Surrey · Air handling unit cleaning
AHU Cleaning in Ash Vale
Professional AHU cleaning in and around Ash Vale, timed so the site keeps working and signed off in writing with pictures.
- Condensate trays that will not empty
- Dust-coated heating and cooling coils
- Rooms that smell stuffy when the system runs
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 call for the right kit, training and safe access. That’s our job.
Staff cleaning and specialist work aren’t 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. That part needs specialist access and equipment.
AHU cleaning in Ash Vale, done properly
A cooling coil drips condensate into a tray that should drain away. If the outlet blocks, standing water and slime build up, in the airstream that feeds the building. Clearing and cleaning the tray is central to every AHU clean. We are often asked to deal with debris and leaves in the fresh air intake and dirty fans and fan housings, across supply and extract fans, filter sections and drain trays.
Around a place like Ash Vale, ventilation systems tend to be in schools, surgeries, care homes and workplaces. Smaller systems still gather dust and need inspecting.
Duct Doctor has been trading since 2009, and we are 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.
- Location
- Ash Vale (GU12, GU14)
- Region
- Surrey
- Paperwork
- Report and photos after the visit
- Quotes
- A fixed price before we start
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
Questions from Ash Vale
Can you clean school ventilation in Ash Vale during the holidays?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 14 schools, colleges and universities with registered kitchens within about a mile and a half of Ash Vale. Send us your term dates when you phone us on 0345 646 2711 or use the quote form, and we’ll fit the work in.
Can you come to Ash Vale after we close?
Yes, nights and weekends are routine for us. The site is handed back ready to open. When you call us on 0345 646 2711 or use the quote form, mention when the site is quiet.
Where does the waste go?
We contain it and take it with us. We collect grease, debris and waste water as we go rather than letting it spread.
Do you survey before quoting?
Yes. Every job is surveyed first, from your pictures and details, or with a visit where necessary. Then you get a fixed quote.
Is a quote from pictures possible?
In many cases, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Where we can’t see enough, we arrange a survey.
Does the AHU have to be shut down for cleaning?
Yes, for the time we are working on it. Out-of-hours work is available so the building is not left without ventilation when it’s busy.
What do you clean inside the unit?
The main parts are the filters, coils, drain tray, fan and inside of the casing. The survey confirms what’s in your unit before we quote.
Is there a report after cleaning?
Yes. You get a TR19® certificate plus before and after pictures. They’re worth keeping with the plant records.
Fixed quotes for AHU cleaning in Ash Vale
We quote each job individually. This is what makes a difference:
- When the work can happen, such as evenings, overnight or weekends
- The size of the system
- Site requirements such as sign-in and permits
- One-off work versus a regular cycle
The price reflects the work, not guesswork. That is why we survey first, from photos or on site, and the price is agreed before work begins.
Asking for a quote
There’s no need for technical detail. Just send:
- Photos showing the whole system and its surroundings
- Your last certificate, test record or report
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The times we could work without disrupting the site
Want a quote for AHU cleaning? Please phone us on 0345 646 2711 or use the quote form with a few details about the site. We will explain what we’d do and send a fixed quote before anything is booked.
Between visits
To keep the system working properly between visits:
- Book the next check in line with the report
- Report stiff or damaged access doors
- Make sure condensate is draining away
- Flag stale or damp smells in the supply air
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can survey both.
Make the drain tray part of every maintenance visit. Catching a slow drain early stops standing water building up.
Why deal with it now?
If people in a building in Ash Vale complain about stuffy or smelly air, the AHU is worth looking at. Cleaning it deals with the cause rather than the symptom. Light use slows the build-up but doesn’t stop it.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Call for a fixed quote and we’ll explain each part.
Why choose Duct Doctor in Ash Vale
- CHAS, SafeContractor and ISO 9001
- We’re fully insured
- In business since 2009
- Fixed quotes, normally within one working day
Take a look at our cost guide and our accreditations.
Different parts, different methods
Rooftop and plant room units
Smaller units in ceiling voids are part of the work as well. We protect the area below before opening them.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.
What else we do in Ash Vale
How the visit works
Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, carry out the AHU cleaning, clear away and hand over the paperwork. The visit itself takes from a few hours for a compact unit to a day or more for a large one. Because the survey comes first, a visit to Ash Vale can normally be finished without a second trip.
- We look at the unit and the plant area during the survey.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Before we arrive
- Make sure someone can let us in and lock up afterwards
- Let us know when the site is closed or quiet
- Have your last certificate or report to hand
How to get a quote
Photos are the quickest way to a quote: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.
Advice
Ash Vale buildings and their air
Food Standards Agency data includes about 14 schools, colleges and universities, about 14 care, childcare and hospital premises and about 4 hotels and B&Bs within roughly a mile and a half of the centre of Ash Vale. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Frimley Park Hospital is the nearest hospital, about 3.8 miles north of Ash Vale. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. At about 32 miles from central London, Ash Vale sits well inside the area we cover. The visit is fixed around your opening hours, not ours.
If you run a surgery, dental practice or care home near Ash Vale, clean ventilation matters as much to you as to a hospital like Frimley Park Hospital (about 3.8 miles north). If you manage offices or shops near Ash Vale station, their ventilation can be inspected and cleaned out of hours.
Ash Vale is about 2 miles north-east of Aldershot, in Surrey. We provide AHU cleaning for businesses, landlords and public buildings in Ash Vale and the rest of Surrey. Our area takes in 395 places across Surrey, large and small. Guildford is in our area too, around 7 miles away.
We work across GU12 and GU14 for AHU cleaning and the streets around it. That includes premises on Station Road East, Station Road West and Waverley Drive and nearby roads. With the B3165 and B3166 close by, Ash Vale is easy for our technicians to reach for AHU cleaning. Close by, we work in Ash (1 mile south), North Camp (1 mile north-west), Mytchett (2 miles north), Ash Green (2 miles south-east) and Aldershot (2 miles south-west). Further out, we also cover Guildford (7 miles east), Woking (7 miles north-east), Camberley (5 miles north), Farnham (5 miles south-west), Egham (14 miles north-east) and Frimley (3 miles north).
Local landmarks in Ash Vale
Locally, jobs take us to businesses close to Ramillies Park, The Swan pub and National Aerospace Library, among other places. Ash Vale’s nearest station is Ash Vale station, roughly 0.5 miles north of the centre. Other landmarks nearby include Frimley Park Hospital (3.8 miles north) and Farnham Castle (4.7 miles south-west). Green spaces nearby include Aunt's Pool and Ash Ranges.
Signs you need AHU cleaning in Ash Vale
Filters catch most of the dust, but not all of it. The fine dust that passes the filters lands on the coils, the fan and the internal panels, a little more each month.
It’s time to book a visit if you see:
- Intake sections clogged with outdoor debris
- Dust built up on fan impellers
- Units that have only ever had filter changes
- Dust-coated heating and cooling coils
For schools like Shawfield Primary School, the holidays are the usual time to inspect and clean ventilation.
Questions to ask before booking
- Whether a written report and photos are included
- Exactly which parts of the system are covered
- What hours they’ll be on site
- Whether inaccessible sections are listed on the report