Surrey · Air handling unit cleaning
Air handling unit cleaning in Chaldon, Surrey
Professional AHU cleaning in and around Chaldon, booked around your opening hours and signed off in writing with pictures.
- Odours coming through the supply air
- Dust built up on fan impellers
- Drain trays holding standing water
Landlords, agents and facilities managers
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 each one has its own record.
Whether it’s one building or many, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with photos.
AHU cleaning in Chaldon, done properly
If the units serving a building in Chaldon have only had filter changes for years, the coils, fan and casing can be carrying far more dirt than anyone has seen. A full clean deals with all of it. The work covers supply and extract fans, heating and cooling coils and internal panels, and common reasons people get in touch are dust-coated heating and cooling coils and air handling units due a clean after building work.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
Think of the report as the system’s health record: a dated account with photos of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal, ready for your insurer.
- Location
- Chaldon (CR3)
- Region
- Surrey
- Reporting
- Report and pictures after the visit
- Price
- Fixed quote, typically within a working day
- When we work
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Between visits
So the system stays in good health:
- Report musty smells from the vents straight away
- Make sure the unit’s access doors open easily
- Clear leaves and litter away from the intake
- Keep the certificate and photo report with the plant records
Once the clean is done, we send a TR19® certificate and a report with before and after pictures. They belong in the plant or maintenance log.
Regular filter changes are the best protection an AHU has. Once filters clog, dirt starts getting past them.
Honest limits
A few issues sit outside what this work can do:
- Damaged coils beyond cleaning
- Problems with the unit’s controls or sensors
- Faulty motors, drives or bearings
Not sure which it is? You can call us on 0345 646 2711 or drop us a line and we will tell you honestly.
Parts of the system we cover
- Dampers and louvres
- Heating and cooling coils
- Internal panels
- Filter sections
- Drain trays
- Supply and extract fans
Part by part
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. Cleaning keeps it running as intended.
Filters
What’s on the filters is a good clue to what’s further in. We photograph them for the report.
Why deal with it now?
Stuffy rooms and stale smells in a building in Chaldon can sometimes be traced back to the AHU. Cleaning it deals with the cause rather than the symptom. If the system at a site near Chaldon fails, there may be nowhere nearby to move to.
What you pay reflects the actual work. That’s why every job is surveyed first, and the price is agreed before any work starts.
Why us?
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- CHAS and SafeContractor accredited, with ISO 9001
- Ventilation hygiene specialists since 2009
Take a look at how cleaning jobs are priced and how to check a contractor.
Ventilation in Chaldon buildings
There are about 12 schools, colleges and universities and about 18 caring premises (care homes, nurseries and hospitals) on the FSA’s food hygiene register within roughly a mile and a half of the centre of Chaldon. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. At about 15 miles from central London, Chaldon sits well inside the area we cover. Visits are booked around your hours, evenings and weekends included. About 0.5 miles north-east of Chaldon is St Lawrence's Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Healthcare buildings such as St Lawrence's Hospital, about 0.5 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Chaldon, yours matters too.
Chaldon is about 1 mile south-west of Caterham, in Surrey. Anywhere in CR3, we cover AHU cleaning for commercial sites. 395 places in Surrey are on our list, large and small. There’s also a page for London, roughly 15 miles from Chaldon.
AHU cleaning in CR3 is surveyed, quoted and booked the same way as anywhere else. That includes premises on Mount Avenue, Linden Drive and Marshall Close and nearby roads. Chaldon sits on or near the B2031, which makes travel easy for evening and night visits. Other places close to Chaldon include Netherne on-the-Hill (2 miles north-west), Merstham (2 miles west), Brewer Street (2 miles south), South Merstham (2 miles south-west) and Hooley (2 miles west). We also work in nearby towns such as Epsom (8 miles north-west), Horley (7 miles south), Redhill (4 miles south-west), Ewell (8 miles north-west), Reigate (5 miles south-west) and Walton-on-Thames (15 miles north-west).
Near you in Chaldon
In Chaldon, that means kitchens and buildings near de Stafford School, Kitchen Copse and The King And Queen Public House, among other places. The nearest railway station is Caterham station, about 1.2 miles east. Well-known places in the area include Bletchingley Castle (2.8 miles south) and St Lawrence's Hospital (0.5 miles north-east). Open spaces near Chaldon include South London Downs National Nature Reserve and Nore Hill.
More services for Chaldon
The process
When we arrive, we check the system against the survey or the photos you sent. If anything is different, we talk it through with the person on site before carrying on. After that, the work takes from a few hours for a compact unit to a day or more for a large one. A quick note on how to find the site and where to park makes a visit to Chaldon run smoothly.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
Preparing for the visit
- Plan for cooking equipment or plant to be off before we arrive
- Name a contact who can let us in at the agreed time
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
How to get a quote
To help us quote: where the site is, what it is and its opening hours, a few photos and the last certificate or report, if there is one. Once you have those, phone us on 0345 646 2711 or email us.
Related advice
Questions from Chaldon
Can a school’s ventilation in Chaldon be done out of term time?
Yes. Half-terms and the summer break are the natural time for school work. Food Standards Agency records list about 12 schools, colleges and universities with registered kitchens within about a mile and a half of Chaldon. Tell us your holiday dates and we will book the visit for when the site is empty.
Can the work in Chaldon be done at night or at weekends?
Yes, out-of-hours work is a big part of what we do. The work in Chaldon can fit around your hours. Just ring 0345 646 2711 or send us an email with your opening times and we’ll plan around them.
What is TR19?
A BESA specification, with two parts that matter most here: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t legislation, but it’s the standard people check against.
Do you look at the system first?
Yes. For many sites, pictures and a few details are enough, and larger or hidden systems get a visit.
Do you work in Chaldon?
Yes. Chaldon is part of the area we cover, within the South East and London area we cover.
Do you offer emergency callouts?
Yes. Our emergency line runs 24/7 for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
Do you work with multi-site operators?
Yes. One number covers all your sites in our area, with visits on a regular schedule.
How much does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: the size of the system, its condition, access and when we can work. We fix the price before any work starts.
Signs you need AHU cleaning in Chaldon
Wherever there’s a cooling coil, there’s condensate. A blocked outlet or a badly sloped tray leaves standing water, and slime and smells soon follow.
Common reasons sites call us include:
- Dirty coils holding back the airflow
- Air handling units with blocked filters
- Units needing a clean before a new tenant or handover
- Plant that has been serviced but not cleaned
School buildings such as St Peter and St Paul CofE Infant School are typically done in the holidays, so classrooms are not disturbed.
What to look for in a quote
- What happens if part of the system can’t be accessed
- Whether VAT is included
- When they can work, and whether that’s outside your opening hours
- Whether a survey comes first