Greater London · Air handling unit cleaning
AHU Cleaning in St Paul's Cray
One call covers air handling unit cleaning in St Paul's Cray, from survey to sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Dust-coated heating and cooling coils
- Intake sections clogged with outdoor debris
- Blocked condensate drains and slimy trays
About our AHU cleaning in St Paul's Cray
The fan pushes every bit of air in the system, so dirt on the impeller and housing gets spread around. Fan, housing and the surrounding panels are cleaned as part of the job, once the unit has been shut down and isolated. The work covers internal panels, drain trays and filter sections, and the jobs we see most are coils clogged with dust and debris and air handling units never cleaned inside.
London offices and flats often have ductwork added through successive refits, with old runs left behind that are hard to reach. An inspection first shows where cleaning is needed in a building in St Paul's Cray.
The paperwork matters as much as the work. Each visit is written up with photos, covering the work done, any areas we couldn’t access and a recommended next date. File it in your maintenance log so it’s to hand when an insurer or inspector asks.
- Where
- St Paul's Cray (BR5, BR7)
- Region
- Greater London
- Records
- Report and photos after the visit
- Quote
- A fixed price before any work starts
- When we work
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Checked
- 30 October 2026
Looking after it afterwards
Good habits slow the build-up between visits. Our tips:
- Plan the next inspection before the last report gets filed away
- Flag stale or damp smells in the supply air
- Don’t store bins or materials near the intake
- Stick to the filter change plan
When we’ve closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
How the visit works
Your trading hours come first. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. When the team arrives, the work area is protected and the relevant equipment is switched off to cool, and the job takes anything from half a day for one small unit to several shifts for a plant room full of them. Most London sites can’t stop for the day, so work in St Paul's Cray is normally done overnight, early in the morning or at weekends.
- We survey the unit from photos or on site and agree what’s included.
- The unit is shut down with your site team and the area protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- We clean out the drain tray and make sure it drains.
- You get a TR19® certificate and a photo report.
Getting ready for the visit
- Mention any parking or loading restrictions
- Make sure equipment near the work can be switched off and left to cool
- Move anything stored near the system
How to get a quote
Quotes are quick. Call or email with a few details and you’ll typically have a fixed price within one working day. If we need to see the system first, we book a survey around your hours.
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Part by part
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.
Fans and fan sections
The fan moves all of the unit’s air, so dirt on it gets spread around. We clean the impeller, housing and surrounding section.
What affects the cost of AHU cleaning
Sites vary more than people expect. The main factors:
- One-off work versus a regular cycle
- The condition we find in the survey
- Where the site is and how we reach it
- Working hours and out-of-hours timing
Kitchens, offices, schools and hospitals are all priced the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we’ll explain each part.
What we need to know
Photos let us diagnose from a distance. The most useful are:
- The site address and the type of premises
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Photos showing the whole system and its surroundings
- The paperwork from the last visit, if you have it
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in pictures, get a survey first. Either way, the quote is fixed before any work is booked.
Why it’s worth doing now in St Paul's Cray
When the unit is clean, less dirt reaches the ducts, so the whole system stays cleaner for longer. It also means the next inspection has less to find. Planning ahead in St Paul's Cray lets you pick a quiet night rather than lose a busy one.
Combining work into one visit or one programme can make for a more efficient booking. Mention every system or site you need covered and we will price it together.
Why book with us
- Trading since 2009
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Every visit written up, with pictures
- Full insurance on every job
Take a look at our cost guide or how to check a contractor.
Questions from St Paul's Cray
Do you clean school ventilation in St Paul's Cray in the holidays?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 9 schools and colleges with food registrations within roughly a mile and a half of St Paul's Cray. Send us your term dates when you phone us on 0345 646 2711, or email photos, and we’ll fit the work in.
Does London parking affect a job in St Paul's Cray?
We plan it in advance, so let us know about loading bays, permits and access rules at the building. Night visits tend to make loading easier on London streets.
When should our AHU next be cleaned?
It depends on the unit, the filters and how the building is used. Inspection tells you when cleaning is needed, and we’ll suggest an interval after the first clean.
What do you do with what you remove?
It’s contained and taken away. We collect grease, debris and waste water as we go, so it doesn’t spread.
Do you work in St Paul's Cray?
Yes. Our area takes in London and the counties of South East England, St Paul's Cray included.
Can you clean the ducts connected to the AHU?
Yes. Ductwork is cleaned through access panels, and any sections we can’t reach are noted in the report, and new panels can be fitted.
Does the AHU have to be shut down for cleaning?
Yes. We can’t clean a running unit, so it’s switched off and made safe first. The shutdown is planned with whoever runs the building.
Which parts of an air handling unit do you clean?
All the internal parts the air touches, from the intake and filters through the coils and fan to the outlet. The photo report shows each section before and after.
Places near St Paul's Cray
What else we do in St Paul's Cray
AHU cleaning around St Paul's Cray
Food Standards Agency data includes about 9 schools, colleges and universities and about 19 care, childcare and hospital premises within 1.5 miles or so of the middle of St Paul's Cray. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. About 1.3 miles north of St Paul's Cray is Queen Mary's Hospital, the nearest hospital. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. Ventilation cleaning in London buildings is typically planned for evenings or weekends.
If you run an office near St Mary Cray station, its supply ductwork can gather dust for years before anyone looks inside. Hospitals such as Queen Mary's Hospital (about 1.3 miles north) show how much a building can rely on clean ventilation, and smaller healthcare sites near St Paul's Cray are no different. School buildings such as Leesons Primary School are typically done in the holidays, so classrooms are not disturbed.
St Paul's Cray is about 1 mile north of Orpington, in Greater London. For AHU cleaning in and around St Paul's Cray, please ring 0345 646 2711 or use the quote form for a fixed quote. Our area covers London and the South East, including St Paul's Cray. Our Greater London coverage runs to 764 places, St Paul's Cray among them. We also work in London, about 11 miles from St Paul's Cray.
AHU cleaning in BR5 and BR7 is surveyed, quoted and booked the same way as anywhere else. If you need AHU cleaning at premises on Main Road, Murray Road and Rushet Road or a nearby road, our technicians can take on the work. Neighbouring places we cover for AHU cleaning include St Mary Cray (1 mile south), Poverest (1 mile south), Derry Downs (1 mile south), Orpington (1 mile south) and Kevington (2 miles south-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).
Around St Paul's Cray
We work in commercial kitchens and buildings around Kemnal Technology College, The Blue Anchor Public House and Walsingham School and the streets around them. St Paul's Cray has its own railway station: St Mary Cray station. Well-known places in the area include Lullingstone Castle (4.8 miles south-east) and London Borough of Bromley Museum (1.5 miles south). Green spaces nearby include The Warren and Summer Hill.
What staff can safely do
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We’ll take a look and give you a fixed quote.
In-house cleaning and specialist cleaning do different jobs. A daily filter wipe and a weekly filter wash keep grease down at the front of the system, but they don’t reach the grease that builds up further in. That part needs specialist access and equipment.
Honest limits
AHU cleaning can’t fix everything, and we’d rather say so up front. It does not solve:
- Breakdowns that need a mechanical engineer
- Problems with the unit’s controls or sensors
- Damaged coils beyond cleaning
If you are not sure, just call 0345 646 2711 or use the quote form and we will give you a straight answer before booking.
Where we work
- Filter sections
- Drain trays
- Heating and cooling coils
- Dampers and louvres
- Supply and extract fans
- Internal panels