Greater London · Air handling unit cleaning
Air handling unit cleaning in South Street, Greater London
AHU cleaning for commercial sites in South Street and across Greater London. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Filters that are clogged or overdue
- Leaves and litter drawn into the unit
- Air handling units never cleaned inside
How we handle AHU cleaning in South Street
Coils are where a lot of the dirt ends up. Dirt on the fins holds back air and makes the unit work harder to do the same job. We clean coils with methods suited to their condition, taking care not to damage the fins. Common call-outs are for air handling units with blocked filters and blocked condensate drains and slimy trays, across supply and extract fans, drain trays and dampers and louvres.
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 South Street, dust and debris build up in the units and ductwork over time.
The report is your system’s health record: a dated account with photos of everything we did. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Where
- South Street (TN16)
- Wider area
- Greater London
- Reporting
- Report and pictures after the visit
- Price
- A fixed quote up front
- When we work
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
What the work involves, part by part
Drain trays
A tray that doesn’t drain becomes a pool of stagnant water in the airstream. We clean it and note if the slope or the drain needs attention.
Heating and cooling coils
Cooling coils stay damp in use, so dirt on them can turn sticky. We clean the coil and the tray beneath it together.
How the visit works
Before we leave, we walk the area with whoever is on site. Anything we couldn’t reach or that needs attention is pointed out there and then, and it goes on the report too. All told, the work takes anything from half a day for one small unit to several shifts for a plant room full of them. Many London buildings have a managing agent, a security desk or a permit-to-work system, so tell us who to contact in South Street.
- 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.
- You get a TR19® certificate and a photo report.
Before we arrive
- Arrange a key holder or contact on site
- Dig out any earlier paperwork for the system
- Move anything stored near the system
Ask for a quote
To help us quote: the address, the type of site and when it’s open, a few photos and the last certificate or report, if there is one. Once you have those, call us on 0345 646 2711, or email photos.
Related advice
Your questions about AHU cleaning in South Street
Do you cover South Street for AHU cleaning?
Yes, South Street is covered. Get in touch with the details and we’ll arrange a survey.
Can the work in South Street be done at night or at weekends?
Yes, out-of-hours work is a big part of what we do. It means the site in South Street keeps running as normal. Just call us on 0345 646 2711, or email photos with your opening times and we will plan around them.
How far ahead should we book?
For planned work, earlier is better, especially if the next clean or test is due soon. For emergencies, we take calls 24/7.
What about areas you can’t get to?
They’re listed in the report, never skipped quietly. You’ll know exactly which parts weren’t reached and why, along with a quote to put access in.
How do you protect the area?
We cover floors and nearby surfaces with sheeting before any work starts, and anything we remove is contained. Before we leave, we tidy up and clean down.
Will we get paperwork for the AHU clean?
Yes. Every clean comes with a TR19® certificate and a photo report. They’re worth keeping with the plant records.
Which accreditations do you hold?
We hold CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Do you look at the system first?
Yes. Every job is surveyed first, either from photos and details you send or on a site visit. Then you get a fixed quote.
Looking after it afterwards
Think of this as the after-treatment advice, in brief:
- Check the drain tray is emptying during routine visits
- Note any water around the unit or leaks below it
- Diary the inspection date recommended in the report
- Report stiff or damaged access doors
When we’ve closed the unit up, it can be restarted with your site team. Check the drain tray is emptying over the first few days to make sure it stays clear.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.
South Street buildings and their air
Food Standards Agency records list about 5 hospitals, care homes and childcare premises registered as food businesses within roughly a mile and a half of the centre of South Street. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. About 3.2 miles south of South Street is Tandridge Priory, the nearest hospital. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. Ventilation cleaning in London buildings is normally planned for evenings or weekends.
Classrooms and halls at schools such as Charles Darwin School are easiest to work in when pupils are away. Healthcare buildings such as Tandridge Priory, about 3.2 miles south, depend on their ventilation; if you manage a surgery, clinic or care home near South Street, yours matters too.
South Street is about 4 miles north-east of Oxted, in Greater London. Every kind of commercial site in South Street, we can take on AHU cleaning. We can work out of hours so the site keeps running. Across Greater London, we cover 764 places, and South Street is one of them. You can also see our page for London, roughly 15 miles from South Street.
AHU cleaning in TN16 follows the same survey, fixed quote and written report as everywhere else we cover. Close by, we work in Tatsfield (1 mile west), Force Green (2 miles south-east), Titsey (2 miles south-west), Westerham (2 miles south-east) and Moorhouse Bank (3 miles south). Within a short drive, we also cover London (15 miles north-west), Stockwell (14 miles north-west), Orpington (6 miles north), Wimbledon (14 miles north-west), Kennington (15 miles north-west) and New Cross (13 miles north).
Around South Street
For rail, the closest station is Oxted station, about 3.7 miles south-west of the centre. Other landmarks nearby include Tandridge Priory (3.2 miles south). Open spaces near South Street include West Kent Golf Course nature reserve and Betsom's Hill.
What staff can safely do
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. That’s our job.
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
What affects the cost of AHU cleaning
A fixed price needs a few facts first. We look at:
- Whether we need access equipment or extra panels
- A single visit or a regular plan
- Working hours and out-of-hours timing
- Any permits to work or inductions
When the work has to happen, how we reach it and how big the site is can all change the price. We take each of them into account, and the price is fixed before we start.
What to send for a quote
What to send for a quote:
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- How we’d reach plant on a roof or in a plant room
- The postcode and the type of business
- The times we could work without disrupting the site
The quickest way to a quote is to send photos: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Add the site type and your opening hours, and many jobs can be priced from that alone.
Leave it or put it right?
A clean unit feeds cleaner air into the ductwork, so the ducts and grilles stay cleaner between cleans. That makes the next inspection of a building in South Street simpler. Leaving it on a busy London site only adds to the work.
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, which can make the next visit longer. If you are unsure, call 0345 646 2711 or send us an email for straight advice and a fixed quote.
Why us?
- Work around your opening hours, with 24/7 emergency cover
- Full insurance on every job
- Survey first, then a fixed quote
- Trading since 2009
Places near South Street
What else we do in South Street
What a clean won’t put right
An honest diagnosis matters more to us than a booking, so here’s what AHU cleaning won’t do:
- Building management system faults
- Mechanical faults with motors, belts or bearings
- The supply and extract ducts, quoted separately
Not sure which it is? You can ring 0345 646 2711 or use the quote form and we’ll tell you honestly.
What we work on in South Street
- Supply and extract fans
- Drain trays
- Dampers and louvres
- Heating and cooling coils
- Filter sections
- Internal panels