Greater London · Air handling unit cleaning
Air handling unit cleaning in Westminster, Greater London
AHU cleaning for businesses, landlords and public buildings in Westminster. CHAS, SafeContractor and ISO 9001, and fully insured.
- Units that have only ever had filter changes
- Dust-coated heating and cooling coils
- Air handling units due a clean after building work
How it works
On the day, we arrive at the time agreed with you, often in the evening, overnight or at the weekend so the site keeps working. Equipment that has to be off is switched off and allowed to cool first, and floors and nearby surfaces are sheeted. The work itself takes half a day to a full day per unit, with large plant planned over several shifts. In Westminster, as across London, we usually work overnight or at weekends and hand the site back ready to open.
- We survey the unit from photos or on site and agree what’s included.
- With your site team, the unit is switched off and isolated, then the area around it 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.
- We close up the unit and send the certificate and before and after pictures.
How to prepare
- Agree a time when the area can be out of use
- Plan for cooking equipment or plant to be off before we arrive
- Tell us about site rules, permits or sign-in
Get a fixed quote
Photos are the quickest way to a quote: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Add the site type and your opening hours, and many jobs can be priced from that alone.
Advice
About our AHU cleaning in Westminster
Drain trays under cooling coils are meant to empty. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Clearing and cleaning the tray is central to every AHU clean. If you have leaves and litter drawn into the unit and stale or musty smells from the ventilation, we can put it right.
London buildings tend to keep their plant on the roof or below ground, so work in Westminster is often done in the evening or at weekends. Parking and loading are agreed with the building in advance.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Where
- Westminster (SW1P, W1J, SW1V)
- Region
- Greater London
- Reporting
- Photo report after each visit
- Quotes
- A fixed quote up front
- When we work
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Common questions in Westminster
Does London parking affect a job in Westminster?
London parking can be tight, so details of loading bays and permits help. Night visits tend to make loading easier on London streets.
Can ventilation in schools around Westminster be cleaned out of term?
Yes. The holidays are the usual time for school work. Food Standards Agency records list about 85 schools, colleges and universities with registered kitchens within about a mile and a half of Westminster. Send us your term dates when you ring 0345 646 2711 or drop us a line, and we’ll fit the work in.
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.
Will the ventilation be off while you clean?
Yes. The fan must be stopped and the unit isolated, and we time the work to suit the site.
Can you clean the AHU out of hours?
Yes. We time the work to fit the building’s hours. In hospitals and care homes, we agree timings with the site team.
How do you keep the site clean during the work?
By covering it before any work starts. The work is kept contained and clean down when we finish.
What does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: how big it is, what state it’s in, how we reach it and the working hours. We fix the price before we start.
Do you do ventilation duct cleaning too?
Yes, supply and extract ducts, grilles and diffusers. We’ll tell you after the survey whether the ducts need it.
What affects the cost of AHU cleaning
You’ll get a fixed price before work begins. It’s based on:
- How easy every part is to reach
- The condition of the system
- The times the site is available
- Any permits to work or inductions
No two sites are the same, so we price each one individually. Size, access, the condition of the system and when we can work all make a difference.
Asking for a quote
You don’t need the technical terms. It helps if you can send:
- Photos showing the whole system and its surroundings
- Any previous report or certificate
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Any symptoms, from odd noises to smells or leaks
Here’s what helps us quote: where the site is, what it is and its opening hours, pictures of the system and any previous report or certificate. Then ring 0345 646 2711 or use the quote form.
Why deal with it now?
If people in a building in Westminster complain about stuffy or smelly air, the AHU is worth looking at. Cleaning it deals with the cause rather than the symptom. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
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 we start.
Why Westminster businesses choose us
- Survey first, then a fixed quote
- Photo reports with every job
- A fixed price before any work starts
- CHAS and SafeContractor accredited, with ISO 9001
Read what affects the cost or our accreditations.
AHU cleaning around Westminster
Going by the FSA’s register, there are about 85 schools, colleges and universities, about 32 care, childcare and hospital premises and about 187 hotels, B&Bs and guest houses serving food within 1.5 miles or so of the middle of Westminster. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. The nearest hospital to Westminster is Westminster Hospital, about under half a mile east. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital. In London, ventilation plant is often on the roof or below ground, so the work is typically done out of hours.
Healthcare buildings such as Westminster Hospital, about within half a mile east, depend on their ventilation; if you manage a surgery, clinic or care home near Westminster, yours matters too. Classrooms and halls at schools such as Harris Westminster Sixth Form are easiest to work in when pupils are away.
Westminster is about 1 mile south-east of City of Westminster, in Greater London. Across the SW1P area, we can carry out AHU cleaning at your premises. Our Greater London coverage runs to 764 places, Westminster among them.
We work across SW1P, W1J and SW1V for AHU cleaning and the roads nearby. Whether your site is on Eaton Lane, Wilton Road and Castle Lane or anywhere close by, our technicians can take on the work. Westminster is on the A4 and A202, so it’s easy for us to get to for AHU cleaning. Nearby, we also carry out AHU cleaning in Millbank (1 mile north), Victoria (1 mile south-west), Pimlico (1 mile south), Vauxhall (1 mile south-east) and Lambeth (1 mile south-east). Larger places within reach include Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (4 miles north-west).
What’s near Westminster
We work in commercial kitchens and buildings around St Matthew's School, St James's Park and Blewcoat School, among other places. Also close by are London Library (0.6 miles north) and Grafton Arms (within half a mile south). Westminster’s nearest station is London Victoria station, about 0.6 miles south-west of the centre. Other landmarks nearby include Westminster Hospital (under half a mile east) and The Crime Museum (within half a mile south). Open spaces near Westminster include Barnsbury Wood and St. James's Park Lake.
Towns and villages near Westminster
Other services in Westminster
Common problems we fix in Westminster
Air handling units are typically tucked away on roofs, in plant rooms or above ceilings and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
Clients usually contact us when they notice one of these:
- Dust built up on fan impellers
- Plant that has been serviced but not cleaned
- Dirty coils holding back the airflow
- Leaves and litter drawn into the unit
If you run an office near London Victoria station, its supply ductwork can gather dust for years before anyone looks inside.
Comparing quotes
- What records you will receive afterwards
- If they look at the system before pricing
- When they can work, and whether that is outside your opening hours
- Whether they’re fully insured
What your team can do, and what needs us
Staff cleaning does not replace a specialist visit; it supports it. Clean filters and tidy surfaces slow the build-up, but the parts you can’t see still need a specialist at the right interval.
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We can diagnose it and quote.
What AHU cleaning cannot fix
We won’t sell you work that doesn’t address the problem, so here are the limits:
- Mechanical faults with motors, belts or bearings
- Airflow problems caused by the system’s design
- Coils that are corroded or leaking and need replacing
If in doubt, give us a ring on 0345 646 2711 or email us and we’ll say what we think.
Parts of the system we cover
- Drain trays
- Filter sections
- Heating and cooling coils
- Dampers and louvres
- Supply and extract fans
- Internal panels
Managing agents and facilities teams in Westminster
Whether it’s one building or many, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
We also work for facilities teams across offices, schools and healthcare across Greater London. Work can be phased by floor, building or site to keep disruption down.