Greater London · Air handling unit cleaning
Air handling unit cleaning in Walworth, Greater London
AHU cleaning for commercial sites in Walworth and across Greater London. CHAS, SafeContractor and ISO 9001, and fully insured.
- Rooms that smell stuffy when the system runs
- Intake sections clogged with outdoor debris
- Air handling units due a clean after building work
AHU cleaning in Walworth, done properly
A cooling coil drips condensate into a tray that should drain away. If the outlet blocks, standing water and slime build up, right in the path of the air going into the building. Cleaning and clearing it is a key part of the job. Common call-outs are for air handling units due a clean after building work and debris and leaves in the fresh air intake, across supply and extract fans, dampers and louvres and heating and cooling coils.
Many London buildings have had their ventilation extended and altered through several fit-outs, with old runs left behind that are hard to reach. In Walworth, as elsewhere, cleaning starts with an inspection of what’s there.
Insurers, fire officers and environmental health officers all look at records. So every job comes with a written report and photos, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Place
- Walworth (SE1P, SE17, SE1)
- Wider area
- Greater London
- Records
- Written report with pictures
- Quotes
- A fixed quote up front
- Working hours
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
In-house cleaning or a specialist?
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they can’t safely do is clean inside the ductwork, the fan or the risers, which is where we come in.
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We’ll take a look and send you a fixed quote.
How it works
The first job on site is protection: sheeting goes over floors and surfaces close to the work. After that, the system is made safe and the work begins. It takes half a day to a full day per unit, with large plant planned over several shifts, and we clear up before we go. Expect the work in Walworth to happen after your last customer leaves, not during trading.
- We start with a survey of the unit and a fixed quote for the work.
- We arrange the shutdown with your staff and sheet the area.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- We clean out the drain tray and make sure it drains.
- We close up the unit and send the certificate and before and after pictures.
How to prepare
- Name a contact who can let us in at the agreed time
- Tell us where we can park and unload
- Dig out any earlier paperwork for the system
How to get a quote
For a fixed quote, ring 0345 646 2711 or drop us a line and tell us the type of site, your opening hours and roughly what the system looks like. A few pictures and your last certificate or report help a lot. You will usually have a quote within one working day.
Advice
How we price AHU cleaning
A fixed price needs a few facts first. We look at:
- Any permits to work or inductions
- A single visit or a regular plan
- Parking and loading at the site
- The times the site is available
The cost depends on how big the system is, the condition it’s in and access to every part of it. You get a fixed price before any work starts, so there are no surprises.
What to send for a quote
There’s no need for technical detail. It helps if you can send:
- Photos showing the whole system and its surroundings
- Problems your staff have spotted
- Any previous report or certificate
- The postcode and the type of business
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 work begins.
What a clean won’t put right
Not every problem is solved by AHU cleaning, and we’ll tell you before any work starts. It doesn’t solve:
- Dirty ducts beyond the unit itself
- A system that’s undersized for the building
- Leaking heating or cooling coils
If in doubt, give us a ring on 0345 646 2711 or email us and we’ll say what we think.
Where we work
- Heating and cooling coils
- Internal panels
- Dampers and louvres
- Filter sections
- Supply and extract fans
- Drain trays
How the job changes from site to site
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. The coil and its drain tray are cleaned as one job.
Drain trays
A tray that does not drain becomes a pool of stagnant water in the airstream. We clean it and note if the slope or the drain needs attention.
Why deal with it now?
Dirt left in an air handling unit doesn’t stay in the unit. It moves on into the ductwork and out into the rooms, which is why the unit and the ducts are best cleaned together. Leaving it on a busy London site only adds to the work.
When the work has to happen, how we reach it and how big the site is all affect the cost. We take each of them into account and give you a fixed price before any work starts.
What you get with us
- Accredited under CHAS and SafeContractor, with ISO 9001
- A fixed price before any work starts
- Survey first, then a fixed quote
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
Read what affects the cost and our accreditations.
AHU cleaning in Walworth: local notes
Going by the FSA’s register, there are about 118 schools, colleges and universities, about 63 care, childcare and hospital premises and about 49 hotels, B&Bs and guest houses serving food within about 1.5 miles of central Walworth. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first. For Walworth, the closest hospital is The Walworth Clinic, roughly under half a mile west. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Hospitals such as The Walworth Clinic (about less than half a mile west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Walworth are no different. If you manage a school such as Robert Browning Primary School, ventilation cleaning is best booked for the holidays. If you run an office near Elephant & Castle station, its supply ductwork can gather dust for years before anyone looks inside.
Walworth is about 1 mile south of London, in Greater London. For AHU cleaning in and around Walworth, please call us on 0345 646 2711 or use the quote form for a fixed quote. We work across South East England and London, including Walworth. We cover 764 places across Greater London, large and small.
Every address in SE1P, SE17 and SE1 is within our area for AHU cleaning, from the main roads to the quietest streets. Whether your site is on Mina Road, Ash Avenue and Angel Lane or a nearby road, our technicians can take on the work. We also cover the places around Walworth: London (1 mile north), Bermondsey (1 mile north-east), Camberwell (1 mile south), South Bermondsey (1 mile east) and Denmark Hill (2 miles south). We also work in nearby towns such as City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (5 miles west), St Pancras (3 miles north-west), Shoreditch (3 miles north) and Walthamstow (7 miles north-east).
Near you in Walworth
Around Walworth, our work takes us to kitchens and buildings near University Academy of Engineering South Bank, Nursery Row Park and Lord Nelson pub. You’ll also find Lambeth Palace Library (1.3 miles north-west) and St Saviour's and St Olave's Church of England School (under half a mile north). For rail, the closest station is Elephant & Castle station, about 0.5 miles north-west of the centre. Nearby you’ll also find Gabriel's Wharf (1.5 miles north-west) and The Walworth Clinic (under half a mile west). Green spaces nearby include Bellenden Road Nature Garden and St. James's Park Lake.
Also near Walworth
What else we do in Walworth
Common questions in Walworth
Do you do school ventilation cleaning in Walworth in the summer holidays?
Yes, and it’s the easiest time to do it. Food Standards Agency records list about 118 schools, colleges and universities with registered kitchens within about a mile and a half of Walworth. Just phone us on 0345 646 2711, or send details by email with your term dates and we’ll plan around them.
Is parking a problem for work in Walworth?
We plan it in advance, so let us know about loading bays, permits and access rules at the building. Working overnight, as we often do in London, normally makes it simpler.
How do you keep the site clean during the work?
We start with protection: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
What does AHU cleaning cost?
Every site is different, so each gets its own fixed quote. To get one, give us a ring on 0345 646 2711 or drop us a line and tell us about the site and its opening hours.
Can we book visits on a schedule?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. The report from each visit recommends the next date.
What is 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 the AHU have to be shut down for cleaning?
Yes, for the time we’re working on it. We can work evenings, overnight or at weekends so the building isn’t left without ventilation when it’s busy.
Do you offer emergency callouts?
Yes, any time. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we’ll advise on what to do next.
Managing agents and facilities teams in Walworth
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
Records are where multi-site compliance often slips. Every visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.