Greater London · Air handling unit cleaning

Thornton Heath AHU cleaning

AHU cleaning for Thornton Heath and the surrounding area: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.

  • Leaves and litter drawn into the unit
  • Dust-coated heating and cooling coils
  • Dust built up on fan impellers

AHU cleaning near Thornton Heath

AHU cleaning in Thornton Heath, done properly

Units vary a lot in size, age and layout, whether it’s a compact unit in a ceiling void or a big unit on the roof. We look at the unit first, from photos or a site visit, and send you a fixed quote, so you know where you stand. If you are dealing with units that have only ever had filter changes and plant that needs cleaning after a refit, we can put it right.

Many London buildings have had their ventilation extended and altered through several fit-outs, with old runs left behind that are hard to reach. An inspection first shows where cleaning is needed in a building in Thornton Heath.

We have been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we’re fully insured.

Location
Thornton Heath (CR7, SW16, SE25)
Region
Greater London
Paperwork
Report and pictures after the visit
Quote
Fixed quote, normally within a working day
Working hours
When your site is closed, plus a 24/7 line
Phone
0345 646 2711
Updated
30 October 2026
Duct Doctor duct and vent cleaning vans lined up in a car park with the team

Multi-site and managed buildings

Running several sites is easier with one contractor. We cover South East England and London, so visits at different addresses can be planned together and kept to a regular schedule.

For anyone managing more than one site, we can plan visits across the whole estate and price them together. Every building has its own written report, so records stay tidy.

What the work involves, part by part

Internal casing and panels

Dust settles on every internal surface of the unit. Each section is cleaned from the intake through to the outlet.

Rooftop and plant room units

Many AHUs sit on roofs or in plant rooms with limited access. We plan safe access as part of the survey so the quote reflects it.

What AHU cleaning can’t fix

It’s worth knowing the limits before booking:

  • The supply and extract ducts, quoted separately
  • Controls and BMS settings that run the unit
  • Breakdowns that need a mechanical engineer

If in doubt, call us on 0345 646 2711 or send us an email and we will say what we think before you book.

Where we work

  • Dampers and louvres
  • Heating and cooling coils
  • Supply and extract fans
  • Internal panels
  • Drain trays
  • Filter sections

What staff can safely do

Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.

A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings need training, the right equipment and safe access. That is our job.

What AHU cleaning looks like in Thornton Heath

Food Standards Agency data includes about 39 schools, colleges and universities, about 136 hospitals, care homes and childcare premises and about 10 hotels and guest houses within roughly a mile and a half of the centre of Thornton Heath. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Croydon University Hospital is the nearest hospital, about 0.7 miles south of Thornton Heath. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first.

If you run an office near Thornton Heath station, its supply ductwork can gather dust for years before anyone looks inside. For schools like Winterbourne Junior Girls' School, the holidays are the usual time to inspect and clean ventilation. If you run a surgery, dental practice or care home near Thornton Heath, clean ventilation matters as much to you as to a hospital like Croydon University Hospital (about 0.7 miles south).

Thornton Heath is about 7 miles south of London, in Greater London. Thornton Heath 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 pictures. 764 places in Greater London are on our list, large and small. London is in our area too, about 7 miles from Thornton Heath.

Postcode districts we cover here for AHU cleaning: CR7, SW16 and SE25. If you need AHU cleaning at premises on Ena Road, Elm Road and Mayo Road or a nearby road, we can help. With the A23 and A212 close by, Thornton Heath is simple for us to get to for AHU cleaning. We also cover the places around Thornton Heath: Norbury (1 mile north), Pollards Hill (1 mile north), Mitcham (2 miles west), Hackbridge (2 miles west) and Eastfields (2 miles west). Larger places within reach include London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (8 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).

What’s near Thornton Heath

Around Thornton Heath, our work takes us to kitchens and buildings near The Archbishop Lanfranc School, Prince George pub and Grangewood Park. There’s a railway station in Thornton Heath itself: Thornton Heath station. Nearby you will also find Centrale Croydon (1.7 miles south) and Croydon University Hospital (0.7 miles south). Not far away are Biggin Wood and Duppas Hill.

Map of Thornton Heath © OpenStreetMap contributors

What affects the quote in Thornton Heath

The quote reflects the site in front of us. We consider:

  • The size of the system
  • Whether several sites go on one quote
  • How easy every part is to reach
  • Whether it’s a one-off visit or part of a schedule

Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered and we’ll price it together.

What we need to know

To help us quote quickly, send us:

  • The postcode and the type of business
  • The times we could work without disrupting the site
  • Detail shots of panels, filters and grilles
  • A few general shots of the system

Want a quote for AHU cleaning? Please give us a ring on 0345 646 2711, or email photos with a few details about the site. We will talk you through the work and send you a fixed quote before you commit to anything.

Thornton Heath: your questions answered

Can you work in Thornton Heath outside opening hours?

Yes, evening, overnight and weekend work is normal for us. Your customers, staff or residents in Thornton Heath needn’t be disturbed. Just call 0345 646 2711 or drop us a line with your opening times and we will plan around them.

Does London parking affect a job in Thornton Heath?

Tell us where a van can stop near your site in Thornton Heath, and about any building rules on loading. Night visits tend to make loading easier on London streets.

How do you protect the area?

We start with protection: sheeting over floors, worktops and anything close to the work. The area is left tidy, with our waste taken away.

How long will the unit be out of action?

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 will confirm the time when we quote.

What does TR19 mean?

TR19® is BESA’s specification for ventilation hygiene. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.

When should our AHU next be cleaned?

There’s no single answer; it comes down to the building and the unit. Regular inspection shows when it’s due, and the report recommends a next date.

Do you cover Thornton Heath?

Yes. We cover Thornton Heath and the rest of Greater London, as part of our work across South East England and London. For a fixed quote, call 0345 646 2711 or send us an email.

Can you clean the ducts connected to the AHU?

Yes. Ventilation ductwork cleaning to TR19® Air is part of what we do. Cleaning the unit and ducts together often makes sense, and we can quote for both.

The process

Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, do the work, tidy up and leave you the report. The visit itself takes anything from half a day for one small unit to several shifts for a plant room full of them. We fit London jobs around the building rather than the other way round, so a visit in Thornton Heath is typically out of hours.

  1. We agree a shutdown window that suits the building.
  2. We take before pictures of each section of the unit.
  3. Filters, coils and internal surfaces are cleaned from intake to discharge.
  4. We finish with the fan section and the drain tray.
  5. After photos are taken and the certificate issued.

Preparing for the visit

  • Have your last certificate or report to hand
  • Make sure someone can let us in and lock up afterwards
  • Let us know about parking and loading

Get a fixed quote

For AHU cleaning in Thornton Heath, call us on 0345 646 2711 or use the quote form. 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.

Ask for a quote

Related advice

Why act early in Thornton Heath

Leave an AHU uncleaned and the dirt does not stay put. It’s carried through the ductwork and out of the grilles, which is why the unit and the ducts are best cleaned together. A busy site in Thornton Heath builds up dirt and wear quickly, so putting it off makes the eventual job larger.

Every site is different, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all play a part.

Why book with us

  • Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
  • Fixed quotes, normally within one working day
  • Every job surveyed first
  • Photo reports with every job

See what affects the cost or our accreditations and certificates.

BESCA Vent Hygiene EliteMember, cleaning to BESA TR19® Grease
CHAS · SafeContractorISO 9001 and fully insured
Certificate and photo reportWith every clean
24/7 emergency calloutEvenings, nights and weekends
Since 2009South East England and London