Surrey · Air handling unit cleaning
Air handling unit cleaning in Caterham, Surrey
AHU cleaning in Caterham from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Dirty fans and fan housings
- Plant that needs cleaning after a refit
- Condensate trays that will not empty
How we handle AHU cleaning in Caterham
Coils are where a lot of the dirt ends up. Dirt on the fins holds back air and makes the unit work harder to do the same job. We clean coils with methods suited to their condition, taking care not to damage the fins. The work covers internal panels, supply and extract fans and dampers and louvres, and people most often call us about plant that has been serviced but not cleaned and dirty coils holding back the airflow.
Buildings in towns like Caterham often have ventilation added in stages, with units on the roof or in a plant room. An inspection shows which parts need cleaning, so you are not paying for more than the system needs.
Each visit ends with a written report and photos, so you have a record of what was done and when. Kitchen extract cleaning to TR19® Grease is certificated through the BESCA Vent Hygiene Elite portal.
- Place
- Caterham (CR3)
- Wider area
- Surrey
- Records
- Written report with pictures
- Price
- Fixed quote, typically within a working day
- Hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
Looking after it afterwards
How long the results last depends on use and care. We suggest:
- File each AHU report in the maintenance log
- Report musty smells from the vents straight away
- Change filters on schedule and log each change
- Check the drain tray is emptying during routine visits
The report shows each section of the unit before and after, and note any part we couldn’t get to. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Make sure access doors and panels on the unit open easily. Sections that are awkward to open are the ones that get skipped.
Why deal with it now?
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, particularly where damp has made it stick. Nothing in a duct, damper or fan improves by being left.
The price reflects the work, not guesswork. That is 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
- Survey first, then a fixed quote
- Photo reports with every job
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
Common problems we fix in Caterham
Whatever surrounds a building in Caterham, the air drawn into its AHU carries dust, pollen and debris. The intake section and first filters take the brunt, and some travels further into the unit.
Any of these means the system needs a check-up:
- Fan sections that haven’t been cleaned in years
- Debris and leaves in the fresh air intake
- Coils clogged with dust and debris
- Blocked condensate drains and slimy trays
If you manage offices or shops near Caterham station, their ventilation can be inspected and cleaned out of hours.
Before you book anyone
- Whether the figure could change on the day
- Proof of accreditation you can verify
- Whether they recommend a next date
- What’s included in the scope, part by part
Towns and villages near Caterham
Also in Caterham
Managing agents and facilities teams in Caterham
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, which may be the employer, owner, landlord, FM or managing agent. With shared responsibility, good records help everyone.
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we are happy to quote for all of it.
What affects the cost of AHU cleaning
We quote each job individually. This is what makes a difference:
- Any permits to work or inductions
- How big the system is
- Whether we need access equipment or extra panels
- The times the site is available
A single site or a whole portfolio, 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.
What we need to know
The more you tell us, the more accurate the quote. With your enquiry, please include:
- When the site is open and when it’s quiet
- Any previous report or certificate
- Detail shots of panels, filters and grilles
- Any symptoms, from odd noises to smells or leaks
Some systems can be priced from photos; others need a survey. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, you get a fixed price before any work starts.
What AHU cleaning can’t fix
We’d rather tell you now than book work that won’t help, so here are the limits:
- Mechanical faults with motors, belts or bearings
- A system that’s undersized for the building
- Damaged coils beyond cleaning
If you’re not sure, just ring 0345 646 2711 or use the quote form and we’ll give you a straight answer before you book.
Parts of the system we cover
- Internal panels
- Supply and extract fans
- Dampers and louvres
- Heating and cooling coils
- Filter sections
- Drain trays
AHU cleaning in Caterham: local notes
The FSA’s food hygiene register lists about 15 schools, colleges and universities and about 20 care, childcare and hospital premises with registered kitchens or food service in and around Caterham, up to about a mile and a half out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. For Caterham, the closest hospital is Caterham Dene Hospital, roughly less than half a mile south-east. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. About 15 miles out from central London, Caterham is part of the South East area we work across. The visit is fixed around your opening hours, not ours.
For schools like Hillcroft Primary School, the holidays are the usual time to inspect and clean ventilation. Healthcare buildings such as Caterham Dene Hospital, about less than half a mile south-east, depend on their ventilation; if you manage a surgery, clinic or care home near Caterham, yours matters too.
Caterham is about 11 miles south-west of Orpington, in Surrey. Across the CR3 area, we can take on AHU cleaning. We cover 395 places across Surrey, large and small. You can also see our page for London, about 15 miles away.
Every address in CR3 is within our area for AHU cleaning, from busy streets to back roads. You will find streets such as High Street, London Road and Park Road, all of which we cover for AHU cleaning. With the B2030 and B2031 close by, Caterham is simple for us to get to for AHU cleaning. We also cover Woldingham Garden Village (2 miles east), Tyler's Green (2 miles south-east), Woldingham (3 miles east), Godstone (3 miles south) and Church Town (3 miles south-east). Further out, we also cover Epsom (8 miles north-west), Horley (8 miles south-west), Redhill (5 miles south-west), Ewell (8 miles north-west), Reigate (6 miles south-west) and Walton-on-Thames (15 miles north-west).
Local landmarks in Caterham
Locally, jobs take us to businesses close to Sunnydown School, The King And Queen Public House and de Stafford School. The closest station to Caterham is Caterham station, about 0.7 miles south-east of the centre. A little further out are Bletchingley Castle (3.4 miles south) and East Surrey Museum (0.6 miles south-east). Open spaces near Caterham include South London Downs National Nature Reserve and Mercers Lake.
Questions from Caterham
Do you cover Caterham for AHU cleaning?
Yes, Caterham is within the area we cover across London and the South East. Get in touch with the details and we will arrange a survey.
Do you clean school ventilation in Caterham in the holidays?
Yes, out-of-term visits are normal for schools. With about 15 schools and colleges on the FSA’s register within roughly a mile and a half of Caterham, it pays to plan holiday dates ahead. Booking early in the term gives the best choice of holiday dates.
What does AHU cleaning cost?
It depends on the site, so we quote each one individually. To get one, phone us on 0345 646 2711 or drop us a line with the site type, opening hours and a few photos.
Do you give a certificate after the clean?
Yes. A TR19® certificate and photo report are sent after the clean, with any faults we noticed.
Can you clean the AHU out of hours?
Yes. Evening, overnight and weekend work is all possible, so offices, schools and shops can carry on.
Which parts of an air handling unit do you clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. We confirm the scope after looking at the unit.
Are you accredited?
BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001. We have been trading since 2009 and we are fully insured.
Can you set up regular visits?
Yes. We run scheduled maintenance contracts, set at the interval the system needs. The report from each visit recommends the next date.
How the visit works
A visit follows the same order every time: protect the area, isolate whatever needs isolating, carry out the AHU cleaning, clear away and leave you the report. The visit itself takes half a day to a full day per unit, with large plant planned over several shifts. A few pictures of the system and its access points help us plan a visit in Caterham.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- We clean out the drain tray and make sure it drains.
- We close up the unit and send the certificate and before and after pictures.
Before we arrive
- Make sure someone can let us in and lock up afterwards
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Tell us the best time to work, such as after service or at a weekend
Getting a quote
We do not publish a price list, because no two systems are the same. We look at your system first, from photos or on a visit, and then give you a fixed quote. To start, phone us on 0345 646 2711 or drop us a line.