Greater London · Air handling unit cleaning
Greenwich AHU cleaning
Need AHU cleaning in Greenwich? We survey first, give you a fixed quote and work around your opening hours, then sign off with a report and pictures.
- Dirty filters cutting the airflow
- Drain trays holding standing water
- Units that have only ever had filter changes
AHU cleaning in Greenwich, done properly
Drain trays under cooling coils are meant to empty. If the outlet blocks, standing water and slime build up, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. If you are dealing with dirty coils holding back the airflow and plant that needs cleaning after a refit, we can help.
London buildings tend to keep their plant on the roof or below ground, so work in Greenwich is often done in the evening or at weekends. Parking and loading are agreed with the building in advance.
Each visit ends with a written report and photos, so you have a record of what was done and when. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Place
- Greenwich (SE10, SE3, SE8)
- Wider area
- Greater London
- Records
- Written report with pictures
- Quote
- A fixed price before we start
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Checked
- 30 October 2026
In-house cleaning or a specialist?
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We can diagnose it and quote.
Away from the kitchen, the in-house job is mainly checking: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
How the job changes from site to site
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. We clean the intake and first stage of filters along with the rest.
Aftercare tips
Good habits slow the build-up between visits. A few tips:
- Keep filter changes on time and recorded
- Look at the condensate drain whenever the unit is serviced
- Report musty smells from the vents right away
- Report water on the plant room floor
The ducts served by the unit may need attention too. A clean unit feeding dirty ducts only solves half the problem, and we can quote for both.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air instead of leaving it to guesswork.
What a clean will not put right
AHU cleaning cannot fix everything, and we’ll tell you before any work starts. It will not put right:
- Faulty motors, drives or bearings
- Damaged coils beyond cleaning
- A system that’s undersized for the building
Not sure which it is? You can give us a ring on 0345 646 2711, or send details by email and we’ll tell you honestly.
Parts of the system we cover
- Filter sections
- Internal panels
- Dampers and louvres
- Heating and cooling coils
- Supply and extract fans
- Drain trays
What happens on the day
Night work is normal for us. A lot of visits happen overnight or at weekends, so the site can open as normal afterwards. The visit itself takes half a day to a full day per unit, with large plant planned over several shifts. Expect the work in Greenwich to happen after your last customer leaves, not during trading.
- We start with a survey of the unit and a fixed quote for the work.
- With your site team, the unit is switched off and isolated, then the area around it protected.
- Filters, coils, fan section and casing are cleaned in turn.
- We clean out the drain tray and make sure it drains.
- A TR19® certificate and photo report follow the clean.
Before we arrive
- Move anything stored near the system
- Let us know when the site is closed or quiet
- Mention any parking or loading restrictions
Getting a quote
Quotes are quick. 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 looks like in Greenwich
The FSA’s food hygiene register lists about 53 schools, colleges and universities, about 77 hospitals, care homes and childcare premises and about 11 hotels, B&Bs and guest houses with registered kitchens or food service within 1.5 miles or so of the middle of Greenwich. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Ventilation cleaning in London buildings is usually planned for evenings or weekends. Greenwich District Hospital is the nearest hospital, about 0.5 miles north-east of Greenwich. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Workplaces around Maze Hill station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. For schools like Meridian Primary School, the holidays are the usual time to inspect and clean ventilation. Hospitals such as Greenwich District Hospital (about 0.5 miles north-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Greenwich are no different.
Greenwich is about 4 miles east of London, in Greater London. Every kind of commercial site in Greenwich, AHU cleaning is something we can help with. Visits can be booked for evenings, overnight or weekends so the site keeps running. Our area takes in 764 places across Greater London, from busy centres to quieter spots.
Postcode districts we cover here for AHU cleaning: SE10, SE3 and SE8. Streets in the area include Cade Road, Webb Road and Creek Road, and we cover them all for AHU cleaning. Greenwich is on the A2203 and A2211, which makes it straightforward for our technicians to reach for AHU cleaning. We also cover the places around Greenwich: Maze Hill (1 mile north-east), Vanbrugh Park Estate (1 mile east), Blackheath (1 mile south-east), Westcombe Park (1 mile east) and Isle of Dogs (1 mile north-west). Within a short drive, we also cover London (4 miles west), City of Westminster (7 miles west), Marylebone (7 miles west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Landmarks near Greenwich
We work in commercial kitchens and buildings around The Plume of Feathers pub, John Roan School and Royal School of Naval Architecture and Marine Engineering and the streets around them. Nearby too are Island Gardens (0.6 miles north-west) and St. Paul's (1.1 miles west). There’s a railway station in Greenwich itself: Maze Hill station. Nearby you will also find Greenwich Castle (less than half a mile south-west) and Greenwich District Hospital (0.5 miles north-east). Open spaces near Greenwich include Tower Hill and Creekside Discovery Centre.
Also near Greenwich
More services for Greenwich
Landlords, agents and facilities managers
Under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must assess and reduce fire risk, which may be the employer, owner, landlord, FM or managing agent. Where responsibility is shared, records matter even more.
From a single site to a large estate, you get the same standard: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
Why act early in Greenwich
A clean unit feeds cleaner air into the ductwork, so the ducts and grilles stay cleaner between cleans. It also means the next inspection has less to find. London buildings are shared, so a fire or failure in one system can reach the neighbours above and beside you.
One small site or a whole estate, we price it on the same basis: the work involved, the access and the timing. The price is fixed before work begins.
Why choose Duct Doctor in Greenwich
- CHAS, SafeContractor and ISO 9001
- We diagnose before we treat
- Full insurance on every job
- One number for every site across the South East and London
Read our cost guide or our accreditations.
Common questions in Greenwich
Do you clean school ventilation in Greenwich in the holidays?
Yes. Half-terms and the summer break are the natural time for school work. The FSA’s register shows about 53 schools and colleges with food registrations within roughly a mile and a half of Greenwich. Just ring 0345 646 2711 or drop us a line with your term dates and we’ll plan around them.
Can you work in Greenwich outside opening hours?
Yes, we can come after you close and finish before you open. The work in Greenwich can fit around your hours. Tell us your opening hours when you ask for a quote.
What do you clean inside the unit?
Everything inside the unit that air passes over, from intake to discharge, including coils, fan and drain trays. The photo report shows each section before and after.
How far ahead should we book?
The more notice, the better, particularly for night and weekend visits. We typically quote within one working day, and there’s a 24/7 line for emergencies.
Is a quote from photos possible?
Yes, if we can see what we need. Otherwise, we book a survey at a time that suits the site, then a fixed quote.
Do you give a certificate after the clean?
Yes. You receive a certificate and a report showing each section before and after, including anything we think needs attention.
Do you need to switch the unit off?
Yes, while the clean is under way. Out-of-hours work is available so the building isn’t left without ventilation when it’s busy.
Are you insured?
Yes. We carry full insurance and have been trading since 2009.