Greater London · Air handling unit cleaning
AHU Cleaning in South Croydon
Need AHU cleaning in South Croydon? We diagnose first, fix the price and book the work around your hours, finishing with a written report and pictures.
- Debris and leaves in the fresh air intake
- Dust-coated heating and cooling coils
- Air handling units never cleaned inside
South Croydon questions
Can you clean school ventilation in South Croydon during the holidays?
Yes. Half-terms and the summer break are the natural time for school work. There are about 27 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of South Croydon. Booking early in the term gives the best choice of holiday dates.
Can parking be tricky for a job in South Croydon?
Tell us where a van can stop near your site in South Croydon, and about any building rules on loading. Much of our London work is done overnight, which helps.
Are you fully insured?
Yes. Duct Doctor is fully insured, and we can share the details when you need them.
How much does AHU cleaning cost in South Croydon?
The cost depends on the size of the system, its condition, access and timing. Ask us for a fixed quote, normally ready within one working day.
Is South Croydon in your area?
Yes. We work in South Croydon and across Greater London, within our South East and London area. To book, give us a ring on 0345 646 2711, or send details by email.
Can you look after several sites?
Yes. Our area covers London and the South East, so we can schedule a run of sites on one programme. Every site has its own report.
Will the ventilation be off while you clean?
Yes. Cleaning needs the unit off and isolated, so we plan it for a time that suits the building.
How long will the unit be out of action?
Typically the clean takes half a day to a full day per unit, with large plant planned over several shifts. We plan the shutdown around that, including evenings or weekends.
AHU cleaning for kitchens and businesses in South Croydon
Every supply and extract system relies on the air handling unit at its centre: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Anything that collects inside the unit can end up in the rooms it serves, so cleaning the unit matters as much as cleaning the ducts. The work covers internal panels, filter sections and heating and cooling coils, and common reasons people get in touch are intake sections clogged with outdoor debris and rooms that smell stuffy when the system runs.
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 South Croydon.
The sign-off is always in writing: a written report, dated and illustrated with pictures, 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
- South Croydon (CR2, CR8, CR0)
- Wider area
- Greater London
- Records
- Written report with photos
- Quote
- A fixed quote up front
- Working hours
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What affects the quote in South Croydon
The price is fixed before any work begins. It takes into account:
- When the work can happen, such as evenings, overnight or weekends
- The size of the system
- How easy every part is to reach
- Parking and loading at the site
We do not list prices on the website, because the cost depends on the site in front of us. Call for a fixed quote, and we will explain what it covers.
Asking for a quote
To help us quote quickly, please include:
- When the site is open and when it’s quiet
- Close-ups of filters, grilles, hatches or access panels
- Where the site is and what kind of site it is
- A few general shots of the system
There’s no standard price list, because no two systems are the same. Instead, we look at your site first, from pictures or a survey, and then send you a fixed quote. To start, phone us on 0345 646 2711, or send details by email.
Places near South Croydon
More services for South Croydon
Managing agents and facilities teams in South Croydon
We also work for facilities teams across offices, schools and healthcare in South Croydon and across Greater London. Larger estates can be phased building by building to keep disruption down.
Managing agents often deal with us directly. Send the address, what’s needed and how access works, and we’ll send a fixed quote.
What staff can safely do
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, next to our reports.
What AHU cleaning looks like in South Croydon
Food Standards Agency records list about 27 schools, colleges and universities, about 100 caring premises (care homes, nurseries and hospitals) and about 11 hotels, B&Bs and guest houses registered as food businesses within 1.5 miles or so of the middle of South Croydon. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. London plant rooms are often on roofs or in basements reached through occupied floors. South Croydon’s nearest hospital, Purley War Memorial Hospital, is about 1.2 miles south-west. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Classrooms and halls at schools such as Purley Oaks Primary School are easiest to work in when pupils are away. For workplaces around Sanderstead station with mechanical ventilation, cleaning can be done in the evening or at weekends. Healthcare buildings such as Purley War Memorial Hospital, about 1.2 miles south-west, depend on their ventilation; if you manage a surgery, clinic or care home near South Croydon, yours matters too.
South Croydon is about 1 mile south of Croydon, in Greater London. Anywhere in CR2, we can carry out AHU cleaning at your premises. We cover 764 places across Greater London, from busy centres to quieter spots. London is in our area too, around 10 miles away.
We work across CR2, CR8 and CR0 for AHU cleaning and the roads nearby. You will find streets such as Edgar Road, Bynes Road and Grange Road, and we cover them all for AHU cleaning. Neighbouring places we cover for AHU cleaning include Croydon (1 mile north), Coombe (1 mile north-east), Sanderstead (1 mile south-east), Riddlesdown (2 miles south) and Selsdon (2 miles east). Further out, we also cover London (10 miles north), City of Westminster (11 miles north), Marylebone (12 miles north), Kensington (11 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
What’s near South Croydon
In South Croydon, that means kitchens and buildings near The Purley Arms, Harris Academy Purley and Duppas Hill, among other places. South Croydon has its own railway station: Sanderstead station. Other landmarks nearby include Purley War Memorial Hospital (1.2 miles south-west) and Croydon Airport Visitor Centre (1 mile west). For a walk, there’s Roundshaw Downs and Duppas Hill.
What we do, step by step
We work around your opening hours, not the other way round. 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 work takes from a few hours for a compact unit to a day or more for a large one. Managed blocks in London often need contractors booked in ahead, and we’re happy to deal with the agent directly for a site in South Croydon.
- We start with a survey of the unit and a fixed quote for the work.
- We arrange the shutdown with your staff and sheet the area.
- 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.
Preparing for the visit
- Tell us where we can park and unload
- Tell us about site rules, permits or sign-in
- Have your last certificate or report to hand
How to get a quote
For a fixed quote, give us a ring on 0345 646 2711, or send details by email and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. You’ll usually have a quote within one working day.
Advice
What AHU cleaning can’t fix
Not every problem is solved by AHU cleaning, and we’ll tell you before work begins. It will not put right:
- A system that’s undersized for the building
- Mechanical faults with motors, belts or bearings
- Controls and BMS settings that run the unit
If you are not sure, just call us on 0345 646 2711 or drop us a line and we will give you a straight answer before booking.
Where we work
- Filter sections
- Internal panels
- Supply and extract fans
- Heating and cooling coils
- Drain trays
- Dampers and louvres
Aftercare tips
So the system stays in good health:
- Do not ignore odours coming through the grilles
- Diary the inspection date recommended in the report
- Watch for drips or damp patches near the plant
- Check the drain tray is emptying during routine visits
Stick to the filter change schedule, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.
What the work involves, part by part
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. We clean the impeller, housing and surrounding section.
Internal casing and panels
Dust settles on every internal surface of the unit. We clean each section from intake to discharge.