Oxfordshire · Air handling unit cleaning
AHU Cleaning in Cassington
AHU cleaning across Cassington and nearby, timed so the site keeps working and finished with a written report and pictures.
- Dust built up on fan impellers
- Plant that needs cleaning after a refit
- Rooms that smell stuffy when the system runs
How we handle AHU cleaning in Cassington
If the units serving a building in Cassington 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, internal panels and supply and extract fans, and people most often call us about air handling units never cleaned inside and dirty fans and fan housings.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
Nothing is signed off by word of mouth: a written report, dated and illustrated with pictures, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Location
- Cassington (OX29)
- Wider area
- Oxfordshire
- Records
- Photo report after each visit
- Quotes
- A fixed quote up front
- Hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Updated
- 30 October 2026
Landlords, agents and facilities managers
Whether it’s one building or many, you get the same standard: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
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’re happy to quote for all of it.
Leave it or put it right?
Dirty coils and fans make the unit strain to move the same air. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. Systems in rural buildings are often out of sight and out of mind.
One small site or a whole estate, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before work begins.
Why us?
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- Work around your opening hours, with 24/7 emergency cover
- Fully insured
- Photo reports with every job
Cassington: your questions answered
Do you cover smaller places like Cassington?
Yes, Cassington is part of our area, however small the site. Let us know about access, parking and anything unusual about getting there when you book.
Can the work in Cassington be done at night or at weekends?
Yes, out-of-hours work is a big part of what we do. The work in Cassington can fit around your hours. Just ring 0345 646 2711, or send details by email with your opening times and we will plan around them.
Do you offer maintenance contracts?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, depending on what the system needs.
Do you offer emergency callouts?
Yes, any time. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line and we will talk you through the next steps.
Can you fix a faulty AHU?
We clean the unit and flag faults rather than repair them, with photos where it helps.
Which sectors do you work in?
Commercial premises of every kind: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. We fit the work around how the site operates.
What do you do to protect the area?
With sheeting and covers, before anything else happens. The work is kept contained and clean down when we finish.
What do you need from me for a quote?
Where the site is, what it is and when it’s open, along with a few photos and any previous report.
How the job changes from site to site
Fans and fan sections
Dust on a fan impeller adds weight and wear. A clean fan runs more smoothly.
Rooftop and plant room units
Units outside are exposed to weather and windblown debris. The intake section gets particular attention.
Towns and villages near Cassington
What else we do in Cassington
What we are called out for in Cassington
Filters catch most of the dust, but not all of it. What gets through settles on coils, fans and the inside of the casing, building up layer by layer.
These are the problems we see most often:
- Dust built up on fan impellers
- Dirty coils holding back the airflow
- Stale or musty smells from the ventilation
- Plant that has been serviced but not cleaned
School buildings such as St Peter's Church of England Primary School are usually done in the holidays, so classrooms aren’t disturbed.
Questions to ask before you book
- What records you’ll receive afterwards
- Whether the price is fixed
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- If they look at the system before pricing
What staff can safely do
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, they should report it rather than try to fix it. We can diagnose it and quote.
How the visit works
Night work is normal for us. A lot of visits happen overnight or at weekends, so a kitchen or building can carry on as usual the next day. On site, the work takes from a few hours for a compact unit to a day or more for a large one. Somewhere as small as Cassington, the date and timings are agreed with you well before the day.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
Before we arrive
- Let us know about permits to work or site inductions
- Let us know when the site is closed or quiet
- Clear loose items from the work area
Getting a quote
The quickest way to a quote is to send pictures: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and many jobs can be priced from that alone.
Related advice
Ventilation in Cassington buildings
Going by the FSA’s register, there are about 3 schools, colleges and universities and about 3 hospitals, care homes and childcare premises serving food within 1.5 miles or so of the middle of Cassington. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. We cover Cassington, about 57 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. Radcliffe Infirmary is the nearest hospital, about 4.1 miles south-east of Cassington. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Radcliffe Infirmary, about 4.1 miles south-east, is the nearest hospital to Cassington, and healthcare sites of every size need their supply air kept clean.
Cassington is about 6 miles north-west of Oxford, in Oxfordshire. From the centre of Cassington to the outskirts, AHU cleaning is available to all kinds of commercial premises, from small sites to large estates. We cover 443 places across Oxfordshire, large and small. For sites nearby, see our Oxford page (6 miles or so).
AHU cleaning in OX29 is surveyed, quoted and booked the same way as anywhere else. If you need AHU cleaning at premises on Church Lane, The Green and Pound Lane or anywhere close by, our technicians can take on the work. Other places close to Cassington include Swinford (1 mile south-west), Eynsham (2 miles south-west), Wytham (2 miles south-east), Farmoor (2 miles south) and Filchampstead (3 miles south). Further out, we also cover Oxford (6 miles south-east), Didcot (13 miles south), Bicester (11 miles north-east), Abingdon-on-Thames (8 miles south), Witney (6 miles west) and Carterton (11 miles west).
What’s near Cassington
Typical jobs here are in premises near Bartholomew School and Chequers Inn and the streets around them. The closest station to Cassington is Hanborough station, about 2.5 miles north-west of the centre. Well-known places in the area include Oxford Castle and earlier settlement remains (4.5 miles south-east) and Radcliffe Infirmary (4.1 miles south-east). The countryside around Cassington includes Hook Meadow and The Trap Grounds and Cumnor Hill.
What AHU cleaning can’t fix
We’ll always give you a straight diagnosis, so here’s what this work can’t put right:
- Mechanical faults with motors, belts or bearings
- The supply and extract ducts, quoted separately
- Damaged coils beyond cleaning
If you’re not sure, just ring 0345 646 2711, or send details by email and we will give you a straight answer before booking.
What we work on in Cassington
- Drain trays
- Heating and cooling coils
- Internal panels
- Filter sections
- Dampers and louvres
- Supply and extract fans