Surrey · Air handling unit cleaning
Air handling unit cleaning in Westcott, Surrey
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Westcott, surveyed first and signed off with a written report and pictures. Call for a fixed quote.
- Condensate trays that will not empty
- Fan sections that haven’t been cleaned in years
- Debris and leaves in the fresh air intake
How we handle AHU cleaning in Westcott
If the units serving a building in Westcott have only had filter changes for years, there may be dirt on the coils, fan and casing that nobody has looked at. A full AHU clean takes in the whole unit. The work covers filter sections, supply and extract fans and drain trays, and common reasons people get in touch are air handling units due a clean after building work and dust-coated heating and cooling coils.
For a building in or near Westcott, access is agreed in advance and the visit is planned around the journey.
We’ve been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
- Location
- Westcott (RH4)
- Region
- Surrey
- Records
- Written report with pictures
- Price
- A fixed price before we start
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Last updated
- 30 October 2026
In-house cleaning or a specialist?
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to us.
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
Westcott: your questions answered
Do you offer AHU cleaning in Westcott?
Yes. Our area runs across London and the South East, Westcott included. You can give us a ring on 0345 646 2711 or email us and let us know what needs doing.
Can you come to Westcott after we close?
Yes, nights and weekends are routine for us. The site is handed back ready to open. Let us know the hours you are closed and we will book within them.
Are you insured?
Yes, fully. CHAS and SafeContractor accreditation sit alongside it, for sites that check contractor safety.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line for anything that cannot wait until a planned visit. Ring any time and tell us what’s happened.
What accreditations do you have?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
How long will the unit be out of action?
Typically the clean takes half a day to a full day per unit, with large plant planned over several shifts. We plan the shutdown around that, including evenings or weekends.
What’s TR19?
A BESA specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not law, but it’s the benchmark.
Do you offer maintenance contracts?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. Each report recommends when the next visit should be.
AHU cleaning around Westcott
For Westcott, the closest hospital is Headley Court, roughly 6 miles north-east. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital. We cover Westcott, about 22 miles from central London, as part of our work across London and the South East. Evening, overnight and weekend visits are all possible.
Healthcare buildings such as Headley Court, about 6 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Westcott, yours matters too.
Westcott is about 2 miles west of Dorking, in Surrey. If you need AHU cleaning in Westcott, it’s easy to get a fixed quote: please phone us on 0345 646 2711 or email us. Our area covers London and the South East, Westcott included. Our Surrey coverage runs to 395 places, and Westcott is one of them. Our Guildford page covers sites nearby, about 9 miles away.
Work in RH4 follows the same survey, fixed quote and written report as everywhere else we cover. We cover sites on Guildford Road, Chapel Lane and Stones Lane and the roads around them. Other places close to Westcott include Ranmore Common (1 mile north), Wotton (1 mile south-west), Dorking (2 miles east), North Holmwood (2 miles south-east) and Mid Holmwood (2 miles south-east). Larger places within reach include Guildford (9 miles west), Woking (11 miles north-west), Epsom (9 miles north-east), Horley (9 miles east), Redhill (9 miles east) and Ewell (10 miles north-east).
Near you in Westcott
Typical jobs here are in premises near The Priory CofE Voluntary Aided School, Milton Heath and The Nower and Pippbrook House, among other places. The closest station to Westcott is Dorking West station, about 1.4 miles north-east. Well-known places in the area include Headley Court (6 miles north-east) and Mesolithic Museum (2.4 miles south-west). For a walk, there’s Combe Bottom and Box Hill.
Towns and villages near Westcott
Other services in Westcott
Aftercare tips
Simple habits between visits make a real difference. Our advice:
- Store the TR19 paperwork where auditors can find it
- Look at the condensate drain whenever the unit is serviced
- Keep filter changes on time and recorded
- Do not store bins or materials near the intake
We recommend when the unit should next be inspected or cleaned, taking into account how dirty it was. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.
Part by part
Fans and fan sections
The fan section is cleaned with the unit switched off and isolated in agreement with the site.
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.
What affects the cost of AHU cleaning
You’ll get a fixed price before work begins. It takes into account:
- What state the system is in
- How big the system is
- When the work can happen, such as evenings, overnight or weekends
- Any permits to work or inductions
What you pay reflects the actual work. That is why we survey first, from pictures or on site, and the price is agreed before we start.
Helping us quote
When you contact us, these details help:
- Problems your staff have spotted
- The paperwork from the last visit, if you have it
- The roof, plant room or outside wall the system runs to
- Close-ups of filters, grilles, hatches or access panels
Some systems can be priced from photos; others need a survey. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before we start.
Do you need AHU cleaning in Westcott?
Air handling units are usually tucked away on roofs, in plant rooms or above ceilings, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
The symptoms we’re asked about most include:
- Air handling units never cleaned inside
- Coils clogged with dust and debris
- Air handling units with blocked filters
- Rooms that smell stuffy when the system runs
Wherever a school like Surrey Hills All Saints Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time.
What your quote should include
- Proof of insurance
- Exactly which parts of the system are covered
- Whether the price is fixed
- Whether inaccessible sections are listed on the report
The process
Protection comes first: sheeting goes over floors and surfaces close to the work. Then we make the system safe and start. The work on site takes a single shift for a typical unit, longer for large or heavily soiled ones, and we clear up before we go. The timing of a visit to Westcott is set by you, and the travel is our side of the planning.
- We look at the unit and the plant area during the survey.
- The area is protected and the unit made safe.
- 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.
Before we arrive
- Plan for cooking equipment or plant to be off before we arrive
- Tell us where we can park and unload
- Mention any sign-in, permit or induction we need
How to get a quote
To help us quote: the address, the type of site and when it’s open, pictures of the system and any previous report or certificate. Then phone us on 0345 646 2711 or use the quote form.
Advice
When something else is needed
Before you book, it helps to know what’s not included:
- Faulty motors, drives or bearings
- Dirty ducts beyond the unit itself
- Damaged coils beyond cleaning
Not sure which it is? You can call us on 0345 646 2711, or send details by email and we’ll tell you honestly before you book.
What the work covers
- Dampers and louvres
- Filter sections
- Supply and extract fans
- Internal panels
- Heating and cooling coils
- Drain trays