Greater London · Air handling unit cleaning
AHU Cleaning in Dulwich
AHU cleaning across Dulwich and nearby, timed so the site keeps working and signed off in writing with pictures.
- Dust-coated heating and cooling coils
- Dirty filters cutting the airflow
- Plant that has been serviced but not cleaned
AHU cleaning for kitchens and businesses in Dulwich
No two plant rooms are the same, whether it’s a compact unit in a ceiling void or a big unit on the roof. Every job starts with a survey, from photos or on site, followed by a fixed quote, so you know where you stand. If you have plant that has been serviced but not cleaned and coils clogged with dust and debris, we can help.
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 Dulwich, dust and debris build up in the units and ductwork over time, which is what TR19® Air cleaning deals with.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we are fully insured. We are also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we’ve been trading since 2009.
- Where
- Dulwich (SE22, SE21, SE23)
- Wider area
- Greater London
- Reporting
- Report and pictures after the visit
- Price
- A fixed quote up front
- Working hours
- After hours by arrangement; emergencies any time
- Call
- 0345 646 2711
- Checked
- 30 October 2026
What happens on the day
Protection comes first: floors, worktops and anything near the work are covered. Then we make the system safe and start. It takes half a day to a full day per unit, with large plant planned over several shifts, and the area is cleaned down before we leave. If your building in Dulwich has sign-in rules, permits or key holders, mention them when you book.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Let us know when the site is closed or quiet
- Mention any locked doors, roof access or ceiling voids
- Dig out any earlier paperwork for the system
Ask for a quote
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before we start.
Read more
How we price AHU cleaning
Before we fix a price, we need to know a few things. We check:
- Access, including roofs, risers and ceiling voids
- The scale of the work
- Parking and loading at the site
- A single visit or a regular plan
The cost depends on the size of the system, what state it’s in and access to every part of it. You get a fixed price before we start, so you know where you stand.
Asking for a quote
Photos let us diagnose from a distance. The most useful are:
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- A few general shots of the system
- Your opening hours and when the area is out of use
- The paperwork from the last visit, if you have it
For AHU cleaning in Dulwich, ring 0345 646 2711 or email us. Let us know the site type and the opening hours, plus photos or the previous report if they’re to hand. We usually send a fixed quote within one working day.
Leave it or put it right?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. A TR19® certificate and photo report give you that, ready to show anyone who asks. In Dulwich, as across London, ductwork often passes through shared risers and other people’s space.
A single site or a whole portfolio, we price it on the same basis: what needs doing, how we get to it and when. The price is fixed before work begins.
Why us?
- Photo reports with every job
- Out-of-hours work and a 24/7 emergency line
- Full insurance on every job
- CHAS, SafeContractor and ISO 9001
Common problems we fix in Dulwich
Filters catch most of the dust, but not all of it. What gets through settles on coils, fans and the inside of the casing, building up layer by layer.
If you notice any of these, it’s worth a diagnosis:
- Leaves and litter drawn into the unit
- Units needing a clean before a new tenant or handover
- Filters that are clogged or overdue
- Dust built up on fan impellers
For workplaces around West Dulwich station with mechanical ventilation, cleaning can be done in the evening or at weekends.
Before you book anyone
- Whether the quote shows VAT
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Exactly which parts of the system are covered
- Whether a survey comes first
When something else is needed
Before booking, it helps to know what’s not included:
- Ventilation that was badly designed in the first place
- Dirty ducts beyond the unit itself
- Coils that are corroded or leaking and need replacing
If you are not sure, just call us on 0345 646 2711 or send us an email and we will give you a straight answer before you book.
Parts of the system we cover
- Internal panels
- Drain trays
- Supply and extract fans
- Filter sections
- Heating and cooling coils
- Dampers and louvres
How the job changes from site to site
Heating and cooling coils
Cooling coils stay damp in use, so dirt on them can turn sticky. We clean the coil and the tray beneath it together.
Internal casing and panels
Loose or damaged linings inside a unit can break up into the airstream. We note any we find in the report.
Dulwich: your questions answered
Do you work at weekends in Dulwich?
Yes, out-of-hours work is a big part of what we do. It means the site in Dulwich keeps running as normal. When you call 0345 646 2711 or drop us a line, mention when the site is quiet.
Can you clean school ventilation in Dulwich during the holidays?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 55 schools and colleges with food registrations within roughly a mile and a half of Dulwich. Tell us your holiday dates and we’ll book the visit for when the site is empty.
How much does AHU cleaning cost?
The cost depends on the size of the system, its condition, access and timing. Call for a fixed quote, typically ready within one working day.
Do you have insurance?
Yes. We are fully insured, and we can share the details when you need them.
Do you repair air handling units?
Our AHU work is cleaning rather than mechanical repair. If we spot a fault, we note it in the report for your maintenance team to follow up.
How do you keep the site clean during the work?
By covering it before any work starts. The work is kept contained and clean down when we finish.
Will the ventilation be off while you clean?
Yes. The unit has to be shut down and isolated before it’s opened. The shutdown is planned with whoever runs the building.
How often do AHUs need cleaning?
TR19® Air takes a risk-based approach, so it depends on inspection rather than a fixed interval. We recommend a next date in each report.
Places near Dulwich
Also in Dulwich
Ventilation in Dulwich buildings
There are about 55 schools, colleges and universities, about 64 care, childcare and hospital premises and about 3 hotels and B&Bs on the FSA’s food hygiene register in and around Dulwich, up to about a mile and a half out. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. In London, ventilation plant is often on the roof or below ground, so the work is typically done out of hours. Dulwich’s nearest hospital, Dulwich Community Hospital, is about 0.9 miles north. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Classrooms and halls at schools such as St Anthony's Catholic Primary School are easiest to work in when pupils are away. Healthcare ventilation, from large hospitals like Dulwich Community Hospital (about 0.9 miles north) to small clinics, depends on clean filters, coils and ducts.
Dulwich is about 1 mile south-east of Herne Hill, in Greater London. Dulwich gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with photos. Our Greater London coverage runs to 764 places, and Dulwich is one of them.
We work across SE22, SE21 and SE23 for AHU cleaning and the streets around it. That includes premises on Court Lane, Druce Road and Boxall Road and the roads around them. Dulwich is on the A2216, which makes it straightforward for our technicians to reach for AHU cleaning. Close by, we work in Dulwich Village (1 mile north-west), West Dulwich (1 mile south), Herne Hill (1 mile north-west), Sydenham Hill (1 mile south-east) and Forest Hill (1 mile east). Larger places within reach include London (4 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north) and Shoreditch (6 miles north).
Around Dulwich
Typical jobs here are in premises near The Crown and Greyhound pub, Dulwich Park and Alleyn's School and the streets around them. The nearest railway station is West Dulwich station, roughly 0.7 miles south-west. A little further out are Dulwich Community Hospital (0.9 miles north) and Greenwich Castle (4 miles north-east). Green spaces nearby include Knight's Hill and Centre for Wildlife Gardening.
What staff can safely do
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks helps show that the system is managed between specialist visits, next to our reports.
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.