Greater London · Air handling unit cleaning
Air handling unit cleaning in Orpington, Greater London
We cover Orpington for cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Out-of-hours visits, a fixed quote and a written report with photos as standard.
- Units needing a clean before a new tenant or handover
- Plant that has been serviced but not cleaned
- Drain trays holding standing water
How we handle AHU cleaning in Orpington
We clean the parts of the unit where dirt and moisture gather: the filter section, heating and cooling coils, drain trays, fan and casing. You get a TR19® certificate and a photo report showing the unit before and after. If you are dealing with units that have only ever had filter changes and coils clogged with dust and debris, we can put it right.
In London, plant rooms are often in basements or on roofs reached through occupied floors, so work in Orpington is often done in the evening or at weekends. Loading and parking are planned with the building first.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we are fully insured. On top of that, we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we have been trading since 2009.
- Location
- Orpington (BR5, BR6, BR7, DA14)
- Region
- Greater London
- Reporting
- Written report with pictures
- Quotes
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
Looking after it afterwards
After the visit, a few habits help the work last:
- Plan the next inspection before the last report gets filed away
- Keep inspection doors on the unit in good order
- File each AHU report in the maintenance log
- Flag stale or damp smells in the supply air
Stick to the filter change schedule, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Keep the area around the intake clear. What’s near the intake ends up in the unit.
Signs you need AHU cleaning in Orpington
Cooling coils create condensation, and that water has to go somewhere. A blocked outlet or a badly sloped tray leaves standing water, and slime and smells soon follow.
What we are most often called out for:
- Odours coming through the supply air
- Drain trays holding standing water
- Dirty filters cutting the airflow
- Leaves and litter drawn into the unit
Hospitals such as Orpington Hospital (about 1.5 miles south) show how much a building can rely on clean ventilation, and smaller healthcare sites near Orpington are no different.
What to look for in a quote
- What hours they’ll be on site
- Whether the quote shows VAT
- Whether inaccessible sections are listed on the report
- Whether a written report and photos are included
What happens on the day
Everything the job needs comes with us, including protection sheets, the right tools and access kit. All we need from you is clear access and the right equipment switched off. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. Security desks and permits-to-work are routine in London, so let us know what your building in Orpington needs from us.
- First we agree when the unit can be switched off, including evenings or weekends.
- 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.
- We take after photos and issue the certificate and report.
How to prepare
- Make sure someone can let us in and lock up afterwards
- Tell us the best time to work, such as after service or at a weekend
- Tell us where we can park and unload
How to get a quote
We don’t publish a price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, then send a fixed quote. To get going, call 0345 646 2711 or drop us a line.
Related advice
AHU cleaning around Orpington
There are about 3 schools, colleges and universities and about 14 hospitals, care homes and childcare premises on the FSA’s food hygiene register in Orpington and the streets around it, up to about 1.5 miles out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. For Orpington, the closest hospital is Orpington Hospital, roughly 1.5 miles south. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital. In London, ventilation plant is often on the roof or below ground, so the work is normally done out of hours.
If you manage offices or shops near St Mary Cray station, their ventilation can be inspected and cleaned out of hours. School buildings such as Perry Hall Primary School are typically done in the holidays, so classrooms are not disturbed.
Orpington is about 12 miles south-east of London, in Greater London. Every kind of commercial site in Orpington, we can take on AHU cleaning. We can work out of hours so the site keeps running. Orpington is one of 764 towns, villages and districts in Greater London where we work for AHU cleaning. We also work in London, around 12 miles away.
Here we cover the BR5, BR6, BR7 and DA14 postcode area for AHU cleaning. You will find streets such as High Street, Furzehill Square and Station Road, and we cover them all for AHU cleaning. Being close to the A224 and B258, Orpington is simple for us to get to at any hour. If your site is just outside Orpington, we cover Poverest (1 mile north), Derry Downs (1 mile east), St Mary Cray (1 mile north), St Paul's Cray (1 mile north) and Goddington (1 mile south). Further out, we also cover London (12 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (13 miles north-west).
Near you in Orpington
In Orpington, that means kitchens and buildings near The Priory School, Jubilee Country Park and Harris Academy Orpington and the streets around them. Orpington’s nearest station is St Mary Cray station, roughly 0.7 miles north. A little further out are Lullingstone Castle (4.4 miles south-east) and Orpington Hospital (1.5 miles south). For a walk, there’s The Warren and Summer Hill.
Questions from Orpington
How do you handle parking and loading in Orpington?
A loading bay, a visitor permit or off-street space near the site in Orpington makes the visit easier to plan. Working overnight, as we often do in London, usually makes it simpler.
Can you work in Orpington outside opening hours?
Yes, we can come after you close and finish before you open. The work in Orpington can fit around your hours. Let us know the hours you’re closed and we will book within them.
What is TR19?
A BESA specification, with two parts that matter most here: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It isn’t law, but it’s the benchmark.
Can you come out in an emergency?
Yes, any time. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we will advise on what to do next.
Can one contract cover all our sites?
Yes. Send the list of sites and the work at each and we’ll quote them together.
How do you protect the area?
Protection goes down first: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
Do you work in Orpington?
Yes. Our area takes in London and the counties of South East England, and that includes Orpington.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
Places near Orpington
Also in Orpington
Part by part
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that won’t bend or flatten the fins.
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. A clean fan runs more smoothly.
What happens if it’s left?
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. Planning ahead in Orpington lets you pick a quiet night rather than lose a busy one.
When the work has to happen, how we reach it and how big the site is can all change the price. We take each of them into account, and the price is fixed before any work starts.
Why us?
- CHAS and SafeContractor accredited, with ISO 9001
- A written report with pictures after each visit
- A single point of contact for sites across the South East and London
- Evenings, overnight and weekends, plus 24/7 emergency callout
Take a look at our cost guide or our accreditations and certificates.
What AHU cleaning cannot fix
In fairness, there are a few things this work will not fix:
- Ventilation that was badly designed in the first place
- Dirty ducts beyond the unit itself
- Mechanical faults with motors, belts or bearings
If in doubt, call us on 0345 646 2711 or drop us a line and we’ll say what we think.
What the work covers
- Dampers and louvres
- Drain trays
- Filter sections
- Internal panels
- Heating and cooling coils
- Supply and extract fans
For landlords and multi-site operators
Whether it’s one building or many, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We can quote either party and send the paperwork to whoever needs it.