Greater London · Air handling unit cleaning
Lewisham AHU cleaning
One call covers cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Lewisham, from survey to sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Condensate trays that will not empty
- Dirty coils holding back the airflow
- Dust built up on fan impellers
The process
We’re used to working while the site is closed. Evenings, nights and weekends are when much of our work happens, so a kitchen or building can carry on as usual the next day. The visit itself takes anything from half a day for one small unit to several shifts for a plant room full of them. In Lewisham, as across London, we typically work overnight or at weekends and hand the site back ready to open.
- First we agree when the unit can be switched off, including evenings or weekends.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- We take after photos and issue the certificate and report.
How to prepare
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Let us know about parking and loading
- Arrange a key holder or contact on site
Ask for a quote
Want a quote for AHU cleaning? Please call us on 0345 646 2711, or send details by email with a few details about the site. We’ll explain what we’d do and send a fixed quote before you commit to anything.
Advice
AHU cleaning for kitchens and businesses in Lewisham
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, right in the path of the air going into the building. Clearing and cleaning the tray is central to every AHU clean. If you have dust built up on fan impellers and drain trays holding standing water, we can put it right, from drain trays, filter sections and supply and extract fans onwards.
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 Lewisham, dust and debris build up in the units and ductwork over time, which is what TR19® Air cleaning deals with.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Place
- Lewisham (SE13, SE8, SE6)
- Wider area
- Greater London
- Paperwork
- Written report with photos
- Price
- Fixed quote, typically within a working day
- Hours
- Out of hours as standard, 24/7 emergency line
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
What we are called out for in Lewisham
Most units live out of sight on roofs, in plant rooms or in ceiling voids, so they’re easy to forget about. Months can pass without anyone looking inside.
Keep an eye out for these warning signs:
- Filters that are clogged or overdue
- Plant that needs cleaning after a refit
- Intake sections clogged with outdoor debris
- Dirty fans and fan housings
Healthcare buildings such as University Hospital Lewisham, about 0.6 miles south-west, depend on their ventilation; if you manage a surgery, clinic or care home near Lewisham, yours matters too.
Comparing quotes
- Whether a written report and photos are included
- What insurance they carry
- Whether VAT is included
- Proof of accreditation you can verify
In-house cleaning or a specialist?
If your staff spot something between visits, like drips, unusual noise, smells or damaged filters, they should report it rather than try to fix it. We can diagnose it and quote.
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
Ventilation in Lewisham buildings
The FSA’s food hygiene register lists about 48 schools, colleges and universities, about 93 caring premises (care homes, nurseries and hospitals) and about 11 hotels, B&Bs and guest houses with registered kitchens or food service in Lewisham and the streets around it, up to about 1.5 miles out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. University Hospital Lewisham is the nearest hospital, about 0.6 miles south-west of Lewisham. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. In London, ventilation plant is often on the roof or below ground, so the work is normally done out of hours.
Workplaces around Lewisham station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. Wherever a school like St Saviour's Catholic Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time.
Lewisham is about 3 miles west of Eltham, in Greater London. Wherever you are in the SE13 postcode area, we can carry out AHU cleaning at your premises. We cover 764 places across Greater London, from busy centres to quieter spots.
We cover every part of SE13, SE8 and SE6 for AHU cleaning and the roads nearby. You’ll find streets such as Station Road, Lewisham High Street and Lewis Grove, and we cover them all for AHU cleaning. With the B220 close by, Lewisham is easy for our technicians to reach for AHU cleaning. Nearby, we also carry out AHU cleaning in Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). We also work in nearby towns such as London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Landmarks near Lewisham
Around Lewisham, our work takes us to kitchens and buildings near St Joseph's Academy, Ladywell Fields and The Watch House, among other places. Lewisham has its own railway station: Lewisham station. Nearby you’ll also find Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). Green spaces nearby include Knight's Hill and Brookmill Road Local Nature Reserve.
What happens if it’s left?
Facilities teams are often asked for evidence that the ventilation is looked after. A TR19® certificate and photo report give you that, ready to show anyone who asks. Every month a London system goes without attention adds to what has to be done later.
Several systems or sites on one quote often makes better use of the time. Tell us about everything you’d like looked at and we’ll price it together.
What you get with us
- Fixed quotes, usually within one working day
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Ventilation hygiene specialists since 2009
- CHAS, SafeContractor and ISO 9001
Take a look at how cleaning jobs are priced and our accreditations.
Between visits
To keep the system working properly between visits:
- Store the TR19 paperwork where auditors can find it
- Report stiff or damaged access doors
- Check the drain tray is emptying during routine visits
- Book the next check in line with the report
Restart the unit with your site team or maintenance contractor once we’ve finished. Check the drain tray is emptying over the first few days to confirm water is draining away.
Make the drain tray part of every maintenance visit. Catching a slow drain early stops standing water building up.
Towns and villages near Lewisham
Also in Lewisham
What the work involves, part by part
Heating and cooling coils
Coil fins are close together and catch the dust the filters miss. We clean them with care so the fins are not damaged.
Drain trays
Condensate from the coil drips into a tray beneath it. Standing water and slime are removed and the outlet is checked.
FAQs for Lewisham
Can a school’s ventilation in Lewisham be done out of term time?
Yes. The holidays are the usual time for school work. The FSA’s register shows about 48 schools and colleges with food registrations within roughly a mile and a half of Lewisham. Send us your term dates when you give us a ring on 0345 646 2711 or use the quote form, and we’ll fit the work in.
Can parking be tricky for a job in Lewisham?
London parking can be tight, so details of loading bays and permits help. Where restrictions apply in the day, an evening or overnight visit typically gets round them.
How often do AHUs need cleaning?
It depends on the unit, the filters and how the building is used. Regular inspection shows when it’s due, and we will suggest an interval after the first clean.
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, and the quote follows that.
Will you repair the fan or motor?
Mechanical repairs to the unit are for your HVAC maintenance contractor. We’ll flag anything we notice during the clean.
Do you offer maintenance contracts?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. Each report recommends when the next visit should be.
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 does not spread.
What happens if you can’t reach some of it?
They’re listed in the report, never skipped quietly. You will know exactly which parts weren’t reached and why, and we can quote to improve the access.
Fixed quotes for AHU cleaning in Lewisham
Some jobs are bigger than they look, and some smaller. The main factors:
- When the work can happen, such as evenings, overnight or weekends
- The condition we find in the survey
- Whether it’s a one-off visit or part of a schedule
- Site requirements such as sign-in and permits
What you pay reflects the actual work. That is why every job is surveyed first, and the price is agreed before any work starts.
Asking for a quote
We can often survey from photos. Try to include:
- Detail shots of panels, filters and grilles
- Wide pictures of the system and the area around it
- Any previous report or certificate
- The times we could work without disrupting the site
Some systems can be priced from photos; others need a survey. 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.