Greater London · Air handling unit cleaning
Air handling unit cleaning in Cannon Hill, Greater London
Our technicians work in Cannon Hill on air handling unit cleaning. Out-of-hours visits, a fixed quote and a written report with photos on every job.
- Fan sections that haven’t been cleaned in years
- Rooms that smell stuffy when the system runs
- Drain trays holding standing water
The process
Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, carry out the AHU cleaning, tidy up and hand over the paperwork. On site, the work takes one overnight shift for many single units, with bigger plant phased. For a job in Cannon Hill, tell us about loading bays, permits, lifts and roof access when you book.
- We look at the unit and the plant area during the survey.
- 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
- Plan for cooking equipment or plant to be off before we arrive
- Let us know about permits to work or site inductions
- Let us know how we reach the system, including roofs, risers and plant rooms
Get a fixed quote
If you need AHU cleaning in Cannon Hill, call us on 0345 646 2711 or email us. Let us know the site type and the opening hours, plus pictures or the previous report if they’re to hand. A fixed quote usually follows within one working day.
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AHU cleaning in Cannon Hill
Where a building in Cannon Hill has had little more than filter changes, there may be dirt on the coils, fan and casing that nobody has looked at. A full AHU clean takes in the whole unit. We are often asked to deal with dirty filters cutting the airflow and plant that has been serviced but not cleaned, on dampers and louvres, heating and cooling coils and filter sections.
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. In a building in Cannon Hill, dust and debris build up in the units and ductwork over time.
The report is your system’s health record: a dated account with pictures of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal, ready for your insurer.
- Location
- Cannon Hill (SW20, SM4, KT3)
- Wider area
- Greater London
- Paperwork
- Report and pictures after the visit
- Quote
- Fixed quote, typically within a working day
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Updated
- 30 October 2026
Leave it or put it right?
Leave an AHU uncleaned and the dirt does not stay put. It moves on into the ductwork and out into the rooms, so cleaning the ducts without the unit only goes so far. Leaving it on a busy London site only adds to the work.
What you pay depends on the size of the system, what state it’s in and access to every part of it. We give you a fixed price before any work starts, so you know where you stand.
Why book with us
- Every job surveyed first
- In business since 2009
- CHAS, SafeContractor and ISO 9001
- Fully insured
Take a look at what affects the cost or our accreditations and certificates.
Towns and villages near Cannon Hill
Other services in Cannon Hill
What we are called out for in Cannon Hill
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. So a unit can be well maintained and still dirty.
It’s time to book a visit if you see:
- Units that have only ever had filter changes
- Leaves and litter drawn into the unit
- Filters that are clogged or overdue
- Dirty fans and fan housings
If you run a surgery, dental practice or care home near Cannon Hill, clean ventilation matters as much to you as to a hospital like St. Anthony's Hospital (about 1.5 miles south).
What to look for in a quote
- When the next visit should be, and why
- What hours they’ll be on site
- Whether the quote is based on a survey or photos
- Whether the whole system is included, or only the parts that are easy to reach
Managing agents and facilities teams in Cannon Hill
Whether it’s one building or many, the standard is the same: a survey first, a fixed quote, the work timed around the site and a report with pictures.
Keeping records across a portfolio is half the battle. Each visit produces a dated report with photos, so you can show an insurer or inspector what was done at each site.
When something else is needed
We’d rather tell you now than book work that will not help, so here are the limits:
- The supply and extract ducts, quoted separately
- Airflow problems caused by the system’s design
- Faulty motors, drives or bearings
If you are not sure, just ring 0345 646 2711 or email us and we’ll give you a straight answer.
Parts of the system we cover
- Filter sections
- Drain trays
- Internal panels
- Heating and cooling coils
- Supply and extract fans
- Dampers and louvres
Different parts, different methods
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.
Filters
Clogged filters reduce airflow, and dirt can get round the edges. We clean the frames and rails so the filters sit tight.
