Surrey · Air handling unit cleaning
Heathrow AHU cleaning
We cover Heathrow for air handling unit cleaning. Out-of-hours visits, a fixed quote and a written report with pictures on every job.
- Rooms that smell stuffy when the system runs
- Dirty coils holding back the airflow
- Units that have only ever had filter changes
Keeping the system healthy
Once we’ve finished, these simple steps help:
- Keep inspection doors on the unit in good order
- Keep filter changes on time and recorded
- Diary the inspection date recommended in the report
- Clear leaves and litter away from the intake
Photos in the report cover the filters, coils, drain tray, fan and casing, and note any part we couldn’t get to. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Do not let leaves, litter or stored materials build up near the fresh air intake. Anything around the intake is likely to be drawn in.
AHU cleaning in Heathrow, done properly
Our AHU cleaning covers sites in Heathrow and the rest of Surrey, in offices, schools, hospitals, care homes and retail. The work is timed around when the system can be switched off, including evenings, nights and weekends. The work covers internal panels, dampers and louvres and filter sections, and people most often call us about dirty coils holding back the airflow 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, where filters and drain trays get forgotten.
Accreditations are easy to claim and worth checking. We’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Where
- Heathrow (TW6)
- Wider area
- Surrey
- Reporting
- Photo report after every visit
- Quotes
- A fixed quote up front
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
Common problems we fix in Heathrow
No filter stops everything. The fine dust that passes the filters lands on the coils, the fan and the internal panels, building up layer by layer.
Signs it’s time to call us include:
- Intake sections clogged with outdoor debris
- Plant that has been serviced but not cleaned
- Dirty filters cutting the airflow
- Rooms that smell stuffy when the system runs
Healthcare buildings such as Harlington, about 1.6 miles north, depend on their ventilation; if you manage a surgery, clinic or care home near Heathrow, yours matters too.
Questions to ask before you book
- When they can work, and whether that is outside your opening hours
- If the quote is a fixed price or an estimate
- Which accreditations they hold, and whether you can check them
- Whether the quote shows VAT
Heathrow: your questions answered
Do you clean school ventilation in Heathrow in the holidays?
Yes. The holidays are the usual time for school work. Around Heathrow, the Food Standards Agency lists about 3 schools and colleges with registered kitchens within a mile and a half or so. Send us your term dates when you give us a ring on 0345 646 2711, or email photos, and we’ll fit the work in.
Is Heathrow within the area you cover?
Yes, smaller places are covered as well as towns. Photos of the system and directions to the site help us plan the visit.
How do you protect the area?
We start with protection: sheeting over floors, worktops and anything close to the work. We tidy up and take our waste away before we leave.
What types of premises do you cover?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, as well as food production and leisure sites.
Can you fix a faulty AHU?
We clean the unit and flag faults rather than repair them, with pictures where it helps.
Do you give a certificate after the clean?
Yes. Every clean comes with a TR19® certificate and a photo report. Keep them in the maintenance log.
Can we book visits on a schedule?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, to suit the system and how it’s used.
Can you quote from pictures?
Yes, where the photos show enough. If not, a site survey comes first, then a fixed quote.
Multi-site and managed buildings
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements and we’ll come back with a fixed quote.
Keeping records across a portfolio is half the battle. Each visit ends with a dated report and pictures, ready to show insurers, fire officers or EHOs.
What affects the quote in Heathrow
Some jobs are bigger than they look, and some smaller. The main factors:
- How big the system is
- Any permits to work or inductions
- How many systems or sites are involved
- Whether we need access equipment or extra panels
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, which can make the next visit longer. If you are not sure what’s needed, call 0345 646 2711 or drop us a line and we will give you an honest view and a fixed quote.
What we need to know
A few details help us quote accurately. With your enquiry, please include:
- Where the site is and what kind of site it is
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Any access panels or hatches you can see
- Your opening hours and when the area is out of use
Every quote begins with a look at the system, either from photos and details you send or from a site visit. Then we send a fixed price, before any work starts.
Why deal with it now?
If people in a building in Heathrow complain about stuffy or smelly air, the AHU is worth looking at. Cleaning it deals with the cause rather than the symptom. In a small place like Heathrow, a system that fails can take a site out of use.
The cost depends on how big the system is, what state it’s in and access to every part of it. We give you a fixed price before any work starts, so there are no surprises.
Why choose Duct Doctor in Heathrow
- A written report with photos after each visit
- Every job surveyed first
- Accredited under CHAS and SafeContractor, with ISO 9001
- Fixed quotes from a survey or pictures
Take a look at what affects the cost and how to check a contractor.
Honest limits
An honest diagnosis matters more to us than a booking, so here’s what this work cannot put right:
- Airflow problems caused by the system’s design
- Coils that are corroded or leaking and need replacing
- Controls and BMS settings that run the unit
Not sure which it is? You can give us a ring on 0345 646 2711 or send us an email and we’ll tell you honestly before booking.
Parts of the system we cover
- Filter sections
- Dampers and louvres
- Supply and extract fans
- Internal panels
- Drain trays
- Heating and cooling coils
Ventilation in Heathrow buildings
Going by the FSA’s register, there are about 3 schools, colleges and universities, about 7 hospitals, care homes and childcare premises and about 17 hotels and B&Bs serving food within 1.5 miles or so of the middle of Heathrow. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Heathrow is about 16 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. Harlington is the nearest hospital, about 1.6 miles north of Heathrow. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
If you manage shops or offices close to Heathrow Terminals 2 & 3 Rail station, a TR19® Air inspection shows whether the ductwork needs cleaning. If you manage a school such as Bedfont Primary School, ventilation cleaning is best booked for the holidays.
Heathrow is about 2 miles north-west of Feltham, in Surrey. We provide AHU cleaning for commercial premises of every kind in Heathrow and the rest of Surrey. 395 places in Surrey are on our list, from busy centres to quieter spots. Our London page covers sites nearby, about 16 miles away.
AHU cleaning in TW6 follows the same survey, fixed quote and written report as everywhere else we cover. Neighbouring places we cover for AHU cleaning include West Bedfont (1 mile south-west), Hatton (1 mile east), Bedfont (1 mile south-east), Stanwell (1 mile south-west) and Harlington (1 mile north-east). Further out, we also cover Woking (12 miles south-west), Camberley (15 miles south-west), Epsom (12 miles south-east), Ewell (12 miles south-east), Egham (5 miles south-west) and Walton-on-Thames (6 miles south).
Near you in Heathrow
In Heathrow, that means kitchens and buildings near The Queen's Arms and Space Studio West London, among other places. There’s a railway station in Heathrow itself: Heathrow Terminals 2 & 3 Rail station. Well-known places in the area include Spelthorne Museum (3.5 miles south-west) and Harlington (1.6 miles north). Not far away are Staines Reservoirs and Crane Meadows.
Nearby places to Heathrow
Other services in Heathrow
The process
The first job on site is protection: floors, worktops and anything near the work are covered. Then we make the system safe and start. The work on site takes half a day to a full day per unit, with large plant planned over several shifts, and we clear up before we go. We agree a date with you, plan the drive to Heathrow and turn up when the site is quiet.
- We survey the unit from pictures or on site and agree what’s included.
- We arrange the shutdown with your staff and sheet the area.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- Drain trays are cleared and cleaned and the outlet checked.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Mention any parking or loading restrictions
- Tell us the best time to work, such as after service or at a weekend
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Getting a quote
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, you get a fixed price before any work starts.