Surrey · Air handling unit cleaning
Chelsham AHU cleaning
Looking for AHU cleaning in Chelsham? We diagnose first, fix the price and book the work around your hours, finishing with a written report and photos.
- Odours coming through the supply air
- Units that have only ever had filter changes
- Dirty filters cutting the airflow
About our AHU cleaning in Chelsham
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. Common call-outs are for odours coming through the supply air and leaves and litter drawn into the unit, across heating and cooling coils, filter sections and internal panels.
In rural areas, ventilation units are often in roof voids or outbuildings, which makes them easy to overlook.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with photos, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Chelsham (CR6)
- Wider area
- Surrey
- Records
- Photo report after every visit
- Quote
- A fixed price before work begins
- Working hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
Between visits
To keep the system working properly between visits:
- Keep the certificate and photo report with the plant records
- Keep the area around the fresh air intake clear
- Note any water around the unit or leaks below it
- Make sure condensate is draining away
The report suggests a date for the next inspection or clean, based on what we found. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Regular filter changes are the best protection an AHU has. Once filters clog, dirt starts getting past them.
AHU cleaning around Chelsham
About 13 miles out from central London, Chelsham is part of the South East area we work across. A survey and a fixed quote come first, then the visit at a time that suits you. About within half a mile north of Chelsham is Warlingham Park Hospital, the nearest hospital. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
If you run a surgery, dental practice or care home near Chelsham, clean ventilation matters as much to you as to a hospital like Warlingham Park Hospital (about within half a mile north).
Chelsham is about 3 miles north-east of Caterham, in Surrey. Sites in Chelsham get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with photos. 395 places in Surrey are on our list, large and small. For sites nearby, see our London page (13 miles or so).
AHU cleaning in CR6 is surveyed, quoted and booked the same way as anywhere else. Whether your site is on Chelsham Common and Chelsham Road or anywhere close by, our technicians can take on the work. Other places close to Chelsham include Farleigh (1 mile north), Warlingham (1 mile west), Hamsey Green (1 mile west), Fickleshole (1 mile north-east) and New Addington (2 miles north). Further out, we also cover Epsom (10 miles west), Horley (11 miles south-west), Redhill (8 miles south-west), Ewell (10 miles west), Reigate (9 miles south-west) and Caterham (3 miles south-west).
Landmarks near Chelsham
We work in commercial kitchens and buildings around Warlingham School, Ledgers Wood and Hare & Hounds pub, among other places. For rail, the closest station is Woldingham station, about 1.9 miles south-west. Nearby you will also find Warlingham Park Hospital (less than half a mile north) and East Surrey Museum (3 miles south-west). Open spaces near Chelsham include Hutchinson's Bank and Nore Hill.
Signs you need AHU cleaning in Chelsham
Most units live out of sight on roofs, in plant rooms or in ceiling voids, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
Most sites get in touch after spotting something like this:
- Dust built up on fan impellers
- Debris and leaves in the fresh air intake
- Units that have only ever had filter changes
- Dust-coated heating and cooling coils
School buildings such as Warlingham Village Primary School are normally done in the holidays, so classrooms are not disturbed.
What your quote should include
- Whether they’re fully insured
- Proof of accreditation you can verify
- Whether the figure could change on the day
- What’s included in the scope, part by part
Common questions in Chelsham
Can you do AHU cleaning in Chelsham?
Yes. Our area runs across London and the South East, Chelsham included. You can phone us on 0345 646 2711 or email us and tell us what needs doing.
Can you work in Chelsham outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Chelsham can fit around your hours. When you phone us on 0345 646 2711, or send details by email, mention when the site is quiet.
Can we book visits on a schedule?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. The report from each visit recommends the next date.
How long does it take to clean an air handling unit?
It takes one overnight shift for many single units, with bigger plant phased. The unit’s size and condition make the biggest difference, and we’ll confirm the time when we quote.
Are you fully insured?
Yes, we’re fully insured. We also hold CHAS and SafeContractor for clients who vet their contractors.
Are you accredited?
We hold CHAS, SafeContractor and ISO 9001, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Do you offer emergency callouts?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we’ll advise on what to do next.
Will the ventilation be off while you clean?
Yes. Cleaning needs the unit off and isolated, so we plan it for a time that suits the building.
In-house cleaning or a specialist?
Staff cleaning and specialist work are not the same thing. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.
What we do, step by step
Before we leave, we walk the area with whoever is on site. Anything we couldn’t reach or that needs attention is pointed out there and then, and it goes on the report too. The visit takes half a day to a full day per unit, with large plant planned over several shifts. If the van will struggle with a lane or gateway near Chelsham, let us know and we will plan around it.
- 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.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Name a contact who can let us in at the agreed time
- Tell us about site rules, permits or sign-in
- Agree a time when the area can be out of use
Ask for a quote
For AHU cleaning in Chelsham, phone us on 0345 646 2711 or send us an email. Tell us what kind of premises it is and when it’s open, and send pictures or your last report if you can. A fixed quote normally follows within one working day.
Related advice
What the work involves, part by part
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. A clean gets air moving through the coil properly again.
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. We clean each section from intake to discharge.
What affects the cost of AHU cleaning
Sites vary more than people expect. What affects the quote:
- The times the site is available
- The number of sites or systems
- One-off work versus a regular cycle
- Where the site is and how we reach it
What you pay reflects the actual work. That’s why every job is surveyed first, and why the quote is fixed before any work starts.
Helping us quote
We can often survey from photos. Try to include:
- The postcode and the type of business
- Detail shots of panels, filters and grilles
- A few general shots of the system
- The roof, plant room or outside wall the system runs to
To get a fixed quote, call 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 will typically have a quote within one working day.
What AHU cleaning cannot fix
AHU cleaning can’t fix everything, and we’d rather say so up front. It won’t put right:
- Breakdowns that need a mechanical engineer
- The supply and extract ducts, quoted separately
- Controls and BMS settings that run the unit
Not sure which it is? You can ring 0345 646 2711 or email us and we will tell you honestly before you book.
Parts of the system we cover
- Internal panels
- Drain trays
- Dampers and louvres
- Heating and cooling coils
- Filter sections
- Supply and extract fans