Oxfordshire · Air handling unit cleaning
AHU Cleaning in Didcot
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for commercial sites in Didcot and across Oxfordshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- Dirty filters cutting the airflow
- Dirty coils holding back the airflow
- Odours coming through the supply air
What the work involves, part by part
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that will not bend or flatten the fins.
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.
AHU cleaning in Didcot, done properly
Think of an AHU clean as a full check-up for the ventilation. Every section is opened, cleaned and photographed, so you can see the unit’s condition for yourself. Common call-outs are for odours coming through the supply air and coils clogged with dust and debris, on dampers and louvres, internal panels and heating and cooling coils.
Around a town like Didcot, the buildings with ducted ventilation are typically offices, schools, surgeries and care homes. Their supply and extract ducts all gather dust over time, and TR19® Air sets out how to inspect and clean them.
The report is your system’s health record: a dated account with photos of everything we did. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal and sits alongside the report.
- Where
- Didcot (OX11)
- Region
- Oxfordshire
- Paperwork
- Photo report after every visit
- Quotes
- A fixed quote up front
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Checked
- 30 October 2026
Leave it or put it right?
A clean unit feeds cleaner air into the ductwork, so the ducts and grilles stay cleaner between cleans. It also means the next inspection has less to find. The sooner the work is done, the simpler the job for a site in Didcot.
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. You will have a fixed price before we start.
Why Didcot businesses choose us
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- We diagnose before we treat
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Every visit written up, with photos
Take a look at how cleaning jobs are priced and our accreditations and certificates.
Landlords, agents and facilities managers
Keeping records across a portfolio is half the battle. Each visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.
We work for landlords, managing agents and facilities managers as well as the people running the site. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.
Also near Didcot
More services for Didcot
In-house cleaning or a specialist?
In-house cleaning and specialist cleaning do different jobs. 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. Reaching it takes a specialist with the right equipment.
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. What they can’t safely do is clean inside the ductwork, the fan or the risers, and that is where we come in.
AHU cleaning around Didcot
Going by the FSA’s register, there are about 5 schools, colleges and universities and about 7 hospitals, care homes and childcare premises serving food in and around Didcot, up to about a mile and a half out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Didcot is about 50 miles from central London, well within the area we cover across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site. Abingdon Community Hospital is the nearest hospital, about 4.8 miles north-west of Didcot. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
If you manage shops or offices close to Didcot Parkway station, a TR19® Air inspection shows whether the ductwork needs cleaning. If you manage a school such as Manor Primary School, ventilation cleaning is best booked for the holidays.
Didcot is about 10 miles south of Oxford, in Oxfordshire. For AHU cleaning in and around Didcot, please phone us on 0345 646 2711 or use the quote form for a fixed quote. Our area covers London and the South East, Didcot included. Our Oxfordshire coverage runs to 443 places, Didcot among them. For sites nearby, see our Oxford page, about 10 miles away.
Work in OX11 follows the same survey, fixed quote and written report as everywhere else we cover. Whether your site is on Station Road, Market Place and High Street or a nearby road, we can help. Didcot is on the A4130 and B4016, which makes it straightforward for our technicians to reach for out-of-hours visits. We also cover the places around Didcot: Great Western Park (1 mile west), Appleford-on-Thames (2 miles north), Milton (2 miles north-west), Sutton Courtenay (2 miles north-west) and Long Wittenham (3 miles north-east). Further out, we also cover Oxford (10 miles north), Abingdon-on-Thames (5 miles north), Thame (15 miles north-east), Wantage (8 miles west), Grove (8 miles west) and Faringdon (15 miles west). As one of the bigger places in Oxfordshire, Didcot has commercial sites of every size, and we cover all of them for AHU cleaning.
Local landmarks in Didcot
In Didcot, that means kitchens and buildings near Didcot Girls' School, The Queens Arms and UTC Oxfordshire. Didcot has its own railway station: Didcot Parkway station. Well-known places in the area include Abingdon Community Hospital (4.8 miles north-west) and Brightwell Castle (3.4 miles east). For a walk, there’s Mowbray Fields and Wittenham Clumps.
How it works
There are three stages on the day: set-up, the treatment itself and the sign-off. Getting ready means protecting surfaces and switching off what needs to be off, while signing off means the written report and pictures. Most of the time goes on the work itself, and that takes from a few hours for a compact unit to a day or more for a large one. A few pictures of the system and its access points help us plan a visit in Didcot.
- We agree a shutdown window that suits the building.
- We take before photos of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
How to prepare
- Name a contact who can let us in at the agreed time
- Tell us where we can park and unload
- Plan for cooking equipment or plant to be off before we arrive
Ask for a quote
To get a fixed quote, ring 0345 646 2711, or email photos and tell us the type of site, your opening hours and roughly what the system looks like. A few photos and your last certificate or report help a lot. You’ll usually have a quote within one working day.
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When to call us in Didcot
Most units live out of sight on roofs, in plant rooms or in ceiling voids, so they’re easy to forget about. Months can pass without anyone looking inside.
Common reasons sites call us are:
- Plant that needs cleaning after a refit
- Rooms that smell stuffy when the system runs
- Fan sections that haven’t been cleaned in years
- Coils clogged with dust and debris
Healthcare buildings such as Abingdon Community Hospital, about 4.8 miles north-west, depend on their ventilation; if you manage a surgery, clinic or care home near Didcot, yours matters too.
Comparing quotes
- Whether the work can be done while the site is closed
- What paperwork you get at the end
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- What insurance they carry
Common questions in Didcot
Do you clean school ventilation in Didcot in the holidays?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 5 schools and colleges with food registrations within roughly a mile and a half of Didcot. Send us your term dates when you call us on 0345 646 2711, or email photos, and we will fit the work in.
Is AHU cleaning available in Didcot?
Yes, Didcot is covered. A fixed quote usually follows within one working day of the survey details.
How do you keep the site clean during the work?
By covering it before any work starts. The work is kept contained and leave the area clean.
Is there a report after cleaning?
Yes, both a certificate and a report with photos. It includes a recommended date for the next check.
Do you survey before quoting?
Yes. For many sites, pictures and a few details are enough, while bigger or harder-to-see systems are surveyed on site.
Does the AHU have to be shut down for cleaning?
Yes. We cannot clean a running unit, so it’s switched off and made safe first. We agree the timing with your site team.
Can you set up regular visits?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, to suit the system and how it’s used.
What happens to the waste?
We take it away at the end of the visit. While we work, it’s kept contained to keep the area clean.
Looking after it afterwards
Once we have finished, these simple steps help:
- Keep filter changes on time and recorded
- Look at the condensate drain whenever the unit is serviced
- Watch for drips or damp patches near the plant
- Diary the inspection date recommended in the report
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can quote for both.
Change or clean filters on time. Once filters clog, dirt starts getting past them.