Greater London · Air handling unit cleaning
Air handling unit cleaning in Merton, Greater London
Our technicians work in Merton on air handling unit cleaning. Fixed quotes, work around your opening hours and photo reports on every job.
- Dirty fans and fan housings
- Odours coming through the supply air
- Condensate trays that won’t empty
How it works
Protection comes first: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. The work on site takes a single shift for a typical unit, longer for large or heavily soiled ones, and the area is cleaned down before we leave. Loading bays, visitor permits and roof access are the first things we ask about for a site in Merton.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- We clean the coils and clear the tray and drain.
- The unit is closed up and handed back, with a report to follow.
Getting ready for the visit
- Arrange a key holder or contact on site
- Dig out any earlier paperwork for the system
- Let us know about parking and loading
Ask for a quote
Getting a quote does not take long. Call or email with a few details and you will typically have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Advice
About our AHU cleaning in Merton
Every supply and extract system relies on the air handling unit at its centre: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Anything that collects inside the unit can end up in the rooms it serves, so cleaning the unit matters as much as cleaning the ducts. Common call-outs are for condensate trays that won’t empty and units that have only ever had filter changes, on heating and cooling coils, dampers and louvres and drain trays.
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 Merton, dust settles in the units and ducts year after year.
It’s worth checking any contractor’s accreditations. We’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Place
- Merton (SW19)
- Region
- Greater London
- Reporting
- Written report with pictures
- Quote
- A fixed price before any work starts
- When we work
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Why deal with it now?
Dirty coils and fans make the unit strain to move the same air. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. A building in Merton may have flats or offices above and alongside, and a fault in the system can affect them too.
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 will get one fixed quote.
Why us?
- Each visit written up, with photos
- We diagnose before we treat
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- Evenings, overnight and weekends, plus 24/7 emergency callout
Read our cost guide and our accreditations.
Towns and villages near Merton
Other services in Merton
Different parts, different methods
Rooftop and plant room units
Smaller units in ceiling voids are part of the work as well. We protect the area below before opening them.
Internal casing and panels
Access doors and panels are opened in turn and closed properly afterwards before the unit is handed back.
Questions from Merton
Can you clean school ventilation in Merton during the holidays?
Yes, holiday work suits schools best. The FSA’s register shows about 39 schools and colleges with food registrations within roughly a mile and a half of Merton. Tell us your holiday dates and we will book the visit for when the site is empty.
Can parking be tricky for a job in Merton?
London parking can be tight, so details of loading bays and permits help. If the building has a loading slot system, we’ll book into it.
Is Merton in your area?
Yes. We work across Greater London, Surrey, Kent, Sussex, Hampshire, the Isle of Wight, Berkshire, Buckinghamshire, Oxfordshire, Hertfordshire and Essex, Merton included.
How do you keep the site clean during the work?
By covering it before any work starts. We keep the work contained and clean down when we finish.
How much notice should we give?
Earlier is better, especially for out-of-hours work. Quotes typically come back within one working day, and there’s a 24/7 line for emergencies.
When should our AHU next be cleaned?
Inspection under TR19® Air decides it. Units in heavy use or in sensitive buildings may need attention more often.
Are you fully insured?
Yes. We carry full insurance, and we have been trading since 2009.
How long will the unit be out of action?
It takes from a few hours for a compact unit to a day or more for a large one. The unit’s size and condition make the biggest difference, and the quote will give you a clear idea.
When it’s something else
We will always give you a straight diagnosis, so here’s what AHU cleaning won’t do:
- Building management system faults
- Faulty motors, drives or bearings
- Airflow problems caused by the system’s design
If you are not sure, just give us a ring on 0345 646 2711 or send us an email and we’ll give you a straight answer before you book.
Where we work
- Drain trays
- Supply and extract fans
- Internal panels
- Heating and cooling coils
- Filter sections
- Dampers and louvres
Multi-site and managed buildings
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we can quote for the whole system.
Records are where multi-site compliance often slips. Each visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.
Merton buildings and their air
Food Standards Agency data includes about 39 schools, colleges and universities, about 49 hospitals, care homes and childcare premises and about 5 hotels, B&Bs and guest houses within 1.5 miles or so of the middle of Merton. Busy, occupied buildings like these are where clean supply air matters most. In London, ventilation plant is often on the roof or below ground, so the work is usually done out of hours. St George's Hospital is the nearest hospital, about 1.1 miles north-east of Merton. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
If you run an office near Haydons Road station, its supply ductwork can gather dust for years before anyone looks inside. Healthcare buildings such as St George's Hospital, about 1.1 miles north-east, depend on their ventilation; if you manage a surgery, clinic or care home near Merton, yours matters too. Classrooms and halls at schools such as Merton Abbey Primary School are easiest to work in when pupils are away.
Merton is about 1 mile south-east of Wimbledon, in Greater London. Across the SW19 area, we cover AHU cleaning for commercial sites. Our Greater London coverage runs to 764 places, and Merton is one of them. Our London page covers sites nearby (7 miles or so).
Every address in SW19 is covered for AHU cleaning, from busy streets to back roads. Streets in the area include High Path, Pincott Road and Hayward Close, and we cover them all for AHU cleaning. You will find Merton on the A24, which makes it straightforward for our technicians to reach for AHU cleaning. If your site is just outside Merton, we cover Merton Abbey (1 mile east), South Wimbledon (1 mile north-west), Colliers Wood (1 mile east), Tooting Bec (1 mile north-east) and Summerstown (1 mile north). We also work in nearby towns such as London (7 miles north-east), City of Westminster (7 miles north), Marylebone (7 miles north), Kensington (6 miles north), St Pancras (8 miles north) and Shoreditch (9 miles north-east).
Landmarks near Merton
Typical jobs here are in premises near The Nelson Arms, Wimbledon School of Art and Wandle Park. Merton’s nearest station is Haydons Road station, about 0.8 miles north. Other landmarks nearby include Southside Wandsworth (2.8 miles north) and St George's Hospital (1.1 miles north-east). Not far away are Henman Hill and Merton Park Green Walks.
Fixed quotes for AHU cleaning in Merton
The price is fixed before any work begins. It’s based on:
- How big the system is
- How many systems or sites are involved
- Any permits to work or inductions
- Travel, parking and unloading
No two sites are the same, so we price each one individually. The size of the job, how we reach it, its condition and the working hours all make a difference.
What to send for a quote
Photos let us diagnose from a distance. Try to include:
- The times we could work without disrupting the site
- Your last certificate, test record or report
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- The postcode and the type of business
We don’t publish a price list, because no two systems are the same. Instead, we look at your site first, from photos or a survey, and then send you a fixed quote. To start, ring 0345 646 2711, or email photos.
Staff cleaning versus specialist work
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. The inside of ducts and units needs a specialist.
Good housekeeping makes our visits easier, not unnecessary. Regular in-house cleaning slows the build-up, but the parts you can’t see still need a specialist at the right interval.