Greater London · Air handling unit cleaning
AHU Cleaning in St Luke's
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for businesses, landlords and public buildings in St Luke's. CHAS, SafeContractor and ISO 9001, and fully insured.
- Units that have only ever had filter changes
- Units needing a clean before a new tenant or handover
- Dirty coils holding back the airflow
AHU cleaning in St Luke's
Drain trays under cooling coils are meant to empty. When the drain blocks, water sits there and the tray turns slimy, right in the path of the air going into the building. Cleaning and clearing it is a key part of the job. We’re often asked to deal with plant that needs cleaning after a refit and dirty coils holding back the airflow, across dampers and louvres, drain trays and supply and extract fans.
London buildings often depend on air handling units in plant rooms or on the roof to supply fresh air. In a building in St Luke's, dust and debris build up in the units and ductwork over time.
Insurers, fire officers and environmental health officers all look at records. That’s why every job is written up in a report with photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Where
- St Luke's (N1, EC1V, EC2A)
- Region
- Greater London
- Reporting
- Written report with photos
- Quote
- A fixed price before we start
- Working hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Questions from St Luke's
Can you come to St Luke's after we close?
Yes, out-of-hours work is a big part of what we do. It means the site in St Luke's keeps running as normal. Your opening times are the first thing we ask for.
Do you do school ventilation cleaning in St Luke's in the summer holidays?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 70 schools, colleges and universities with registered kitchens within about a mile and a half of St Luke's. Booking early in the term gives the best choice of holiday dates.
How much does AHU cleaning cost?
Size, condition, access and working hours all affect the cost. Call for a fixed quote and we will typically reply within one working day.
Do you give a certificate after the clean?
Yes, a TR19® certificate and a photo report. It includes a recommended date for the next check.
How long does an AHU clean take?
Cleaning takes half a day to a full day per unit, with large plant planned over several shifts. Large plant can be split over several shifts, so ring 0345 646 2711 or send us an email to talk it through.
Can one contract cover all our sites?
Yes. Our area covers London and the South East, so we can schedule a run of sites as one programme. Each site gets its own report and pictures.
Do you have insurance?
Yes. Duct Doctor is fully insured, and the details are available on request.
Can you set up regular visits?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. Each report recommends when the next visit should be.
What affects the cost of AHU cleaning
Every site gets its own quote. These are the things that affect it:
- Site requirements such as sign-in and permits
- When the work can happen, such as evenings, overnight or weekends
- The number of sites or systems
- Access, including roofs, risers and ceiling voids
Every site is different, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all make a difference.
Asking for a quote
There’s no need for technical detail. It helps if you can send:
- Where the site is and what kind of site it is
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The paperwork from the last visit, if you have it
- Where the plant sits or the system leaves the building, such as a roof or outside wall
If you need AHU cleaning in St Luke's, phone us on 0345 646 2711 or drop us a line. Tell us what kind of premises it is and when it’s open, and send pictures or your last report if you can. We usually send a fixed quote within one working day.
How it works
Your trading hours come first. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. Once we are in, the area is sheeted and anything that has to be off is turned off and cooled, and the job takes half a day to a full day per unit, with large plant planned over several shifts. Most London sites cannot stop for the day, so work in St Luke's is normally done overnight, early in the morning or at weekends.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Make sure equipment near the work can be switched off and left to cool
- Make sure someone can let us in and lock up afterwards
- Mention any locked doors, roof access or ceiling voids
How to get a quote
For a fixed quote, give us a ring on 0345 646 2711, or send details by email with the site type, your trading hours and a short description of the system. Photos and the last report, if you have one, make the quote quicker. You will normally have a quote within one working day.
Advice
Part by part
Fans and fan sections
The fan section is cleaned with the unit switched off and isolated in agreement with the site.
Drain trays
Drain trays can rust and leak over time. We record their condition with pictures so repairs can be planned.
Leave it or put it right?
Cleaning a unit while it only has light dust is quick. Leave it for years and dirt bakes onto coils and casings, especially where there’s been moisture. A busy site in St Luke's builds up dirt and wear quickly, so putting it off makes the eventual job larger.
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. You’ll have a fixed price before work begins.
Why choose Duct Doctor in St Luke's
- Every visit written up, with pictures
- Trading since 2009
- A single point of contact for sites across the South East and London
- Work around your opening hours, with 24/7 emergency cover
See how cleaning jobs are priced or how to check a contractor.
Aftercare tips
How long the results last depends on use and care. We suggest:
- Keep the area around the fresh air intake clear
- Change filters on schedule and log each change
- Keep inspection doors on the unit in good order
- Look at the condensate drain whenever the unit is serviced
The report suggests a date for the next inspection or clean, based on what we found. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Check drain trays and condensate drains during routine maintenance. A drain that’s cleared early never gets to the slime stage.
Nearby places to St Luke's
Also in St Luke's
What a clean won’t put right
AHU cleaning can’t fix everything, and we will tell you before any work starts. It won’t put right:
- Ventilation that was badly designed in the first place
- Breakdowns that need a mechanical engineer
- Problems with the unit’s controls or sensors
If in doubt, phone us on 0345 646 2711 or use the quote form and we’ll say what we think before booking.
What we work on in St Luke's
- Drain trays
- Internal panels
- Heating and cooling coils
- Dampers and louvres
- Filter sections
- Supply and extract fans
Staff cleaning versus specialist work
When your team notices a problem between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We will take a look and give you a fixed quote.
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.
AHU cleaning around St Luke's
The FSA’s food hygiene register lists about 70 schools, colleges and universities, about 70 care, childcare and hospital premises and about 126 hotels, B&Bs and guest houses with registered kitchens or food service within about 1.5 miles of central St Luke's. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. The nearest hospital to St Luke's is St Luke's Hospital for Lunatics, about less than half a mile east. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. Getting kit to a London plant room usually means lifts, stairs and an agreed loading slot.
Healthcare ventilation, from large hospitals like St Luke's Hospital for Lunatics (about within half a mile east) to small clinics, depends on clean filters, coils and ducts. For schools like St Luke's CofE Primary School, the holidays are the usual time to inspect and clean ventilation. If you run an office near Old Street station, its supply ductwork can gather dust for years before anyone looks inside.
St Luke's is about 2 miles north of London, in Greater London. We provide AHU cleaning for commercial premises of every kind in St Luke's and the rest of Greater London. St Luke's is one of 764 towns, villages and districts in Greater London we cover for commercial clients.
We work across N1, EC1V and EC2A for AHU cleaning and the streets around it. If you need AHU cleaning at premises on Long Lane, City Road and Moor Lane or anywhere close by, we can help. Main roads around St Luke's include the A1 and A501, which makes travel easy for evening and night visits. Nearby, we also carry out AHU cleaning in Finsbury (1 mile south), Barbican Estate (1 mile south), Shoreditch (1 mile east), Hoxton (1 mile north-east) and City of London (1 mile south). Within a short drive, we also cover City of Westminster (3 miles west), Kensington (5 miles west), Walthamstow (5 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west) and Brompton (4 miles south-west).
Local landmarks in St Luke's
We work in commercial kitchens and buildings around Barts Health Archives, Charterhouse Square School and The Masque Haunt pub. Nearby too are St Mary-at-Hill (1.1 miles south), Central Foundation Boys' School (within half a mile east) and Artillery Ground (within half a mile south-east). There’s a railway station in St Luke's itself: Old Street station. Well-known places in the area include Gabriel's Wharf (1.3 miles south-west) and Montfichet's Tower (0.9 miles south-west). Open spaces near St Luke's include St. James's Park Lake and Barnsbury Wood.