line for anything that can’t wait until a planned visit. Ring any time and tell us what’s happened.
How much does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: how big it is, what state it’s in, how we reach it and the working hours. We fix the price before work begins.
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 isn’t law, but it’s the benchmark.
How often should an air handling unit be cleaned?
There’s no single answer; it comes down to the building and the unit. Regular inspection shows when it’s due, and the report recommends a next date.
Managing agents and facilities teams in Stockwell
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.
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We can quote either party and send the paperwork to whoever needs it.
Also near Stockwell
More services for Stockwell
In-house cleaning or a specialist?
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. That is our job.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.