Greater London · Air handling unit cleaning
Air handling unit cleaning in Clapham Park, Greater London
Professional AHU cleaning in and around Clapham Park, timed so the site keeps working and signed off in writing with pictures.
- Units needing a clean before a new tenant or handover
- Fan sections that haven’t been cleaned in years
- Air handling units with blocked filters
AHU cleaning in Clapham Park
Drain trays under cooling coils are meant to empty. If the outlet blocks, standing water and slime build up, right in the path of the air going into the building. Clearing and cleaning the tray is central to every AHU clean. Typical jobs include debris and leaves in the fresh air intake and dirty coils holding back the airflow, on drain trays, filter sections and internal panels.
London buildings often depend on air handling units in plant rooms or on the roof to supply fresh air. In a building in Clapham Park, dust and debris build up in the units and ductwork over time, which is what TR19® Air cleaning deals with.
Accreditations are easy to claim and worth checking. We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Where
- Clapham Park (SW4, SW2, SW12)
- Wider area
- Greater London
- Paperwork
- Photo report after every visit
- Price
- A fixed price before work begins
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
When to call us in Clapham Park
Filters that aren’t changed or cleaned on time clog up, cutting airflow and sometimes letting dirty air bypass them altogether. Then the rest of the unit takes the load.
Most sites get in touch when they notice something like this:
- Dust built up on fan impellers
- Stale or musty smells from the ventilation
- Air handling units with blocked filters
- Plant that needs cleaning after a refit
Classrooms and halls at schools such as Glenbrook Primary School are easiest to work in when pupils are away.
What to look for in a quote
- If they look at the system before pricing
- Whether a written report and pictures are included
- How areas they can’t reach will be recorded
- Which accreditations they hold, and whether you can check them
Questions from Clapham Park
Can you come to Clapham Park after we close?
Yes, we can come after you close and finish before you open. It means the site in Clapham Park keeps running as normal. Just call us on 0345 646 2711, or email photos with your opening times and we’ll plan around them.
Do you clean school ventilation in Clapham Park in the holidays?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 56 schools, colleges and universities with registered kitchens within about a mile and a half of Clapham Park. You can call 0345 646 2711, or email photos with the dates the site is empty.
How long does it take to clean an air handling unit?
Cleaning takes half a day to a full day per unit, with large plant planned over several shifts. Bigger units can be phased, so call 0345 646 2711 or drop us a line to talk it through.
What do you clean inside the unit?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. Filters are cleaned or changed as agreed in the quote.
Is there a report after cleaning?
Yes. Every clean comes with a TR19® certificate and a photo report. They’re worth keeping with the plant records.
Are you insured?
Yes, fully. We also hold CHAS and SafeContractor, for sites that check contractor safety.
What’s TR19?
TR19® is the BESA specification for keeping ventilation systems clean. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.
Is Clapham Park in your area?
Yes. We work in Clapham Park and across Greater London, as part of our work across South East England and London. For a fixed quote, call us on 0345 646 2711, or email photos.
What we do, step by step
On the day, we arrive at the time agreed with you, often in the evening, overnight or at the weekend so the site keeps working. Anything that needs to be off for the work is switched off and left to cool before work begins, and the area around the work is covered and protected. On site, it takes a single shift for a typical unit, longer for large or heavily soiled ones. Loading bays, visitor permits and roof access are the first things we ask about for a site in Clapham Park.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
Getting ready for the visit
- Let us know about parking and loading
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Find the previous report, if there is one
Getting a quote
If you need AHU cleaning in Clapham Park, give us a ring on 0345 646 2711 or drop us a line. Let us know the site type and the opening hours, and send photos or your last report if you can. A fixed quote typically follows within one working day.
Advice
When something else is needed
We’d rather tell you now than book work that won’t help, so here are the limits:
- Mechanical faults with motors, belts or bearings
- Coils that are corroded or leaking and need replacing
- The supply and extract ducts, quoted separately
Not sure which it is? You can call 0345 646 2711, or email photos and we will tell you honestly.
Where we work
- Supply and extract fans
- Internal panels
- Filter sections
- Drain trays
- Heating and cooling coils
- Dampers and louvres
In-house cleaning or a specialist?
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
Your own staff can handle the daily basics: wiping canopies, washing grease filters and recording it in a log. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that’s where we come in.
Different parts, different methods
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.
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. A clean fan runs more smoothly.
Places near Clapham Park
Also in Clapham Park
Why it’s worth doing now in Clapham Park
A clean unit feeds cleaner air into the ductwork, so the whole system stays cleaner for longer. That makes the next inspection of a building in Clapham Park simpler. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
Putting the work off seldom saves money. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you’re not sure what’s needed, give us a ring on 0345 646 2711 or drop us a line and we will give you an honest view and a fixed quote.
Why Clapham Park businesses choose us
- Fixed quotes, typically within one working day
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- One number for every site across the South East and London
- A written report with photos after every visit
See our cost guide and our accreditations.
AHU cleaning in Clapham Park: local notes
Food Standards Agency data includes about 56 schools, colleges and universities, about 75 care, childcare and hospital premises and about 9 hotels, B&Bs and guest houses across Clapham Park and its immediate surroundings (about a mile and a half). Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Ventilation cleaning in London buildings is normally planned for evenings or weekends. St James' Hospital is the nearest hospital, about 1.4 miles south-west of Clapham Park. 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 Clapham High Street station, their ventilation can be inspected and cleaned out of hours. Healthcare ventilation, from large hospitals like St James' Hospital (about 1.4 miles south-west) to small clinics, depends on clean filters, coils and ducts.
Clapham Park is about 1 mile south-west of Stockwell, in Greater London. Across the SW4 area, we cover AHU cleaning for commercial sites. Clapham Park is one of 764 towns, villages and districts in Greater London we cover for commercial clients.
Our technicians cover all of SW4, SW2 and SW12 for AHU cleaning and the streets around it. Whether your site is on Lynn Road, West Road and Elms Road or a nearby road, we can help. Neighbouring places we cover for AHU cleaning include Grange Mills (1 mile south-west), Hyde farm estate (1 mile south), Brixton (1 mile east), Clapham (1 mile north) and Balham (1 mile south-west). Larger places within reach include London (4 miles north-east), City of Westminster (4 miles north), Marylebone (4 miles north), Kensington (4 miles north-west), St Pancras (5 miles north) and Shoreditch (6 miles north-east).
Near you in Clapham Park
Typical jobs here are in premises near Harris Academy Clapham, The Family School and Ye Olde Windmill Public House, among other places. The closest station to Clapham Park is Clapham High Street station, about 0.8 miles north. Other landmarks nearby include St James' Hospital (1.4 miles south-west) and Soseki Museum (0.9 miles north-west). Open spaces near Clapham Park include Battersea Park Lake and Centre for Wildlife Gardening.
Looking after it afterwards
Here’s the after-treatment advice, in brief:
- Report musty smells from the vents right away
- Do not store bins or materials near the intake
- Store the TR19 paperwork where auditors can find it
- Look at the condensate drain whenever the unit is serviced
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can survey both.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.