Greater London · Air handling unit cleaning
AHU Cleaning in Pratt's Bottom
AHU cleaning across Pratt's Bottom and nearby, booked around your opening hours and signed off in writing with pictures.
- Intake sections clogged with outdoor debris
- Dust-coated heating and cooling coils
- Air handling units with blocked filters
Fixed quotes for AHU cleaning in Pratt's Bottom
Before we fix a price, we need to know a few things. We check:
- Site rules, permits and inductions
- One-off work versus a regular cycle
- The times the site is available
- How big the system is
You will not find a price list here, because the cost depends on the site in front of us. Call for a fixed quote, and we’ll talk you through it.
Asking for a quote
A few details help us quote accurately. When you get in touch, it helps to send:
- Photos showing the whole system and its surroundings
- The site address and the type of premises
- When the site is open and when it’s quiet
- Problems your staff have spotted
For AHU cleaning in Pratt's Bottom, ring 0345 646 2711 or drop us a line. Tell us what kind of premises it is and when it’s open, plus pictures or the previous report if they’re to hand. A fixed quote normally follows within one working day.
AHU cleaning for kitchens and businesses in Pratt's Bottom
All the building’s air passes through the fan, so dust on its blades and housing ends up in the airstream. We clean the fan section along with the rest of the unit, once the unit has been shut down and isolated. Typical jobs include debris and leaves in the fresh air intake and filters that are clogged or overdue, on filter sections, heating and cooling coils and dampers and louvres.
London buildings tend to keep their plant on the roof or below ground, so work in Pratt's Bottom is often done in the evening or at weekends. Parking and loading are agreed with the building in advance.
Think of the report as the system’s health record: dated, with pictures, and showing what was done. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal and sits alongside the report.
- Location
- Pratt's Bottom (BR6, TN14)
- Region
- Greater London
- Paperwork
- Written report with pictures
- Price
- A fixed price before we start
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
What your team can do, and what needs us
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings need training, the right equipment and safe access. That is our job.
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
Questions from Pratt's Bottom
Can you work in Pratt's Bottom outside opening hours?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Let us know the hours you’re closed and we will book within them.
Is parking a problem for work in Pratt's Bottom?
Parking and loading in London need planning, so tell us about bays, permits and building rules when you book. Night visits tend to make loading easier on London streets.
Do you have insurance?
Yes. Duct Doctor is fully insured, and the details are available on request.
Can you look after several sites?
Yes. Tell us the addresses and what each needs and we will quote them together.
Is a quote from pictures possible?
Yes, where the pictures show enough. If not, a site survey comes first, then a fixed quote.
Do you survey before quoting?
Yes, always. We diagnose before we treat: the survey tells us what the system needs and how to reach it, and the quote is based on that.
Is Pratt's Bottom in your area?
Yes. Our area takes in London and the counties of South East England, Pratt's Bottom included.
What do you do with what you remove?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on, so it doesn’t spread.
Keeping the system healthy
After the visit, a few habits help the work last:
- Flag stale or damp smells in the supply air
- Make sure the unit’s access doors open easily
- Clear leaves and litter away from the intake
- Keep filter changes on time and recorded
You receive a TR19® certificate and a photo report after the clean. They belong in the plant or maintenance log.
Keep the area around the intake clear. What’s near the intake ends up in the unit.
What AHU cleaning looks like in Pratt's Bottom
The FSA’s food hygiene register lists about 3 schools, colleges and universities and about 3 care, childcare and hospital premises with registered kitchens or food service in Pratt's Bottom and the streets around it, up to about 1.5 miles out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. The nearest hospital to Pratt's Bottom is Orpington Hospital, about 1.6 miles north-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. Getting kit to a London plant room typically means lifts, stairs and an agreed loading slot.
If you manage a school such as Pratts Bottom Primary School, ventilation cleaning is best booked for the holidays. Workplaces around Knockholt station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts. Hospitals such as Orpington Hospital (about 1.6 miles north-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Pratt's Bottom are no different.
Pratt's Bottom is about 3 miles south of Orpington, in Greater London. From the centre of Pratt's Bottom to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. Our area takes in 764 places across Greater London, from busy centres to quieter spots. There’s also a page for London, roughly 14 miles from Pratt's Bottom.
We cover every part of the BR6 and TN14 postcode area for AHU cleaning and the roads nearby. Streets in the area include Orchard Road, Runciman Close and Downs View Close, all of which we cover for AHU cleaning. We also cover the places around Pratt's Bottom: Halstead (1 mile south-east), Chelsfield (1 mile north-east), Bopeep (1 mile north-east), Badgers Mount (1 mile east) and Maypole (1 mile north-east). Larger places within reach include London (14 miles north-west), Shoreditch (15 miles north-west), Whitechapel (14 miles north-west), Stockwell (13 miles north-west), Orpington (3 miles north) and Wimbledon (15 miles west).
Near you in Pratt's Bottom
Locally, jobs take us to businesses close to Hewitt's Chalk Bank and Green Street Green Primary School and the streets around them. The closest station to Pratt's Bottom is Knockholt station, about 0.8 miles east. Well-known places in the area include Crofton Roman Villa (2.4 miles north-west) and Lullingstone Castle (3.8 miles east). Open spaces near Pratt's Bottom include Betsom's Hill and Downe Bank Nature Reserve.
For landlords and multi-site operators
Whether it’s one building or many, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Every building has its own written report, so each one has its own record.
Nearby places to Pratt's Bottom
Also in Pratt's Bottom
What we do, step by step
Everything the job needs comes with us, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. On site, the work takes from a few hours for a compact unit to a day or more for a large one. Night and weekend working is normal for us in London, and a site in Pratt's Bottom is no exception.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- We arrange the shutdown with your staff and sheet the area.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- We close up the unit and send the certificate and before and after photos.
How to prepare
- Clear the space around the work
- Let us know when the site is closed or quiet
- Make sure equipment near the work can be switched off and left to cool
How to get a quote
Getting a quote does not take long. Send a few details and photos, and we normally reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Read more
How the job changes from site to site
Drain trays
Drain trays can rust and leak over time. We record their condition with photos so repairs can be planned.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
What AHU cleaning cannot fix
To be straight with you, some problems need a different fix:
- Airflow problems caused by the system’s design
- Dirty ducts beyond the unit itself
- Mechanical faults with motors, belts or bearings
If you are not sure, just ring 0345 646 2711 or use the quote form and we’ll give you a straight answer before booking.
What we work on in Pratt's Bottom
- Heating and cooling coils
- Supply and extract fans
- Filter sections
- Internal panels
- Dampers and louvres
- Drain trays