Oxfordshire · Air handling unit cleaning
Air handling unit cleaning in North Leigh, Oxfordshire
AHU cleaning across North Leigh and nearby, timed so the site keeps working and signed off in writing with pictures.
- Dust-coated heating and cooling coils
- Plant that has been serviced but not cleaned
- Units needing a clean before a new tenant or handover
When something else is needed
AHU cleaning cannot fix everything, and we’ll tell you before any work starts. It won’t put right:
- Problems with the unit’s controls or sensors
- Ventilation that was badly designed in the first place
- Ductwork downstream of the unit, which is a separate clean
If in doubt, ring 0345 646 2711, or email photos and we will say what we think.
What the work covers
- Filter sections
- Internal panels
- Drain trays
- Heating and cooling coils
- Dampers and louvres
- Supply and extract fans
AHU cleaning for kitchens and businesses in North Leigh
Think of an AHU clean as a full check-up for the ventilation. Every section is opened, cleaned and photographed, so the report shows exactly what was done. The work covers internal panels, supply and extract fans and filter sections, and people most often call us about fan sections that haven’t been cleaned in years and debris and leaves in the fresh air intake.
In a village or hamlet like North Leigh, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
The report is your system’s health record: a dated account with photos of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal, ready for your insurer.
- Place
- North Leigh (OX29)
- Region
- Oxfordshire
- Records
- Report and pictures after the visit
- Price
- Fixed quote, normally within a working day
- Hours
- After hours by arrangement; emergencies any time
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
North Leigh questions
Do you cover smaller places like North Leigh?
Yes. Villages and rural sites across the South East are part of our work, North Leigh included. Let us know about access, parking and anything unusual about getting there when you book.
Can a school’s ventilation in North Leigh be done out of term time?
Yes. The holidays are the usual time for school work. With about 3 schools and colleges on the FSA’s register within roughly a mile and a half of North Leigh, it pays to plan holiday dates ahead. Tell us your holiday dates and we’ll book the visit for when the site is empty.
How often should an air handling unit be cleaned?
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.
Do you give a certificate after the clean?
Yes, a TR19® certificate and a photo report. The report also suggests when the unit should next be inspected.
What’s included in an AHU clean?
Every section that collects dirt: filters, coils, tray, fan and panels. The survey confirms what’s in your unit before we quote.
Can you set up regular visits?
Yes, of course. Send details of the systems and how they’re used and we’ll propose a schedule with a fixed quote.
Where does the waste go?
We take it away when we go. During the work, it’s contained so the area stays clean.
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.
What AHU cleaning looks like in North Leigh
There are about 3 schools, colleges and universities and about 3 hospitals, care homes and childcare premises on the FSA’s food hygiene register across North Leigh and its immediate surroundings (about a mile and a half). Buildings like these often rely on mechanical ventilation, which TR19® Air covers.
School buildings such as North Leigh Church of England (Controlled) School are typically done in the holidays, so classrooms aren’t disturbed.
North Leigh is about 3 miles north-east of Witney, in Oxfordshire. For AHU cleaning in and around North Leigh, please call us on 0345 646 2711 or email us for a fixed quote. We work across South East England and London, including North Leigh. 443 places in Oxfordshire are on our list, large and small. Our Oxford page covers sites nearby, about 10 miles away.
Here we cover the OX29 postcode area for AHU cleaning. AHU cleaning is available to premises on Church Road, Cuckamus Lane and Windmill Heights and nearby roads. If your site is just outside North Leigh, we cover New Yatt (1 mile west), East End (1 mile north-east), Freeland (2 miles east), Poffley End (2 miles west) and Delly End (2 miles west). Within a short drive, we also cover Oxford (10 miles south-east), Bicester (14 miles north-east), Abingdon-on-Thames (12 miles south-east), Witney (3 miles south-west), Carterton (7 miles south-west) and Wantage (15 miles south).
What’s near North Leigh
In North Leigh, that means kitchens and buildings near The Masons Arms Public House and Wood Green School, among other places. For rail, the closest station is Combe station, about 2.4 miles north-east of the centre. Well-known places in the area include Cogges Manor Farm Museum (2.5 miles south-west). The countryside around North Leigh includes Blenheim Farm.
What we’re called out for in North Leigh
Whatever surrounds a building in North Leigh, the air drawn into its AHU carries dust, pollen and debris. The intake section and first filters take the brunt, and some travels further into the unit.
What we are most often called out for:
- Intake sections clogged with outdoor debris
- Odours coming through the supply air
- Air handling units with blocked filters
- Dust built up on fan impellers
Around North Leigh, as anywhere, ventilation cleaning begins with an inspection.
What your quote should include
- What hours they’ll be on site
- Whether the quote is based on a survey or photos
- What happens if part of the system cannot be accessed
- If the quote is a fixed price or an estimate
What else we do in North Leigh
Keeping the system healthy
So the system stays in good health:
- Report musty smells from the vents right away
- Note any water around the unit or leaks below it
- Diary the inspection date recommended in the report
- Keep the certificate and photo report with the plant records
We recommend when the unit should next be inspected or cleaned, based on what we found. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Make sure access doors and panels on the unit open easily. If a section is hard to get into, it tends not to get checked.
Why act early in North Leigh
A clogged coil or dirty fan makes the unit work harder for the same airflow. The result is extra wear and a building that doesn’t feel as comfortable, and a planned clean is far less disruptive than a breakdown. A planned visit to North Leigh is easier to arrange than an emergency callout.
What you pay reflects the actual work. That is why every job is surveyed first, and why the quote is fixed before we start.
Why choose Duct Doctor in North Leigh
- Ventilation hygiene specialists since 2009
- Accredited under CHAS and SafeContractor, with ISO 9001
- A fixed price before any work starts
- Full insurance on every job
Read how cleaning jobs are priced and how to check a contractor.
What staff can safely do
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings need training, the right equipment and safe access. Leave those to us.
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, alongside our reports.
What happens on the day
The first job on site is protection: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. The work on site takes a single shift for a typical unit, longer for large or heavily soiled ones, and we clear up before we go. Pictures of the system and its access let us plan the work in North Leigh before we set off.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters, coils, fan section and casing are cleaned in turn.
- We clean out the drain tray and make sure it drains.
- You get a TR19® certificate and a photo report.
How to prepare
- Mention any sign-in, permit or induction we need
- Agree a time when the area can be out of use
- Let us know how we reach the system, including roofs, risers and plant rooms
How to get a quote
Some systems can be priced from pictures; others need a survey. Big or complicated sites, and systems that are hard to see in pictures, get a survey first. Either way, the quote is fixed before any work is booked.
Advice
Different parts, different methods
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. We check them, and clean or change them as agreed in the quote, and the housing around them is cleaned too.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and note if the slope or the drain needs attention.