Greater London · Air handling unit cleaning
Air handling unit cleaning in St Mary Cray, Greater London
Our technicians work in St Mary Cray on air handling unit cleaning. Fixed quotes, work around your opening hours and photo reports as standard.
- Drain trays holding standing water
- Dust-coated heating and cooling coils
- Plant that needs cleaning after a refit
How we handle AHU cleaning in St Mary Cray
Coils are where a lot of the dirt ends up. A coated coil restricts airflow and makes the unit work harder. Coils are cleaned carefully, with methods chosen so the fins are not flattened. If you’re dealing with filters that are clogged or overdue and plant that needs cleaning after a refit, we can put it right.
Many London buildings have had their ventilation extended and altered through several fit-outs, with old runs left behind that are hard to reach. An inspection first shows where cleaning is needed in a building in St Mary Cray.
A written report with photos follows every visit, so there’s a dated record of the work. Where the work is a TR19® Grease clean, the certificate is issued through the BESCA Vent Hygiene Elite portal.
- Place
- St Mary Cray (BR5, BR6, BR7)
- Region
- Greater London
- Paperwork
- Photo report after every visit
- Quote
- A fixed price before work begins
- Working hours
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What happens on the day
We start by comparing what we find with the survey or your photos. Anything unexpected is raised with you before we go further. From there, it takes one overnight shift for many single units, with bigger plant phased. Managed blocks in London often need contractors booked in ahead, and we are happy to deal with the agent directly for a site in St Mary Cray.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- 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
- Mention any sign-in, permit or induction we need
- Let us know when the site is closed or quiet
- Clear the space around the work
How to get a quote
For AHU cleaning in St Mary Cray, give us a ring on 0345 646 2711, or email photos. Let us know the site type and the opening hours, and send photos or your last report if you can. We normally send a fixed quote within one working day.
Advice
Towns and villages near St Mary Cray
Other services in St Mary Cray
Signs you need AHU cleaning in St Mary Cray
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray doesn’t fall properly, water stands in it, and slime and smells soon follow.
Most sites get in touch after spotting one of these:
- Dirty filters cutting the airflow
- Rooms that smell stuffy when the system runs
- Units that have only ever had filter changes
- Units needing a clean before a new tenant or handover
If you manage a school such as Poverest Primary School, ventilation cleaning is best booked for the holidays.
Before booking anyone
- Whether inaccessible sections are listed on the report
- When they can work, and whether that is outside your opening hours
- Proof of insurance
- Whether the figure could change on the day
Questions from St Mary Cray
Can you come to St Mary Cray after we close?
Yes. We work evenings, overnight and at weekends. It means the site in St Mary Cray keeps running as normal. Let us know the hours you’re closed and we will book within them.
Can parking be tricky for a job in St Mary Cray?
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.
How much notice should we give?
For planned work, earlier is better, particularly if your next visit is nearly due. Emergencies are different, because our line is open 24/7.
What happens if you cannot reach some of it?
They’re listed in the report, never skipped quietly. You’ll know exactly which parts weren’t reached and why, and we can quote to improve the access.
Is there a survey before the work?
Yes, every time. Diagnosis comes before treatment: the survey shows what needs doing and what access we need and the fixed quote is built on it.
How long does it take to clean an air handling unit?
Expect it to take anything from half a day for one small unit to several shifts for a plant room full of them. Size, layout and how dirty it is decide the rest, and we’ll confirm the time when we quote.
Are you accredited?
We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
Where does the waste go?
Anything we remove is contained as we work and taken away with us, from grease and debris to used cleaning water. None of it is left on site.
Managing agents and facilities teams in St Mary Cray
We regularly work with managing agents. Send the address, what’s needed and how access works and we will come back with a fixed quote.
Records are where multi-site compliance often slips. Each visit produces a dated report with photos, so you can show an insurer or inspector what was done at each site.
What the work involves, part by part
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. We protect the area below before opening them.
Fans and fan sections
Before the fan is touched, the unit is shut down and made safe with your site team.
Staff cleaning versus specialist work
Staff cleaning and specialist work aren’t the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. Reaching it takes a specialist with the right equipment.
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, and that’s where we come in.
Why act early in St Mary Cray
Standing water in a drain tray doesn’t clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Clearing it now is a much smaller job. A building in St Mary Cray may have flats or offices above and alongside, and a fault in the system can affect them too.
The price reflects the work, not guesswork. That’s why every job is surveyed first, and the price is agreed before work begins.
Why book with us
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Every visit written up, with photos
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Fully insured
Take a look at our cost guide and our accreditations.
When something else is needed
We will always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Ductwork downstream of the unit, which is a separate clean
- Faulty motors, drives or bearings
- Leaking heating or cooling coils
Not sure which it is? You can call 0345 646 2711 or send us an email and we’ll tell you honestly before you book.
What the work covers
- Drain trays
- Dampers and louvres
- Supply and extract fans
- Internal panels
- Filter sections
- Heating and cooling coils
Ventilation in St Mary Cray buildings
There are about 7 schools, colleges and universities and about 13 hospitals, care homes and childcare premises on the FSA’s food hygiene register in and around St Mary Cray, up to about a mile and a half out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Many London buildings have had their ductwork altered through several fit-outs, so an inspection comes first. For St Mary Cray, the closest hospital is Queen Mary's Hospital, roughly 1.9 miles north. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
If you manage offices or shops near St Mary Cray station, their ventilation can be inspected and cleaned out of hours. Healthcare ventilation, from large hospitals like Queen Mary's Hospital (about 1.9 miles north) to small clinics, depends on clean filters, coils and ducts.
St Mary Cray is about 11 miles south-east of London, in Greater London. We carry out AHU cleaning for commercial premises of every kind in St Mary Cray and the rest of Greater London. St Mary Cray is one of 764 towns, villages and districts in Greater London we cover for AHU cleaning. For sites nearby, see our London page, about 11 miles away.
We cover every part of BR5, BR6 and BR7 for AHU cleaning and the roads nearby. Whether your site is on New Road, Kent Road and Park Road or anywhere close by, we can help. St Mary Cray is on the A224, which makes it straightforward for our technicians to reach for out-of-hours visits. Neighbouring places we cover for AHU cleaning include Poverest (1 mile south-west), St Paul's Cray (1 mile north), Orpington (1 mile south), Derry Downs (1 mile south-east) and Kevington (1 mile east). We also work in nearby towns such as London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
Local landmarks in St Mary Cray
Typical jobs here are in premises near Harris Academy Orpington, The Blue Anchor Public House and Walsingham School, among other places. St Mary Cray has its own railway station: St Mary Cray station. A little further out are London Borough of Bromley Museum (0.9 miles south) and Lullingstone Castle (4.5 miles south-east). Not far away are Summer Hill and The Warren.