Greater London · Air handling unit cleaning
Croydon AHU cleaning
Specialist AHU cleaning for Croydon: diagnosis first, then a fixed quote, the work and a report with photos. Ask us for a fixed quote.
- Rooms that smell stuffy when the system runs
- Dirty coils holding back the airflow
- Dust built up on fan impellers
AHU cleaning for kitchens and businesses in Croydon
An air handling unit is the heart of a building’s ventilation: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Whatever builds up inside it travels with that air, so cleaning the unit matters as much as cleaning the ducts. The work covers filter sections, drain trays and internal panels, and common reasons people get in touch are intake sections clogged with outdoor debris and dust built up on fan impellers.
Many London buildings have had their ventilation extended and altered through several fit-outs, with old runs left behind that are hard to reach. In Croydon, as elsewhere, cleaning starts with an inspection of what’s there.
Accreditations are easy to claim and worth checking. Ours are BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Place
- Croydon (CR0, CR2, CR9, CR8)
- Region
- Greater London
- Paperwork
- Photo report after every visit
- Quotes
- Fixed quote, typically within a working day
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Questions from Croydon
Does London parking affect a job in Croydon?
London parking can be tight, so details of loading bays and permits help. Where restrictions apply in the day, an evening or overnight visit typically gets round them.
Can you come to Croydon after we close?
Yes, evening, overnight and weekend work is normal for us. Your customers, staff or residents in Croydon needn’t be disturbed. Tell us your opening hours when you ask for a quote.
Will you repair the fan or motor?
Mechanical repairs to the unit are for your HVAC maintenance contractor. We clean the unit and report anything we see that needs attention.
Are you fully insured?
Yes. Full insurance covers our work, and we’ve been trading since 2009.
Can you quote from photos?
Yes, if we can see what we need. If not, a site survey comes first, and the quote follows that.
Do you need to switch the unit off?
Yes. We can’t clean a running unit, so it’s switched off and made safe first. The shutdown is planned with whoever runs the building.
Do you survey before quoting?
Yes. Every job is surveyed first, from your pictures and details, or with a visit where necessary. A fixed quote follows.
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 we will suggest an interval after the first clean.
Aftercare tips
To keep the system working properly between visits:
- Look at the condensate drain whenever the unit is serviced
- Do not store bins or materials near the intake
- Make sure the unit’s access doors open easily
- Book the next check in line with the report
The ducts served by the unit may need attention too. A clean unit feeding dirty ducts only solves half the problem, and we can quote for both.
Check drain trays and condensate drains during routine maintenance. A drain that’s cleared early never gets to the slime stage.
Fixed quotes for AHU cleaning in Croydon
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Site rules, permits and inductions
- How many systems or sites are involved
- The condition of the system
- Access, including roofs, risers and ceiling voids
One small site or a whole estate, the quote is built the same way: the work involved, the access and the timing. The price is fixed before we start.
What we need to know
You don’t need the technical terms. Just send:
- Wide pictures of the system and the area around it
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Any symptoms, from odd noises to smells or leaks
- Close-ups of filters, grilles, hatches or access panels
The quickest way to a quote is to send photos: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and we can price many jobs without a visit.
When to call us in Croydon
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.
These are the problems we see most often:
- Plant that has been serviced but not cleaned
- Dust built up on fan impellers
- Air handling units due a clean after building work
- Debris and leaves in the fresh air intake
Classrooms and halls at schools such as Heathfield Academy are easiest to work in when pupils are away.
Before booking anyone
- How areas they can’t reach will be recorded
- Whether they’re fully insured
- Whether the whole system is included, or only the parts that are easy to reach
- Proof of accreditation you can verify
What AHU cleaning looks like in Croydon
Going by the FSA’s register, there are about 34 schools, colleges and universities, about 116 care, childcare and hospital premises and about 20 hotels and B&Bs serving food across Croydon and its immediate surroundings (about a mile and a half). Busy, occupied buildings like these are where clean supply air matters most. Ventilation cleaning in London buildings is typically planned for evenings or weekends. For Croydon, the closest hospital is Croydon University Hospital, roughly 1.7 miles north. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
If you manage offices or shops near South Croydon station, their ventilation can be inspected and cleaned out of hours. Hospitals such as Croydon University Hospital (about 1.7 miles north) show how much a building can rely on clean ventilation, and smaller healthcare sites near Croydon are no different.
Croydon is about 9 miles south of London, in Greater London. We provide AHU cleaning for commercial premises of every kind in Croydon and the rest of Greater London. 764 places in Greater London are on our list, from busy centres to quieter spots. You can also see our page for London, about 9 miles away.
We work across the CR0, CR2, CR9 and CR8 postcode area for AHU cleaning and the roads nearby. If you need AHU cleaning at premises on High Street, Church Road and Ruskin Square or a nearby road, we can help. Croydon is on the A235 and B243, so it’s easy for us to get to for AHU cleaning. We also cover South Croydon (1 mile south), Coombe (1 mile east), Addiscombe (2 miles north-east), Ashburton (2 miles north-east) and Woodside (2 miles north-east). Larger places within reach include London (9 miles north), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Around Croydon
In Croydon, that means kitchens and buildings near Cambridge Tutors College, Rutherford School and Keg & Grill pub and the streets around them. There’s a railway station in Croydon itself: South Croydon station. Other landmarks nearby include Croydon Airport Visitor Centre (1.2 miles south-west) and Croydon University Hospital (1.7 miles north). Not far away are Roundshaw Downs and Duppas Hill.
Places near Croydon
More services for Croydon
For landlords and multi-site operators
Where a tenant occupies the premises but the landlord owns the building, the lease normally sets out who maintains what. We can quote either party and send the paperwork to whoever needs it.
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.
What we do, step by step
Before we leave, we walk the area with whoever is on site. We point out anything that couldn’t be reached or needs a follow-up, and the same goes into the written report. All told, the work takes one overnight shift for many single units, with bigger plant phased. If your building in Croydon has sign-in rules, permits or key holders, mention them when you book.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Preparing for the visit
- Find the previous report, if there is one
- Mention any sign-in, permit or induction we need
- Make sure someone can let us in and lock up afterwards
How to get a quote
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. A few photos and your last certificate or report help a lot. You’ll usually have a quote within one working day.
Advice
Honest limits
An honest diagnosis matters more to us than a booking, so here’s what AHU cleaning won’t do:
- Building management system faults
- A system that’s undersized for the building
- Coils that are corroded or leaking and need replacing
Not sure which it is? You can call 0345 646 2711 or send us an email and we will tell you honestly before booking.
What the work covers
- Filter sections
- Drain trays
- Supply and extract fans
- Internal panels
- Heating and cooling coils
- Dampers and louvres
What the work involves, part by part
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.
Filters
Dirty filters cut airflow and let dirt slip past their frames. We clean the frames and rails so the filters sit tight.