Greater London · Air handling unit cleaning
AHU Cleaning in City of Westminster
Need AHU cleaning in City of Westminster? We survey first, give you a fixed quote and work around your opening hours, then sign off with a report and photos.
- Odours coming through the supply air
- Air handling units with blocked filters
- Units that have only ever had filter changes
AHU cleaning in City of Westminster, done properly
An AHU clean is a thorough examination and treatment of the unit. We look inside each section, clean what we find and record it with pictures, so you can see the unit’s condition for yourself. The work covers dampers and louvres, heating and cooling coils and supply and extract fans, and the jobs we see most are dirty fans and fan housings and units needing a clean before a new tenant or handover.
Across London, offices, hotels, schools and healthcare buildings rely on mechanical ventilation, much of it supplied through air handling units on roofs or in basements. For a building in City of Westminster, dust settles in the units and ducts year after year.
We’ve been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Place
- City of Westminster (W2, NW8, W9, SW1V)
- Wider area
- Greater London
- Paperwork
- Photo report after every visit
- Quotes
- A fixed price before any work starts
- When we work
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Why act early in City of Westminster
A clogged coil or dirty fan makes the unit work harder for the same airflow. That means more wear on the motor and rooms that feel less fresh, and a planned clean is far less disruptive than a breakdown. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
Combining work into one visit or one programme can make for a more efficient booking. Tell us about everything you’d like looked at, and you’ll get one fixed quote.
Why book with us
- Fixed quotes, normally within one working day
- Ventilation hygiene specialists since 2009
- We diagnose before we treat
- We’re fully insured
Read our cost guide and our accreditations and certificates.
City of Westminster buildings and their air
There are about 78 schools, colleges and universities, about 27 care, childcare and hospital premises and about 280 hotels, B&Bs and guest houses on the FSA’s food hygiene register in City of Westminster and the streets around it, up to about 1.5 miles out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. For City of Westminster, the closest hospital is Fortius Clinic, roughly under half a mile north. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. London plant rooms are often on roofs or in basements reached through occupied floors.
Workplaces around Bond Street station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. If you manage a school such as St Vincent's Catholic Primary School, ventilation cleaning is best booked for the holidays.
City of Westminster is about 3 miles west of London, in Greater London. Every kind of commercial site in City of Westminster, AHU cleaning is something we can help with. We can work out of hours so the site keeps running. City of Westminster is one of 764 towns, villages and districts in Greater London we cover for AHU cleaning.
Postcode districts we cover here for AHU cleaning: W2, NW8, W9 and SW1V. You’ll find streets such as Portman Square, Grosvenor Square and Cavendish Square, all of which we cover for AHU cleaning. City of Westminster sits on or near the A4 and A5, so getting to you is simple for AHU cleaning. We also cover the places around City of Westminster: Marylebone (1 mile north-east), Mayfair (1 mile south-east), Tyburn (1 mile west), Burlington Estate (1 mile south-east) and Connaught Village (1 mile west). Further out, we also cover London (3 miles south-east), Shoreditch (3 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles north-east), Whitechapel (4 miles east) and Hampstead (3 miles north-west). Being one of Greater London’s larger places, City of Westminster has commercial sites of every size, all within our area for AHU cleaning.
Landmarks near City of Westminster
Around City of Westminster, our work takes us to kitchens and buildings near LITE Regal International School, Royal Society of Medicine Library and Devonshire Arms, among other places. Also close by are The St Marylebone CofE School (0.5 miles north) and Hyde Park (0.6 miles south-west). City of Westminster has its own railway station: Bond Street station. Well-known places in the area include Dunhill Museum & Archive (less than half a mile north) and Kingly Court (0.6 miles east). The countryside around City of Westminster includes Serpentine and Primrose Hill.
Staff cleaning versus specialist work
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.
For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Different parts, different methods
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
Drain trays
Older trays can corrode and start leaking. Their condition goes into the report with pictures so you can decide on any repairs.
Fixed quotes for AHU cleaning in City of Westminster
You’ll get a fixed price before work begins. It takes into account:
- The scale of the work
- Parking and loading at the site
- How easy every part is to reach
- One-off work versus a regular cycle
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before any work starts.
Asking for a quote
You don’t need the technical terms. It helps if you can send:
- Detail shots of panels, filters and grilles
- The times we could work without disrupting the site
- Where the site is and what kind of site it is
- How we’d reach plant on a roof or in a plant room
We do not publish a price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, then send a fixed quote. To start, give us a ring on 0345 646 2711 or send us an email.
Signs you need AHU cleaning in City of Westminster
An overdue filter loads up with dirt, which cuts the airflow and can let air slip round the filter. Then the rest of the unit takes the load.
If you notice any of these, it’s worth a diagnosis:
- Plant that needs cleaning after a refit
- Plant that has been serviced but not cleaned
- Blocked condensate drains and slimy trays
- Dirty coils holding back the airflow
Healthcare buildings such as Fortius Clinic, about under half a mile north, depend on their ventilation; if you manage a surgery, clinic or care home near City of Westminster, yours matters too.
What your quote should include
- If they look at the system before pricing
- Whether the quote shows VAT
- How areas they can’t reach will be recorded
- When the next visit should be, and why
The process
Your trading hours come first. We book the visit for a time the area is closed, whether that is an evening, overnight or a weekend. Once we’re in, the area is sheeted and anything that has to be off is turned off and cooled, and the job takes one overnight shift for many single units, with bigger plant phased. Security desks and permits-to-work are routine in London, so let us know what your building in City of Westminster needs from us.
- 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.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- 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
- Plan for cooking equipment or plant to be off before we arrive
- Name a contact who can let us in at the agreed time
- Let us know how we reach the system, including roofs, risers and plant rooms
Ask for a quote
Getting a quote doesn’t take long. Send a few details and photos, and we normally reply with a fixed quote within one working day. If we need to see the system first, we book a survey around your hours.
Read more
What AHU cleaning can’t fix
An honest diagnosis matters more to us than a booking, so here’s what AHU cleaning won’t do:
- Problems with the unit’s controls or sensors
- Coils that are corroded or leaking and need replacing
- Airflow problems caused by the system’s design
If in doubt, phone us on 0345 646 2711 or drop us a line and we will say what we think.
Where we work
- Drain trays
- Dampers and louvres
- Supply and extract fans
- Heating and cooling coils
- Filter sections
- Internal panels
City of Westminster: your questions answered
How do you handle parking and loading in City of Westminster?
We plan it in advance, so let us know about loading bays, permits and access rules at the building. Where restrictions apply in the day, an evening or overnight visit typically gets round them.
Can you clean school ventilation in City of Westminster during the holidays?
Yes, holiday work suits schools best. Food Standards Agency records list about 78 schools, colleges and universities with registered kitchens within about a mile and a half of City of Westminster. Send us your term dates when you ring 0345 646 2711 or drop us a line, and we will fit the work in.
Can you quote from photos?
Usually, yes. Send wide shots, close-ups of any access panels and anything that worries you, and we usually come back within one working day. Some sites still need a visit, and we’ll say so.
How much notice should we give?
That depends on the slot you want and the size of the job. Mention your preferred dates with your enquiry, and if it’s an emergency, call us any time.
What if parts of the system cannot be reached?
Anything we can’t reach goes on the report, with pictures where possible, and we tell you what would make it reachable, for example new access panels.
What is TR19?
TR19® is BESA’s specification for ventilation hygiene. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
What do you clean inside the unit?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. What happens to the filters is agreed when we quote.
Can we book visits on a schedule?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. Each report recommends when the next visit should be.