Oxfordshire · Air handling unit cleaning
Blenheim AHU cleaning
AHU cleaning for commercial sites in Blenheim and across Oxfordshire. CHAS, SafeContractor and ISO 9001, and fully insured.
- Leaves and litter drawn into the unit
- Condensate trays that will not empty
- Filters that are clogged or overdue
AHU cleaning in Blenheim, done properly
The fan pushes every bit of air in the system, so dust on its blades and housing ends up in the airstream. We clean the fan section along with the rest of the unit, once the unit has been shut down and isolated. The work covers drain trays, internal panels and dampers and louvres, and people most often call us about debris and leaves in the fresh air intake and drain trays holding standing water.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
Each visit ends with a written report and photos, so there’s a dated record of the work. Kitchen extract cleaning to TR19® Grease is certificated through the BESCA Vent Hygiene Elite portal.
- Where
- Blenheim (OX44)
- Region
- Oxfordshire
- Records
- Photo report after every visit
- Quote
- Fixed quote, usually within a working day
- Working hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
Managing agents and facilities teams in Blenheim
Keeping records across a portfolio is half the battle. Each visit produces a dated report with pictures, ready to show insurers, fire officers or EHOs.
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.
The process
Our technicians bring everything the work needs, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. The visit takes one overnight shift for many single units, with bigger plant phased. If the van will struggle with a lane or gateway near Blenheim, let us know and we will plan around it.
- We agree a shutdown window that suits the building.
- We take before photos 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 pictures are taken and the certificate issued.
How to prepare
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Tell us about site rules, permits or sign-in
- Plan for cooking equipment or plant to be off before we arrive
How to get a quote
Quoting starts with a diagnosis, from your photos and details or, where that is not enough, a survey on site. After that, you get a fixed price for the work so you know the cost before we start.
Related advice
How the job changes from site to site
Heating and cooling coils
A dirty coil holds back the air and makes heating and cooling less effective. Cleaning restores the open path through the fins.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. We clean the intake and first stage of filters along with the rest.
Do you need AHU cleaning in Blenheim?
It matters for two reasons: air quality, since the unit feeds occupied rooms, and performance, since dirt makes it strain. For the people using the building every day, that’s the air they breathe for hours on end.
The symptoms we are asked about most are:
- Intake sections clogged with outdoor debris
- Rooms that smell stuffy when the system runs
- Dirty fans and fan housings
- Condensate trays that will not empty
Hospitals such as NHS Oxfordshire Clinical Commissioning Group (about 2.3 miles west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Blenheim are no different.
What your quote should include
- Proof of accreditation you can verify
- How VAT is shown on the quote
- What paperwork you get at the end
- How areas they can’t reach will be recorded
Keeping the system healthy
How long the results last depends on use and care. Here’s what we suggest:
- Diary the inspection date recommended in the report
- Keep filter changes on time and recorded
- Do not ignore odours coming through the grilles
- Store the TR19 paperwork where auditors can find it
Photos in the report cover the filters, coils, drain tray, fan and casing, and note any part we couldn’t get to. It also notes faults we spotted, such as damaged panels or a blocked drain.
Change or clean filters on time. Once filters clog, dirt starts getting past them.
Places near Blenheim
What else we do in Blenheim
Blenheim buildings and their air
Blenheim, about 48 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours. For Blenheim, the closest hospital is NHS Oxfordshire Clinical Commissioning Group, roughly 2.3 miles west. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
For schools like Garsington Church of England Primary School, the holidays are the usual time to inspect and clean ventilation.
Blenheim is about 4 miles south-east of Oxford, in Oxfordshire. Anywhere in OX44, we cover AHU cleaning for commercial sites. 443 places in Oxfordshire are on our list, large and small.
We cover every part of OX44 for AHU cleaning and the streets around it. Whether your site is on Wheatley Road and North Manor or a nearby road, we can help. We also cover the places around Blenheim: Garsington (1 mile west), Denton (1 mile east), Cuddesdon (1 mile east), Horspath (1 mile north-west) and Littleworth (2 miles north). Further out, we also cover Oxford (4 miles north-west), Didcot (9 miles south-west), Bicester (13 miles north), Abingdon-on-Thames (6 miles south-west), Witney (15 miles west) and Thame (8 miles east).
What’s near Blenheim
Locally, jobs take us to businesses close to Red Lion pub, Wheatley Park School and Library Farmhouse and the streets around them. Blenheim’s nearest station is Radley station, roughly 4.3 miles south-west. Nearby you will also find British Tattoo History Museum (3.2 miles north-west) and Oxford Castle (5 miles north-west). Green spaces nearby include Wells Farm and Shotover.
FAQs for Blenheim
Do you work overnight in Blenheim?
Yes, we can come after you close and finish before you open. The site is handed back ready to open. When you call 0345 646 2711 or send us an email, mention when the site is quiet.
Can you do AHU cleaning in Blenheim?
Yes. We work across London and the South East, and Blenheim is part of that. Just ring 0345 646 2711 or drop us a line with a few details of the site.
Which parts of an air handling unit do you clean?
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.
Which accreditations do you hold?
We hold CHAS, SafeContractor and ISO 9001, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Do you have a 24/7 line?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we will talk you through the next steps.
What should I send you?
A short description and a few photos plus the address and your hours. We will ask for anything else we need.
Do you clean the ductwork as well?
Yes. Ductwork is cleaned through access panels, and any sections we can’t reach are noted in the report, and new panels can be fitted.
How long does it take to clean an air handling unit?
Cleaning takes one overnight shift for many single units, with bigger plant phased. Bigger units can be phased, and you can give us a ring on 0345 646 2711, or send details by email to plan it.
Why deal with it now?
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. It’s worth booking a check, because nobody sees inside a duct day to day.
Whatever the type of site, the quote works the same way: the size of the job, access, condition and working hours. Ask for a fixed quote and we’ll explain each part.
What you get with us
- Evenings, overnight and weekends, plus 24/7 emergency callout
- CHAS, SafeContractor and ISO 9001
- A single point of contact for sites across the South East and London
- Trading since 2009
Take a look at what affects the cost or how to check a contractor.
What a clean will not put right
It’s worth knowing the limits before booking:
- Building management system faults
- Mechanical faults with motors, belts or bearings
- Ventilation that was badly designed in the first place
Not sure which it is? You can call 0345 646 2711 or use the quote form and we’ll tell you honestly before you book.
What we work on in Blenheim
- Internal panels
- Drain trays
- Supply and extract fans
- Heating and cooling coils
- Dampers and louvres
- Filter sections