Cannon Hill questions
Do you clean school ventilation in Cannon Hill in the holidays?
Yes, out-of-term visits are normal for schools. With about 34 schools and colleges on the FSA’s register within roughly a mile and a half of Cannon Hill, it pays to plan holiday dates ahead. Send us your term dates when you call us on 0345 646 2711 or use the quote form, and we’ll fit the work in.
How do you handle parking and loading in Cannon Hill?
A loading bay, a visitor permit or off-street space near the site in Cannon Hill makes the visit easier to plan. Night visits tend to make loading easier on London streets.
Do you do ventilation duct cleaning too?
Yes. We clean supply and extract ductwork to TR19® Air as well. It’s often worth doing both at once, and we can survey both on the same visit.
Can you come out in an emergency?
Yes. If something urgent happens, like a fan failing or damage after a fire, call our 24/7 line and we will talk you through the next steps.
Can you set up regular visits?
Yes. Scheduled maintenance plans are part of what we do, with visits at the interval your system needs. Each report recommends when the next visit should be.
What does AHU cleaning cost?
There’s no set price, as it depends on the job: the size of the system, its condition, access and when we can work. We fix the price before any work starts.
What’s TR19?
A BESA specification in two main parts: TR19® Grease for kitchen extracts and TR19® Air for supply and extract systems. It isn’t law, but it’s the benchmark.
Is there a survey before the work?
Yes. Photos often do the job, while bigger or harder-to-see systems are surveyed on site.
Cannon Hill buildings and their air
The FSA’s food hygiene register lists about 34 schools, colleges and universities, about 42 hospitals, care homes and childcare premises and about 4 hotels and guest houses with registered kitchens or food service within roughly a mile and a half of the centre of Cannon Hill. Busy, occupied buildings like these are where clean supply air matters most. Cannon Hill’s nearest hospital, St. Anthony's Hospital, is about 1.5 miles south. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. In London, ventilation plant is often on the roof or below ground, so the work is normally done out of hours.
For workplaces around South Merton station with mechanical ventilation, cleaning can be done in the evening or at weekends. For schools like Hillcross Primary School, the holidays are the usual time to inspect and clean ventilation.
Cannon Hill is about 1 mile north-west of Morden, in Greater London. Anywhere in SW20, we can take on AHU cleaning. 764 places in Greater London are on our list, from busy centres to quieter spots. There’s also a page for London, roughly 9 miles from Cannon Hill.
All of SW20, SM4 and KT3 is covered for AHU cleaning, from busy streets to back roads. AHU cleaning is available to premises on Aylward Road, Camborne Road and Botsford Road and nearby roads. If your site is just outside Cannon Hill, we cover Bushey Mead (1 mile north-west), Raynes Park (1 mile west), Wimbledon Chase (1 mile north), West Barnes (1 mile west) and Merton Park (1 mile north-east). We also work in nearby towns such as London (9 miles north-east), City of Westminster (8 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Near you in Cannon Hill
In Cannon Hill, that means kitchens and buildings near The Edward Rayne pub, Cannon Hill Common and Harris Academy Wimbledon. The closest station to Cannon Hill is South Merton station, roughly 0.5 miles north-east of the centre. Other landmarks nearby include St. Anthony's Hospital (1.5 miles south) and Wimbledon Museum (1.6 miles north). Open spaces near Cannon Hill include Cherry Wood and Henman Hill.
Aftercare tips
A little care between visits keeps the system in better shape. Our advice:
- Report water on the plant room floor
- Keep filter changes on time and recorded
- Report stiff or damaged access doors
- Clear leaves and litter away from the intake
We recommend when the unit should next be inspected or cleaned, taking into account how dirty it was. Under TR19® Air the timing is set by inspection and risk, not a fixed calendar.
Make sure access doors and panels on the unit open easily. Sections that are awkward to open are the ones that get skipped.