Oxfordshire · Air handling unit cleaning
Marston AHU cleaning
AHU cleaning in Marston, surveyed first and signed off with a written report and pictures. Ask us for a fixed quote.
- Odours coming through the supply air
- Blocked condensate drains and slimy trays
- Intake sections clogged with outdoor debris
Keeping the system healthy
Simple habits between visits make a real difference. Our advice:
- Note any water around the unit or leaks below it
- Check the drain tray is emptying during routine visits
- Flag stale or damp smells in the supply air
- Store the TR19 paperwork where auditors can find it
Once the clean is done, we send a TR19® certificate and a report with before and after pictures. They belong in the plant or maintenance log.
Make the drain tray part of every maintenance visit. A drain that’s cleared early never gets to the slime stage.
How we handle AHU cleaning in Marston
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. The work covers supply and extract fans, dampers and louvres and internal panels, and people most often call us about condensate trays that won’t empty and dirty fans and fan housings.
Work in a small place like Marston starts with agreeing access and timings.
The sign-off is always in writing: a written report, dated and illustrated with photos, 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
- Marston (OX3, OX2)
- Region
- Oxfordshire
- Paperwork
- Photo report after each visit
- Quotes
- A fixed quote up front
- Working hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Why deal with it now?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. A TR19® certificate and photo report give you that, ready to show anyone who asks. Our emergency line runs 24/7, but a planned visit to Marston is calmer for everyone.
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. The price is fixed before we start.
Why Marston businesses choose us
- CHAS and SafeContractor accredited, with ISO 9001
- A fixed price before any work starts
- Work around your opening hours, with 24/7 emergency cover
- We diagnose before we treat
Take a look at what affects the cost and how to check a contractor.
Also near Marston
More services for Marston
Different parts, different methods
Filters
What’s on the filters is a good clue to what’s further in. They’re photographed before and after for your records.
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. They’re cleaned using methods that won’t bend or flatten the fins.
What a clean will not put right
To be straight with you, some problems need a different fix:
- Problems with the unit’s controls or sensors
- Mechanical faults with motors, belts or bearings
- Airflow problems caused by the system’s design
If in doubt, give us a ring on 0345 646 2711 or email us and we’ll say what we think.
Where we work
- Heating and cooling coils
- Internal panels
- Supply and extract fans
- Dampers and louvres
- Drain trays
- Filter sections
Common problems we fix in Marston
No filter stops everything. The fine dust that passes the filters lands on the coils, the fan and the internal panels, building up layer by layer.
Most sites get in touch when they notice one of these:
- Air handling units with blocked filters
- Dust built up on fan impellers
- Rooms that smell stuffy when the system runs
- Leaves and litter drawn into the unit
Healthcare buildings such as Churchill Hospital, about 1.2 miles south-east, depend on their ventilation; if you manage a surgery, clinic or care home near Marston, yours matters too.
Before you book anyone
- Whether the work can be done while the site is closed
- Proof of accreditation you can verify
- Whether a survey comes first
- How VAT is shown on the quote
What affects the quote in Marston
Your quote is based on your site. We take into account:
- Working hours and out-of-hours timing
- How many systems or sites are involved
- The scale of the work
- Where the site is and how we reach it
What you pay depends on how big the system is, the condition it’s in and access to every part of it. You get a fixed price before we start, so there are no surprises.
Helping us quote
Photos let us diagnose from a distance. The most useful are:
- How we’d reach plant on a roof or in a plant room
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- Any previous report or certificate
- Your opening hours and when the area is out of use
For a fixed quote, give us a ring on 0345 646 2711 or send us an email with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. We usually come back within one working day.
How it works
There’s very little for your team to do on the day. A contact on site lets us in at the agreed time and points us to the system, and the rest is down to us. Afterwards, the area is left tidy and the written report follows. If you can send photos, we can arrive in Marston knowing what to expect.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures 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.
- We take after photos and issue the certificate and report.
Getting ready for the visit
- Dig out any earlier paperwork for the system
- Make sure equipment near the work can be switched off and left to cool
- Let us know when the site is closed or quiet
How to get a quote
We don’t publish a price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, and then send you a fixed quote. To get going, call us on 0345 646 2711 or send us an email.
Advice
AHU cleaning around Marston
Going by the FSA’s register, there are about 30 schools, colleges and universities, about 22 care, childcare and hospital premises and about 8 hotels and B&Bs serving food across Marston and its immediate surroundings (about a mile and a half). Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. At about 53 miles from central London, Marston sits well inside the area we cover. The visit is fixed around your opening hours, not ours. Churchill Hospital is the nearest hospital, about 1.2 miles south-east of Marston. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Classrooms and halls at schools such as St Nicholas Primary School are easiest to work in when pupils are away.
Marston is about 2 miles north of Oxford, in Oxfordshire. Marston gets the same approach as every site we work on: a survey first, a fixed quote, work timed around your hours and a report with pictures. 443 places in Oxfordshire are on our list, from busy centres to quieter spots.
AHU cleaning in OX3 and OX2 is surveyed, quoted and booked the same way as anywhere else. AHU cleaning is available to premises on Back Lane, Mill Lane and Butts Lane and the roads around them. If your site is just outside Marston, we cover Northway (1 mile south-east), New Marston (1 mile south), Norham Manor (1 mile south-west), Summertown (1 mile west) and North Oxford (1 mile west). Within a short drive, we also cover Didcot (12 miles south), Bicester (9 miles north), Abingdon-on-Thames (7 miles south), Witney (11 miles west), Carterton (15 miles west) and Thame (12 miles east).
What’s near Marston
We work in commercial kitchens and buildings around Oxford University Parks, Oxford Academy and Swan School and the streets around them. You will also find Victoria Arms (0.5 miles west) and St Hugh's College Main Building Including Library (1.3 miles south-west). The closest station to Marston is Oxford station, roughly 2.2 miles south-west of the centre. Other landmarks nearby include Pitt Rivers Museum (1.5 miles south-west) and Oxford Castle (2.1 miles south-west). For a walk, there’s Headington Hill and Hook Meadow and The Trap Grounds.
Marston questions
Can ventilation in schools around Marston be cleaned out of term?
Yes, and it’s the easiest time to do it. The FSA’s register shows about 30 schools and colleges with food registrations within roughly a mile and a half of Marston. Send us your term dates when you ring 0345 646 2711, or email photos, and we will fit the work in.
Can you work in Marston outside opening hours?
Yes, we can come after you close and finish before you open. It means the site in Marston keeps running as normal. Let us know the hours you are closed and we’ll book within them.
How much does AHU cleaning cost?
There’s no set price, as it depends on the job: how big it is, what state it’s in, how we reach it and the working hours. You get a fixed price before any work starts.
What information do you need?
The site address, the type of premises and your opening hours, plus pictures of the system and your last certificate or report if you have one.
Which kinds of sites do you work on?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, as well as food production and leisure sites.
Are you fully insured?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
When should our AHU next be cleaned?
Inspection under TR19® Air decides it. Units in heavy use or in sensitive buildings may need attention more often.
Do you need to switch the unit off?
Yes. We can’t clean a running unit, so it’s switched off and made safe first. We agree the timing with your site team.