Kent · Air handling unit cleaning
AHU Cleaning in Stone Street
One call covers AHU cleaning in Stone Street: survey, fixed quote, work and sign-off. Fully insured, with CHAS, SafeContractor and ISO 9001.
- Air handling units never cleaned inside
- Leaves and litter drawn into the unit
- Air handling units due a clean after building work
What the work involves, part by part
Filters
Filters are the first line of defence in the unit. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. We clean the intake and first stage of filters along with the rest.
How we handle AHU cleaning in Stone Street
An air handling unit is the heart of a building’s ventilation: air is pulled in, filtered, conditioned and sent out through the ducts. Whatever builds up inside it travels with that air, so cleaning the unit matters as much as cleaning the ducts. Typical jobs include units needing a clean before a new tenant or handover and odours coming through the supply air, across supply and extract fans, internal panels and dampers and louvres.
For a building in or near Stone Street, access is agreed in advance and the visit is planned around the journey.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Location
- Stone Street (TN15)
- Wider area
- Kent
- Records
- Written report with pictures
- Quotes
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Call
- 0345 646 2711
- Reviewed
- 30 October 2026
How the visit works
The first job on site is protection: sheeting goes over floors and surfaces close to the work. Then we make the system safe and start. It takes from a few hours for a compact unit to a day or more for a large one, and the area is cleaned down before we leave. Rural roads and tight entrances are worth telling us about before a visit to Stone Street.
- We survey the unit from pictures or on site and agree what’s included.
- 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
- Allow time for equipment near the work to be turned off and cool down
- Clear loose items from the work area
- Let us know about parking and loading
Getting a quote
Quotes are quick. Send a few details and pictures, and we typically reply with a fixed quote within one working day. Where a survey is needed, we arrange a time that suits the site.
Read more
Why it’s worth doing now in Stone Street
Stuffy rooms and stale smells in a building in Stone Street can sometimes be traced back to the AHU. A clean tackles the source instead of masking it. Planning a trip to Stone Street ahead is easier for everyone than a rushed one.
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before any work starts.
Why us?
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- A written report with pictures after each visit
- Evenings, overnight and weekends, plus 24/7 emergency callout
- Ventilation hygiene specialists since 2009
See what affects the cost and our accreditations and certificates.
What your team can do, and what needs us
Away from the kitchen, the in-house job is mainly checking: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
Staff cleaning doesn’t replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you cannot see still need a specialist at the right interval.
Do you need AHU cleaning in Stone Street?
An AHU’s intake draws in outdoor air and everything in it: dust, pollen, leaves and debris. Most of it lands at the intake and the first stage of filters, and the finer material travels on.
Any of these means the system needs a check-up:
- Dirty filters cutting the airflow
- Intake sections clogged with outdoor debris
- Units needing a clean before a new tenant or handover
- Blocked condensate drains and slimy trays
If you manage a school such as St Lawrence Church of England Primary School, ventilation cleaning is best booked for the holidays.
What to look for in a quote
- If the quote is a fixed price or an estimate
- What hours they’ll be on site
- What happens if part of the system cannot be accessed
- Proof of insurance
Common questions in Stone Street
Is AHU cleaning available in Stone Street?
Yes, we work in Stone Street and the places around it. Get in touch with the details and we will arrange a survey.
Do you cover smaller places like Stone Street?
Yes, we work in villages as well as towns, and Stone Street is covered. Just mention lanes, gates or anything else about the site when you book.
What do you do to protect the area?
Floors and surfaces near the work are sheeted before we start, and waste is contained as we go. At the end, the area is cleaned down.
Which accreditations do you hold?
We hold CHAS, SafeContractor and ISO 9001, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
Is there a report after cleaning?
Yes. A TR19® certificate and photo report are sent after the clean, including anything we think needs attention.
How often should an air handling unit be cleaned?
It depends on the unit, the filters and how the building is used. Regular inspection shows when it’s due, and we’ll suggest an interval after the first clean.
Can you come out in an emergency?
Yes. There’s a 24/7 emergency line 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. The fan must be stopped and the unit isolated, so we plan it for a time that suits the building.
Between visits
Here’s the after-treatment advice, in brief:
- Stick to the filter change plan
- Keep the area around the fresh air intake clear
- Plan the next inspection before the last report gets filed away
- Flag stale or damp smells in the supply air
The report shows each section of the unit before and after, along with anything we couldn’t reach. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Don’t let leaves, litter or stored materials build up near the fresh air intake. What’s near the intake ends up in the unit.
Also near Stone Street
What else we do in Stone Street
What a clean will not put right
We’d rather tell you now than book work that will not help, so these are the things it will not cover:
- Damaged coils beyond cleaning
- Building management system faults
- Mechanical faults with motors, belts or bearings
If you’re not sure, just call 0345 646 2711 or use the quote form and we’ll give you a straight answer.
What the work covers
- Filter sections
- Internal panels
- Heating and cooling coils
- Drain trays
- Supply and extract fans
- Dampers and louvres
AHU cleaning in Stone Street: local notes
Stone Street, about 22 miles from central London, is within our usual area. Visits are booked around your hours, evenings and weekends included. The nearest hospital to Stone Street is Sevenoaks Hospital, about 2.8 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.
Hospitals such as Sevenoaks Hospital (about 2.8 miles north-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Stone Street are no different.
Stone Street is about 3 miles east of Sevenoaks, in Kent. We provide AHU cleaning for businesses, landlords and public buildings in Stone Street and the rest of Kent. Our Kent coverage runs to 922 places, Stone Street among them. There’s also a page for Maidstone, about 12 miles away.
Postcode districts we cover here for AHU cleaning: TN15. That includes premises on Church Road, Stone Street Road and Pond Lane and the roads around them. We also cover the places around Stone Street: Bitchet Green (1 mile south-west), Ivy Hatch (1 mile east), Styants Bottom (1 mile north), Godden Green (1 mile west) and Ightham (1 mile north-east). Larger places within reach include Maidstone (12 miles east), