Oxfordshire · Air handling unit cleaning
Air handling unit cleaning in Charlton-on-Otmoor, Oxfordshire
AHU cleaning for Charlton-on-Otmoor, from a team that has been trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Air handling units due a clean after building work
- Plant that has been serviced but not cleaned
- Condensate trays that will not empty
The process
Night work is normal for us. Evenings, nights and weekends are when much of our work happens, so a kitchen or building can carry on as usual the next day. The visit itself takes a single shift for a typical unit, longer for large or heavily soiled ones. Photos of the system and how to reach it help us plan a visit to Charlton-on-Otmoor.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Clear loose items from the work area
- Agree a time when the area can be out of use
- Allow time for equipment near the work to be turned off and cool down
Ask for a quote
Need a price for AHU cleaning? Please phone us on 0345 646 2711, or email photos and tell us about the site. We will explain what we’d do and send a fixed quote before anything is booked.
Related advice
AHU cleaning in Charlton-on-Otmoor
Our AHU cleans for sites in Charlton-on-Otmoor cover the parts that collect dirt: the filter section, heating and cooling coils, drain trays, fan and casing. Every clean comes with a TR19® certificate and before and after pictures in a report. The work covers internal panels, dampers and louvres and heating and cooling coils, and people most often call us about plant that needs cleaning after a refit and dirty coils holding back the airflow.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
Duct Doctor has been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we are fully insured.
- Place
- Charlton-on-Otmoor (OX5)
- Wider area
- Oxfordshire
- Paperwork
- Report and pictures after the visit
- Quote
- A fixed quote up front
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
Aftercare tips
Good habits slow the build-up between visits. Our tips:
- Check the drain tray is emptying during routine visits
- Clear leaves and litter away from the intake
- Plan the next inspection before the last report gets filed away
- Flag stale or damp smells in the supply air
You receive a TR19® certificate and a photo report after the clean. Keep both with the building’s maintenance records.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
Do you need AHU cleaning in Charlton-on-Otmoor?
No filter stops everything. The fine dust that passes the filters lands on the coils, the fan and the internal panels, a little more each month.
Any of these means the system needs a check-up:
- Odours coming through the supply air
- Leaves and litter drawn into the unit
- Dust built up on fan impellers
- Air handling units with blocked filters
School buildings such as Charlton-on-Otmoor Church of England Primary School are usually done in the holidays, so classrooms aren’t disturbed.
Comparing quotes
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether the figure could change on the day
- What records you’ll receive afterwards
- Proof of insurance
Common questions in Charlton-on-Otmoor
Can you come to Charlton-on-Otmoor after we close?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Just ring 0345 646 2711 or email us with your opening times and we’ll plan around them.
Do you cover Charlton-on-Otmoor for AHU cleaning?
Yes, Charlton-on-Otmoor is within the area we cover across London and the South East. You can ring 0345 646 2711 or drop us a line and let us know what needs doing.
What do you clean inside the unit?
All the internal parts the air touches, from the intake and filters through the coils and fan to the outlet. The photo report shows each section before and after.
How do you protect the area?
We start with protection: floor sheeting and covers over nearby surfaces and equipment. The area is left tidy, with our waste taken away.
Do you do ventilation duct cleaning too?
Yes. Ventilation ductwork cleaning to TR19® Air is part of what we do. It’s often worth doing both at once, and we can quote for both.
What information do you need?
Where the site is, what it is and when it’s open, along with a few photos and any previous report.
What about areas you cannot get to?
They’re marked on the report. Often the fix is extra access, such as new panels in ductwork, which we can install.
Are you insured?
Yes. We carry full insurance and have been trading since 2009.
What your team can do, and what needs us
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, which is where we come in.
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but the parts you can’t see still need a specialist at the right interval.
Honest limits
A few issues sit outside what this work can do:
- The supply and extract ducts, quoted separately
- A system that is undersized for the building
- Controls and BMS settings that run the unit
If in doubt, phone us on 0345 646 2711, or email photos and we will say what we think.
Where we work
- Internal panels
- Dampers and louvres
- Filter sections
- Supply and extract fans
- Drain trays
- Heating and cooling coils
Multi-site and managed buildings
When the building owner and the occupier are different, the lease normally sets out who maintains what. We can quote either party, and the report can go to both.
Facilities teams in offices, schools and healthcare sites book us too in Charlton-on-Otmoor and across Oxfordshire. Work can be phased by floor, building or site to keep disruption down.
Places near Charlton-on-Otmoor
More services for Charlton-on-Otmoor
Ventilation in Charlton-on-Otmoor buildings
We cover Charlton-on-Otmoor, about 52 miles from central London, as part of our work across London and the South East. The visit is fixed around your opening hours, not ours. Charlton-on-Otmoor’s nearest hospital, Bicester Community Hospital, is about 4.2 miles north. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Healthcare ventilation, from large hospitals like Bicester Community Hospital (about 4.2 miles north) to small clinics, depends on clean filters, coils and ducts.
Charlton-on-Otmoor is about 5 miles south of Bicester, in Oxfordshire. We carry out AHU cleaning for commercial premises of every kind in Charlton-on-Otmoor and the rest of Oxfordshire. Across Oxfordshire, we cover 443 places, and Charlton-on-Otmoor is one of them. For sites nearby, see our Oxford page, about 6 miles away.
Work in OX5 follows the same survey, fixed quote and written report as everywhere else we cover. That includes premises on High Street, Blacksmiths Lane and Church Lane and the roads around them. If your site is just outside Charlton-on-Otmoor, we cover Fencott (1 mile east), Murcott (1 mile east), Merton (1 mile north-east), Wendlebury (2 miles north) and Horton-cum-Studley (3 miles south-east). Larger places within reach include Oxford (6 miles south), Bicester (5 miles north), Abingdon-on-Thames (12 miles south), Witney (13 miles west), Thame (11 miles south-east) and Kidlington (4 miles west).
Near you in Charlton-on-Otmoor
Typical jobs here are in premises near The Crown pub, among other places. The nearest railway station is Islip station, roughly 2.3 miles west. A little further out are Bicester Community Hospital (4.2 miles north) and Bicester Avenue (3.6 miles north). Not far away are Graven Hill and Otmoor RSPB reserve.
Leave it or put it right?
A slimy drain tray only gets worse. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Dealing with it early keeps the clean straightforward. In a small place like Charlton-on-Otmoor, a system that fails can take a site out of use.
We don’t list prices on the website, because the cost depends on the site in front of us. Call for a fixed quote, and we’ll talk you through it.
Why Charlton-on-Otmoor businesses choose us
- Fixed quotes, typically within one working day
- Accredited under CHAS and SafeContractor, with ISO 9001
- Fully insured
- We diagnose before we treat
Read how cleaning jobs are priced or how to check a contractor.