Oxfordshire · Air handling unit cleaning
Charlbury AHU cleaning
Professional AHU cleaning in and around Charlbury, timed so the site keeps working and signed off in writing with pictures.
- Blocked condensate drains and slimy trays
- Air handling units never cleaned inside
- Air handling units due a clean after building work
AHU cleaning for kitchens and businesses in Charlbury
Heating and cooling coils trap dust that gets past the filters. A coated coil restricts airflow and makes the unit work harder. Coils are cleaned carefully, with methods chosen so the fins are not flattened. The work covers internal panels, drain trays and filter sections, and common reasons people get in touch are filters that are clogged or overdue and rooms that smell stuffy when the system runs.
Smaller buildings around Charlbury often keep their ventilation units in a roof void or plant cupboard, where they’re easy to forget. Filters, coils and drain trays need attention whatever the size of the unit.
The sign-off is always in writing: a dated report with photos of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. Any parts we couldn’t reach are recorded on it too.
- Where
- Charlbury (OX7)
- Wider area
- Oxfordshire
- Paperwork
- Report and photos after the visit
- Quotes
- Fixed quote, normally within a working day
- Hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
For landlords and multi-site operators
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, which may be the employer, owner, landlord, FM or managing agent. With shared responsibility, good records help everyone.
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side and send the paperwork to whoever needs it.
Charlbury buildings and their air
Going by the FSA’s register, there are about 4 care, childcare and hospital premises serving food in and around Charlbury, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting.
If you run an office near Charlbury station, its supply ductwork can gather dust for years before anyone looks inside.
Charlbury is about 6 miles north of Witney, in Oxfordshire. We provide AHU cleaning for commercial premises of every kind in Charlbury and the rest of Oxfordshire. Our area takes in 443 places across Oxfordshire, large and small. Oxford is in our area too, around 13 miles away.
AHU cleaning in OX7 follows the same survey, fixed quote and written report as everywhere else we cover. You’ll find streets such as Market Street, Crawborough Road and Sandford Rise, and we cover them all for AHU cleaning. Charlbury sits on or near the B4022 and B4026, so getting to you is simple for evening and night visits. We also cover the places around Charlbury: Fawler (2 miles south-east), Spelsbury (2 miles north-west), Finstock (2 miles south), Stonesfield (2 miles south-east) and Ramsden (3 miles south). We also work in nearby towns such as Oxford (13 miles south-east), Banbury (14 miles north-east), Bicester (14 miles east), Witney (6 miles south), Carterton (9 miles south-west) and Kidlington (9 miles south-east).
What’s near Charlbury
Around Charlbury, our work takes us to kitchens and buildings near Ye Olde Three Horseshoes pub, among other places. For rail, the closest station is Charlbury station, about 0.5 miles west. Green spaces nearby include Blenheim Farm.
What the work involves, part by part
Fans and fan sections
The fan section is cleaned with the unit switched off and isolated with your site team.
Internal casing and panels
We open each section through its doors and close them securely when we’re done, and check every one is shut.
What affects the quote in Charlbury
The quote reflects the site in front of us. We consider:
- When the work can happen, such as evenings, overnight or weekends
- The condition we find in the survey
- The size of the system
- Site requirements such as sign-in and permits
Whatever the type of site, the quote works the same way: the size of the job, access, condition and working hours. Call for a fixed quote and we will explain each part.
Helping us quote
The more you tell us, the more accurate the quote. With your enquiry, please include:
- Any access panels or hatches you can see
- Wide photos of the system and the area around it
- Your last certificate, test record or report
- The times we could work without disrupting the site
Every quote begins with a look at the system, either from photos and details you send or from a site visit. Then we send a fixed price so you know the cost before we start.
Why deal with it now?
A clean unit feeds cleaner air into the ductwork, so the ducts and grilles stay cleaner between cleans. That makes the next inspection of a building in Charlbury simpler. Around Charlbury, a kitchen or building out of action is missed right away.
Every site is different, so we price each one individually. Size, access, the condition of the system and when we can work all play a part.
Why book with us
- One number for every site across the South East and London
- Each visit written up, with pictures
- CHAS, SafeContractor and ISO 9001
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
See our cost guide and our accreditations.
What happens on the day
Protection comes first: floors, worktops and anything near the work are covered. Then we make the system safe and start. The work on site takes half a day to a full day per unit, with large plant planned over several shifts, and the area is cleaned down before we leave. For a site near Charlbury, the work is booked around your opening hours, evenings and weekends included.
- 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.
How to prepare
- Clear the space around the work
- Dig out any earlier paperwork for the system
- Mention any sign-in, permit or induction we need
Ask for a quote
Want a quote for AHU cleaning? Please call 0345 646 2711 or drop us a line with a few details about the site. We will talk you through the work and give you a fixed quote before you commit to anything.
Read more
More services for Charlbury
Questions from Charlbury
Is Charlbury within the area you cover?
Yes, Charlbury is part of our area, however small the site. Photos of the system and directions to the site help us plan the visit.
Do you work at weekends in Charlbury?
Yes, out-of-hours work is a big part of what we do. It means the site in Charlbury keeps running as normal. Just phone us on 0345 646 2711 or drop us a line with your opening times and we will plan around them.
What’s TR19?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It sets out inspection, cleaning and record keeping, and it takes a risk-based approach.
Is there a report after cleaning?
Yes, both a certificate and a report with pictures. It includes a recommended date for the next check.
Do you offer emergency callouts?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we’ll talk you through the next steps.
What types of premises do you cover?
All kinds of commercial and public premises: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. Work is timed around how each site runs.
Which accreditations do you hold?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
How often do AHUs need cleaning?
TR19® Air takes a risk-based approach, so it depends on inspection rather than a fixed interval. We recommend a next date in each report.
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 need training, the right equipment and safe access. That is our job.
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
When to call us in Charlbury
Mechanical servicing keeps a unit running, but it doesn’t always include cleaning the inside. So a unit can be well maintained and still dirty.
Look out for any of the following:
- Air handling units never cleaned inside
- Drain trays holding standing water
- Leaves and litter drawn into the unit
- Units needing a clean before a new tenant or handover
For schools like Charlbury Primary School, the holidays are the usual time to inspect and clean ventilation.
Comparing quotes
- What happens if part of the system cannot be accessed
- If the quote is a fixed price or an estimate
- Whether they’re fully insured
- When the next visit should be, and why