Surrey · Air handling unit cleaning
AHU Cleaning in Tongham
AHU cleaning across Tongham and nearby, timed so the site keeps working and signed off in writing with pictures.
- Dirty fans and fan housings
- Blocked condensate drains and slimy trays
- Air handling units never cleaned inside
AHU cleaning in Tongham
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. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. We’re often asked to deal with drain trays holding standing water and debris and leaves in the fresh air intake, on internal panels, drain trays and supply and extract fans.
For a building near Tongham, the visit is planned around how it’s used, and the journey is planned ahead. The method does not change: inspect first, clean, then record what was done.
Each visit ends with a written report and photos, so there’s a dated record of the work. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Where
- Tongham (GU10)
- Wider area
- Surrey
- Paperwork
- Photo report after each visit
- Price
- A fixed quote up front
- Hours
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
How the job changes from site to site
Drain trays
Condensate from the coil drips into a tray beneath it. We clear standing water, clean out slime and check the outlet is draining.
Filters
What’s on the filters is a good clue to what’s further in. We photograph them for the report.
Tongham: your questions answered
Can ventilation in schools around Tongham be cleaned out of term?
Yes, and it’s the easiest time to do it. There are about 20 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Tongham. You can ring 0345 646 2711 or send us an email with the dates the site is empty.
Can the work in Tongham be done at night or at weekends?
Yes, we can come after you close and finish before you open. Your customers, staff or residents in Tongham needn’t be disturbed. Let us know the hours you are closed and we’ll book within them.
What do you do with what you remove?
Waste is contained during the work and removed when we leave, including grease, debris and dirty water. We do not leave it behind.
Are you fully insured?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
Do you need to switch the unit off?
Yes, while the clean is under way. Out-of-hours work is available so the building is not left without ventilation when it’s busy.
Do you work with multi-site operators?
Yes. One number covers all your sites across London and the South East, with visits on a regular schedule.
Is a quote from photos possible?
Often, 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.
Do you offer emergency callouts?
Yes. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line, and we will advise on what to do next.
When to call us in Tongham
Filters that are not changed or cleaned on time clog up, which cuts the airflow and can let air slip round the filter. After that, the coils and fan collect what the filter should have caught.
Common reasons sites call us are:
- Rooms that smell stuffy when the system runs
- Air handling units due a clean after building work
- Units that have only ever had filter changes
- Intake sections clogged with outdoor debris
If you run a surgery, dental practice or care home near Tongham, clean ventilation matters as much to you as to a hospital like Guildford Hospital (about 5.3 miles east).
Before booking anyone
- What insurance they carry
- What paperwork you get at the end
- Whether they recommend a next date
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
Why act early in Tongham
A light clean now is simpler than a heavy one later. Leave it for years and dirt bakes onto coils and casings, especially where there’s been moisture. A visit arranged in advance is far less disruptive than a callout on a busy day.
Every site is different, so we price each one individually. Size, access, the condition of the system and when we can work all make a difference.
Why us?
- Every visit written up, with photos
- Fully insured
- Trading since 2009
- A single point of contact for sites across the South East and London
Take a look at our cost guide or how to check a contractor.
What a clean won’t put right
In fairness, there are a few things this work will not fix:
- Dirty ducts beyond the unit itself
- Coils that are corroded or leaking and need replacing
- A system that’s undersized for the building
Not sure which it is? You can call us on 0345 646 2711, or email photos and we will tell you honestly.
Parts of the system we cover
- Heating and cooling coils
- Dampers and louvres
- Internal panels
- Supply and extract fans
- Drain trays
- Filter sections
Looking after it afterwards
Results last longer with the right care. Here’s what we suggest:
- Book the next check in line with the report
- Clear leaves and litter away from the intake
- Make sure the unit’s access doors open easily
- Flag stale or damp smells in the supply air
When we have closed the unit up, it can be restarted with your site team. Check the drain tray is emptying over the first few days to make sure it stays clear.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
Nearby places to Tongham
More services for Tongham
Landlords, agents and facilities managers
We regularly work with managing agents. Tell us the site, the work and the access arrangements and we will come back with a fixed quote.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Each site gets its own report and photos, so records stay tidy.
The process
There are three stages on the day: set-up, the treatment itself and the sign-off. Set-up means sheeting and making equipment safe, while signing off means the written report and photos. Most of the time goes on the work itself, and that takes half a day to a full day per unit, with large plant planned over several shifts. Evenings, weekends or a closed day all work for a site in a place like Tongham.
- 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.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Getting ready for the visit
- Tell us where we can park and unload
- Make sure equipment near the work can be switched off and left to cool
- Mention any sign-in, permit or induction we need
How to get a quote
Want a quote for AHU cleaning? Please call us on 0345 646 2711 or use the quote form with a few details about the site. We will talk you through the work and give you a fixed quote before anything is booked.
Read more
AHU cleaning around Tongham
The FSA’s food hygiene register lists about 20 schools, colleges and universities and about 15 caring premises (care homes, nurseries and hospitals) with registered kitchens or food service across Tongham and its immediate surroundings (about a mile and a half). Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. We cover Tongham, about 33 miles from central London, as part of our work across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site. For Tongham, the closest hospital is Guildford Hospital, roughly 5.3 miles east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Wherever a school like St Paul's CofE Infant School & Nursery has ducted ventilation, a half-term visit keeps the work out of lesson time.
Tongham is about 1 mile south-east of Aldershot, in Surrey. Whether your site is in the middle of Tongham or further out, AHU cleaning is available to all kinds of commercial premises, from small sites to large estates. Tongham is one of 395 places in Surrey where we work for commercial clients. You can also see our page for Guildford, about 7 miles away.
AHU cleaning in GU10 is surveyed, quoted and booked the same way as anywhere else. We cover sites on The Street, Chester Way and Lambourne Way and nearby roads. Close by, we work in Sandy Cross (1 mile south), Ash (1 mile north-east), Seale (1 mile south-east), Ash Green (1 mile north-east) and Badshot Lea (1 mile west). Larger places within reach include Guildford (7 miles east), Woking (9 miles north-east), Camberley (7 miles north), Farnham (3 miles south-west), Frimley (6 miles north) and Haslemere (10 miles south).
Landmarks near Tongham
We work in commercial kitchens and buildings around Aldershot Park, The White Hart pub and Ash Manor School, among other places. The nearest railway station is Ash station, about 1.4 miles north-east. Other landmarks nearby include Farnham Castle (3.2 miles west) and Guildford Hospital (5.3 miles east). Open spaces near Tongham include Aunt's Pool and Hog's Back.