Oxfordshire · Air handling unit cleaning
Air handling unit cleaning in Postcombe, Oxfordshire
AHU cleaning for Postcombe, from a team that has been trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Air handling units due a clean after building work
- Units that have only ever had filter changes
- Odours coming through the supply air
What we’re called out for in Postcombe
Air handling units are typically tucked away on roofs, in plant rooms or above ceilings and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
The symptoms we are asked about most are:
- Plant that needs cleaning after a refit
- Filters that are clogged or overdue
- Stale or musty smells from the ventilation
- Fan sections that haven’t been cleaned in years
In Postcombe, we look inside the system before deciding what needs cleaning.
Comparing quotes
- How VAT is shown on the quote
- How they set the interval to the next visit
- If they look at the system before pricing
- What hours they’ll be on site
AHU cleaning for kitchens and businesses in Postcombe
Our AHU cleaning covers sites in Postcombe and the rest of Oxfordshire, in buildings such as offices, schools, healthcare sites and shops. The work is timed around when the system can be switched off, including evenings, nights and weekends. The work covers drain trays, internal panels and supply and extract fans, and common reasons people get in touch are drain trays holding standing water and odours coming through the supply air.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
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 carry full insurance.
- Where
- Postcombe (OX9)
- Region
- Oxfordshire
- Paperwork
- Photo report after each visit
- Price
- Fixed quote, typically within a working day
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Part by part
Fans and fan sections
The fan moves all of the unit’s air, so dirt on it gets spread around. We clean the impeller, housing and surrounding section.
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. A clean gets air moving through the coil properly again.
Keeping the system healthy
To keep the system working properly between visits:
- Make sure condensate is draining away
- Keep the area around the fresh air intake clear
- Note any water around the unit or leaks below it
- Make sure the unit’s access doors open easily
Restart the unit with your site team or maintenance contractor once we have finished. Check the drain tray is emptying over the first few days to confirm water is draining away.
Make the drain tray part of every maintenance visit. Catching a slow drain early stops standing water building up.
AHU cleaning in Postcombe: local notes
About 40 miles out from central London, Postcombe is part of the South East area we work across. A survey and a fixed quote come first, then the visit at a time that suits you. The nearest hospital to Postcombe is Thame Community Hospital, about 3.8 miles north. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Thame Community Hospital, about 3.8 miles north, is the nearest hospital to Postcombe, and healthcare sites of every size need their supply air kept clean.
Postcombe is about 4 miles south of Thame, in Oxfordshire. Across the OX9 area, we can take on AHU cleaning. Across Oxfordshire, we cover 443 places, Postcombe among them. For sites nearby, see our Oxford page (12 miles or so).
All of OX9 is covered for AHU cleaning, from the main roads to the quietest streets. Whether your site is on London Road, Salt Lane and Beech Farm Close or a nearby road, we can help. If your site is just outside Postcombe, we cover South Weston (1 mile south-west), Aston Rowant (1 mile east), Lewknor (1 mile south), Kingston Blount (2 miles east) and Crowell (2 miles east). Larger places within reach include Oxford (12 miles west), Didcot (13 miles south-west), Abingdon-on-Thames (13 miles west), Thame (4 miles north), Henley-on-Thames (11 miles south) and Benson (7 miles south-west).
Around Postcombe
Around Postcombe, our work takes us to kitchens and buildings near England's Rose pub. A little further out are Thame Community Hospital (3.8 miles north). Green spaces nearby include Aston Rowant NNR and Bald Hill.
Landlords, agents and facilities managers
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements and we will come back with a fixed quote.
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. 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.
How it works
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool first, and floors and nearby surfaces are sheeted. On site, it takes half a day to a full day per unit, with large plant planned over several shifts. Photos of the system and how to reach it help us plan a visit to Postcombe.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- 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
- Find the previous report, if there is one
- Allow time for equipment near the work to be turned off and cool down
- Clear loose items from the work area
Ask for a quote
There’s no standard price list, because every site is different. We look at your system first, from photos or on a visit, then send a fixed quote. To start, phone us on 0345 646 2711, or email photos.
Related advice
What AHU cleaning cannot fix
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It will not put right:
- Ventilation that was badly designed in the first place
- Breakdowns that need a mechanical engineer
- Leaking heating or cooling coils
If in doubt, ring 0345 646 2711, or email photos and we’ll say what we think before booking.
Where we work
- Drain trays
- Filter sections
- Heating and cooling coils
- Dampers and louvres
- Internal panels
- Supply and extract fans
Why it’s worth doing now in Postcombe
Leave an AHU uncleaned and the dirt doesn’t stay put. It moves on into the ductwork and out into the rooms, which is why the unit and the ducts are best cleaned together. In a small place like Postcombe, a system that fails can take a site out of use.
What you pay depends on the size of the system, what state it’s in and access to every part of it. You get a fixed price before work begins, so you know where you stand.
Why choose Duct Doctor in Postcombe
- Evenings, overnight and weekends, plus 24/7 emergency callout
- We diagnose before we treat
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Ventilation hygiene specialists since 2009
See what affects the cost and our accreditations and certificates.
FAQs for Postcombe
Can you come to Postcombe after we close?
Yes, out-of-hours work is a big part of what we do. Your customers, staff or residents in Postcombe needn’t be disturbed. Your opening times are the first thing we ask for.
Do you cover smaller places like Postcombe?
Yes. Villages and rural sites across the South East are part of our work, Postcombe included. The journey is planned ahead, so a few details about the route help.
How far ahead should we book?
That depends on the slot you want and the size of the job. Tell us your preferred dates when you ask for a quote, and for anything urgent, ring our 24/7 emergency line.
Can we book visits on a schedule?
Yes, of course. Send details of the systems and how they’re used and we’ll propose a schedule with a fixed quote.
Which accreditations do you hold?
Duct Doctor is 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.
Do you have insurance?
Yes. We’re fully insured, and the details are available on request.
What’s included in an AHU clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. The survey confirms what’s in your unit before we quote.
How do you protect the area?
Floors and surfaces near the work are sheeted before any work starts, and anything we remove is contained. Before we leave, we tidy up and clean down.