Oxfordshire · Air handling unit cleaning
Cothill AHU cleaning
Need AHU cleaning in Cothill? We diagnose first, fix the price and book the work around your hours, then sign off with a report and pictures.
- Units that have only ever had filter changes
- Intake sections clogged with outdoor debris
- Dust-coated heating and cooling coils
AHU cleaning in Cothill
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. Typical jobs include rooms that smell stuffy when the system runs and debris and leaves in the fresh air intake, across internal panels, filter sections and supply and extract fans.
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.
It’s worth checking any contractor’s accreditations. We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Where
- Cothill (OX13)
- Region
- Oxfordshire
- Reporting
- Report and photos after the visit
- Quotes
- A fixed price before we start
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Fixed quotes for AHU cleaning in Cothill
There’s no set price list, because no two systems are the same. What we look at:
- A single visit or a regular plan
- Site requirements such as sign-in and permits
- How many systems or sites are involved
- How easy every part is to reach
What you pay depends on how big the system is, what state it’s in and how easy it is to reach. You get a fixed price before any work starts, so you know where you stand.
What we need to know
Many jobs can be priced from pictures and some basics. Send what you can of the following:
- A few general shots of the system
- Any access panels or hatches you can see
- The roof, plant room or outside wall the system runs to
- When the site is open and when it’s quiet
Quotes are quick. Send a few details and pictures, and we usually reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
More services for Cothill
Ventilation in Cothill buildings
Cothill is about 55 miles from central London, well within the area we cover across London and the South East. The visit is fixed around your opening hours, not ours. The nearest hospital to Cothill is Abingdon Community Hospital, about 2 miles south-east. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Healthcare buildings such as Abingdon Community Hospital, about 2 miles south-east, depend on their ventilation; if you manage a surgery, clinic or care home near Cothill, yours matters too.
Cothill is about 2 miles north-west of Abingdon-on-Thames, in Oxfordshire. Wherever you are in the OX13 postcode area, we can take on AHU cleaning. Cothill is one of 443 places in Oxfordshire we cover for AHU cleaning. For sites nearby, see our Oxford page, about 6 miles away.
We cover every part of the OX13 postcode area for AHU cleaning and the streets around it. If your site is just outside Cothill, we cover Dry Sandford (1 mile north-east), Shippon (1 mile south-east), Frilford Heath (1 mile south-west), Tubney (2 miles west) and Marcham (2 miles south). Further out, we also cover Oxford (6 miles north-east), Didcot (7 miles south-east), Witney (10 miles north-west), Carterton (12 miles north-west), Wantage (8 miles south-west) and Grove (7 miles south-west).
Near you in Cothill
Typical jobs here are in premises near Merry Miller pub and Larkmead School. For rail, the closest station is Radley station, roughly 3.9 miles east. Other landmarks nearby include Abingdon Community Hospital (2 miles south-east) and FitzHarris Castle (2.4 miles south-east). The countryside around Cothill includes Cumnor Hill and Dry Sandford Pit.
When to call us in Cothill
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. So a unit can be well maintained and still dirty.
These are the problems we see most often:
- Intake sections clogged with outdoor debris
- Coils clogged with dust and debris
- Plant that has been serviced but not cleaned
- Blocked condensate drains and slimy trays
School buildings such as Dry Sandford Primary School are usually done in the holidays, so classrooms aren’t disturbed.
Comparing quotes
- Exactly which parts of the system are covered
- Whether the price is fixed
- Which accreditations they hold, and whether you can check them
- How they set the interval to the next visit
What a clean will not put right
Before booking, it helps to know what’s not included:
- Airflow problems caused by the system’s design
- Faulty motors, drives or bearings
- Dirty ducts beyond the unit itself
Not sure which it is? You can phone us on 0345 646 2711, or send details by email and we will tell you honestly before you book.
Parts of the system we cover
- Drain trays
- Filter sections
- Heating and cooling coils
- Supply and extract fans
- Dampers and louvres
- Internal panels
What we do, step by step
A visit follows the same order every time: sheeting and protection first, make the system safe, carry out the AHU cleaning, clear away and hand over the paperwork. On site, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. Somewhere like Cothill, lanes, gates and parking are worth mentioning in advance.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
Preparing for the visit
- Mention any parking or loading restrictions
- Name a contact who can let us in at the agreed time
- Let us know when the site is closed or quiet
Ask for a quote
If you need AHU cleaning in Cothill, call us on 0345 646 2711 or drop us a line. Tell us what kind of premises it is and when it’s open, plus photos or the previous report if they’re to hand. We usually send a fixed quote within one working day.
Related advice
Staff cleaning versus specialist work
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they don’t reach the grease that builds up further in. That part needs specialist access and equipment.
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. Leave those to us.
Common questions in Cothill
Can you work in Cothill outside opening hours?
Yes, we can come after you close and finish before you open. Your customers, staff or residents in Cothill needn’t be disturbed. Tell us your opening hours when you ask for a quote.
Do you offer AHU cleaning in Cothill?
Yes, we work in Cothill and the places around it. Get in touch with the details and we will arrange a survey.
Can you come out in an emergency?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line, and we will advise on what to do next.
How much does AHU cleaning cost in Cothill?
The cost depends on the size of the system, its condition, access and timing. Ask us for a fixed quote, usually ready within one working day.
What’s TR19?
BESA’s ventilation hygiene specification in two main parts: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It is not law, but it’s the benchmark.
Are you fully insured?
Yes, we’re fully insured. We also hold CHAS and SafeContractor for clients who vet their contractors.
Will we get paperwork for the AHU clean?
Yes. You get a TR19® certificate plus before and after photos. Keep them in the maintenance log.
Can you look after several sites?
Yes. Send the list of sites and the work at each and you will get one fixed quote.
Between visits
After the visit, a few habits help the work last:
- Diary the inspection date recommended in the report
- Watch for drips or damp patches near the plant
- Look at the condensate drain whenever the unit is serviced
- Clear leaves and litter away from the intake
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.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air instead of leaving it to guesswork.
Why deal with it now?
Leave an AHU uncleaned and the dirt does not stay put. It moves on into the ductwork and out into the rooms, so cleaning the ducts without the unit only goes so far. Planning a trip to Cothill ahead is easier for everyone than a rushed one.
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you’re unsure, give us a ring on 0345 646 2711, or send details by email and we will give you an honest view and a fixed quote.
Why choose Duct Doctor in Cothill
- Ventilation hygiene specialists since 2009
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A written report with photos after every visit
- Every job surveyed first
Read our cost guide and our accreditations and certificates.