Kent · Air handling unit cleaning
AHU Cleaning in Stonehill Green
AHU cleaning for businesses, landlords and public buildings in Stonehill Green. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Blocked condensate drains and slimy trays
- Leaves and litter drawn into the unit
- Odours coming through the supply air
When it’s something else
It’s worth knowing the limits before booking:
- Ventilation that was badly designed in the first place
- Problems with the unit’s controls or sensors
- Faulty motors, drives or bearings
If in doubt, phone us on 0345 646 2711, or email photos and we will say what we think.
Parts of the system we cover
- Internal panels
- Drain trays
- Supply and extract fans
- Heating and cooling coils
- Filter sections
- Dampers and louvres
AHU cleaning in Stonehill Green
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. Typical jobs include drain trays holding standing water and leaves and litter drawn into the unit, across drain trays, dampers and louvres and filter sections.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
The report is your system’s health record: a dated account with pictures of everything we did. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal and sits alongside the report.
- Place
- Stonehill Green (DA2)
- Region
- Kent
- Paperwork
- Photo report after each visit
- Quote
- Fixed quote, typically within a working day
- When we work
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Fixed quotes for AHU cleaning in Stonehill Green
We don’t publish a price list, because sites vary so much. The quote depends on:
- Access, including roofs, risers and ceiling voids
- Whether it’s a one-off visit or part of a schedule
- The times the site is available
- Where the site is and how we reach it
No two sites are the same, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all play a part.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in touch, it helps to send:
- The paperwork from the last visit, if you have it
- Photos showing the whole system and its surroundings
- Any access panels or hatches you can see
- The site address and the type of premises
Quoting starts with a diagnosis, either from photos and details you send or from a site visit. Then we send a fixed price, before we start.
What happens on the day
At the end of the visit, someone from your team can look over the work with us. Anything we couldn’t reach or that needs attention is pointed out there and then, and it goes on the report too. The visit takes one overnight shift for many single units, with bigger plant phased. If the van will struggle with a lane or gateway near Stonehill Green, let us know and we’ll plan around it.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- The unit is shut down with your site team and the area 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.
Getting ready for the visit
- Plan for cooking equipment or plant to be off before we arrive
- Let us know about permits to work or site inductions
- Mention any parking or loading restrictions
Ask for a quote
Want a quote for AHU cleaning? Please call us on 0345 646 2711, or send details by email and tell us about the site. We will talk you through the work and give you a fixed quote before anything is booked.
Advice
What the work involves, part by part
Heating and cooling coils
Dirt on a coil slows the air and makes it harder for the coil to heat or cool. A clean gets air moving through the coil properly again.
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. We check them, and clean or change them as agreed in the quote, and clean the filter housing.
AHU cleaning around Stonehill Green
The FSA’s food hygiene register lists about 7 schools, colleges and universities and about 16 hospitals, care homes and childcare premises with registered kitchens or food service in Stonehill Green and the streets around it, up to about 1.5 miles out. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. About 13 miles out from central London, Stonehill Green is part of the South East area we work across. Evening, overnight and weekend visits are all possible. For Stonehill Green, the closest hospital is Queen Mary's Hospital, roughly 2.8 miles west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Queen Mary's Hospital, about 2.8 miles west, is the nearest hospital to Stonehill Green, and healthcare sites of every size need their supply air kept clean.
Stonehill Green is about 3 miles south-east of Sidcup, in Kent. Wherever you are in the DA2 postcode area, we can carry out AHU cleaning at your premises. 922 places in Kent are on our list, from busy centres to quieter spots. For sites nearby, see our London page (13 miles or so).
Our technicians cover all of the DA2 postcode area for AHU cleaning and the streets around it. We also cover the places around Stonehill Green: Puddledock (1 mile north-east), Hextable (1 mile east), Joyden's Wood (1 mile north), Hockenden (1 mile south-west) and Upper Ruxley (1 mile west). Further out, we also cover Dartford (3 miles north-east), Sevenoaks (9 miles south), Gravesend (9 miles east), Northfleet (8 miles east), Kings Hill (14 miles south-east) and Swanscombe (6 miles north-east).
Landmarks near Stonehill Green
Locally, jobs take us to businesses close to The Ship pub, Hextable Primary School and Dartford Heath, among other places. The nearest railway station is Swanley station, about 1.4 miles south. A little further out are Queen Mary's Hospital (2.8 miles west) and Eynsford Castle (3.6 miles south-east). The countryside around Stonehill Green includes Summer Hill and The Warren.
FAQs for Stonehill Green
Do you do school ventilation cleaning in Stonehill Green in the summer holidays?
Yes. Half-terms and the summer break are the natural time for school work. Around Stonehill Green, the Food Standards Agency lists about 7 schools and colleges with registered kitchens within a mile and a half or so. You can phone us on 0345 646 2711, or send details by email with the dates the site is empty.
Do you work overnight in Stonehill Green?
Yes, nights and weekends are routine for us. The work in Stonehill Green can fit around your hours. Let us know the hours you’re closed and we’ll book within them.
Do you repair air handling units?
AHU cleaning is what we offer here, not mechanical repairs. Any faults we notice are recorded so your maintenance contractor can deal with it.
Can you come out in an emergency?
Yes. Our emergency line runs 24/7 for anything that cannot wait until a planned visit. Call us any time and explain what’s happened.
Will the ventilation be off while you clean?
Yes, for the time we are working on it. Out-of-hours work is available to keep disruption down.
What do you do to protect the area?
With sheeting and covers, before anything else happens. We keep the work contained and leave the area clean.
Can you quote from photos?
Often, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Larger or hidden systems need a survey on site first.
Is there a survey before the work?
Yes. Every job is surveyed first, either from pictures and details you send or on a site visit. Then you get a fixed quote.
Landlords, agents and facilities managers
Keeping records across a portfolio is half the battle. Each visit ends with a dated report and pictures, so you can show an insurer or inspector what was done at each site.
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements and we will come back with a fixed quote.
Places near Stonehill Green
What else we do in Stonehill Green
When to call us in Stonehill Green
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
Signs it’s time to call us include:
- Dirty fans and fan housings
- Plant that needs cleaning after a refit
- Intake sections clogged with outdoor debris
- Dirty filters cutting the airflow
For schools like Hextable School, the holidays are the usual time to inspect and clean ventilation.
What your quote should include
- Whether they’re fully insured
- Whether the quote is based on a survey or photos
- When the next visit should be, and why
- If the quote is a fixed price or an estimate
Between visits
Aftercare is simple, and it makes the next visit easier:
- Flag stale or damp smells in the supply air
- Clear leaves and litter away from the intake
- Watch for drips or damp patches near the plant
- Look at the condensate drain whenever the unit is serviced
Keep filter changes on schedule between cleans, as that does more than anything to keep the unit clean. Log every change so it’s easy to see when the next is due.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.