Greater London · Air handling unit cleaning
Air handling unit cleaning in Crofton, Greater London
AHU cleaning for Crofton and the surrounding area: diagnosis first, then a fixed quote, the work and a report with pictures. Call for a fixed quote.
- Rooms that smell stuffy when the system runs
- Fan sections that haven’t been cleaned in years
- Debris and leaves in the fresh air intake
How we handle AHU cleaning in Crofton
An AHU clean is a thorough examination and treatment of the unit. We look inside each section, clean what we find and record it with photos, so the report shows exactly what was done. The work covers filter sections, supply and extract fans and heating and cooling coils, and common reasons people get in touch are dust built up on fan impellers and drain trays holding standing water.
In London, plant rooms are often in basements or on roofs reached through occupied floors, so work in Crofton is often done in the evening or at weekends. Parking and loading are agreed with the building in advance.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we are fully insured. On top of that, we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we’ve been trading since 2009.
- Where
- Crofton (BR6, BR5)
- Wider area
- Greater London
- Records
- Written report with photos
- Quotes
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
What happens on the day
The first job on site is protection: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. The work on site takes from a few hours for a compact unit to a day or more for a large one, and we clear up before we go. Most London sites cannot stop for the day, so work in Crofton is normally done overnight, early in the morning or at weekends.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
Before we arrive
- Have your last certificate or report to hand
- Let us know about parking and loading
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Ask for a quote
Want a quote for AHU cleaning? Please give us a ring on 0345 646 2711, or email photos and tell us about the site. We will talk you through the work and send you a fixed quote before you commit to anything.
Read more
How we price AHU cleaning
The survey tells us what the work involves. We look at:
- The number of sites or systems
- Parking and loading at the site
- When the work can happen, such as evenings, overnight or weekends
- The size of the system
Working hours, access and the scale of the site all affect the cost. We take each of them into account and give you a fixed price before work begins.
What we need to know
To help us quote quickly, please include:
- Where the site is and what kind of site it is
- The times we could work without disrupting the site
- A few general shots of the system
- Any access panels or hatches you can see
To get a fixed quote, phone us on 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. Photos and the last report, if you have one, make the quote quicker. You’ll usually have a quote within one working day.
AHU cleaning in Crofton: local notes
Food Standards Agency data includes about 10 schools, colleges and universities and about 19 caring premises (care homes, nurseries and hospitals) in and around Crofton, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. In London, ventilation plant is often on the roof or below ground, so the work is usually done out of hours. For Crofton, the closest hospital is Orpington Hospital, roughly 1.1 miles south-east. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Hospitals such as Orpington Hospital (about 1.1 miles south-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Crofton are no different. Workplaces around Orpington station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts.
Crofton is about 1 mile south-west of Orpington, in Greater London. Wherever you are in the BR6 postcode area, we can take on AHU cleaning. Crofton is one of 764 towns, villages and districts in Greater London where we work for AHU cleaning. For sites nearby, see our London page (11 miles or so).
We cover every part of the BR6 and BR5 postcode area for AHU cleaning and the streets around it. AHU cleaning is available to premises on Grange Road, Reed Avenue and Gumping Road and the roads around them. We also cover the places around Crofton: Broom Hill (1 mile north-east), Locksbottom (1 mile west), Petts Wood (1 mile north), Farnborough (1 mile south) and Green Street Green (2 miles south). Further out, we also cover London (11 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 (12 miles north-west).
Landmarks near Crofton
Typical jobs here are in premises near The Priory School, Newstead Wood School and The Maxwell pub and the streets around them. Crofton has its own railway station: Orpington station. Nearby you will also find Orpington Hospital (1.1 miles south-east) and Crofton Roman Villa (under half a mile south-east). The countryside around Crofton includes Summer Hill and The Warren.
Multi-site and managed buildings
From a single site to a large estate, you get the same standard: a survey first, a fixed quote, the work timed around the site and a report with pictures.
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. Where responsibility is shared, records matter even more.
Questions from Crofton
Can a school’s ventilation in Crofton be done out of term time?
Yes, holiday work suits schools best. The FSA’s register shows about 10 schools and colleges with food registrations within roughly a mile and a half of Crofton. Tell us your holiday dates and we will book the visit for when the site is empty.
Does London parking affect a job in Crofton?
We plan it in advance, so let us know about loading bays, permits and access rules at the building. Night visits tend to make loading easier on London streets.
How do you keep the site clean during the work?
With sheeting and covers, before anything else happens. We keep the work contained and clean down when we finish.
Can you set up regular visits?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, depending on what the system needs.
Which accreditations do you hold?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we are fully insured.
Will we get paperwork for the AHU clean?
Yes. Every clean comes with a TR19® certificate and a photo report. Keep them in the maintenance log.
How long does it take to clean an air handling unit?
Expect it to take a single shift for a typical unit, longer for large or heavily soiled ones. Size, layout and how dirty it is decide the rest, and we’ll confirm the time when we quote.
Can you look after several sites?
Yes. You deal with one contact for every site in our area, with visits on a regular schedule.
Honest limits
Before you book, it helps to know what’s not included:
- A system that is undersized for the building
- Ductwork downstream of the unit, which is a separate clean
- Breakdowns that need a mechanical engineer
If you are not sure, just call 0345 646 2711, or email photos and we’ll give you a straight answer before booking.
Where we work
- Internal panels
- Drain trays
- Filter sections
- Supply and extract fans
- Dampers and louvres
- Heating and cooling coils
Signs you need AHU cleaning in Crofton
Whatever surrounds a building in Crofton, the air drawn into its AHU carries dust, pollen and debris. Most of it lands at the intake and the first stage of filters, and some travels further into the unit.
Keep an eye out for these warning signs:
- Dirty filters cutting the airflow
- Condensate trays that will not empty
- Stale or musty smells from the ventilation
- Dust-coated heating and cooling coils
Wherever a school like Crofton Infant School has ducted ventilation, a half-term visit keeps the work out of lesson time.
What to look for in a quote
- Exactly which parts of the system are covered
- Whether the work can be done while the site is closed
- When the next visit should be, and why
- If the quote is a fixed price or an estimate
Nearby places to Crofton
More services for Crofton
Why it’s worth doing now in Crofton
Dirty coils and fans make the unit strain to move the same air. The result is extra wear and a building that does not feel as comfortable, and a planned clean is far less disruptive than a breakdown. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
One small site or a whole estate, we price it on the same basis: what needs doing, how we get to it and when. The price is fixed before any work starts.
Why us?
- CHAS and SafeContractor accredited, with ISO 9001
- Fully insured
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A fixed price before any work starts
See our cost guide and our accreditations.
Part by part
Internal casing and panels
We open each section through its doors and close them securely when we’re done before the unit is handed back.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.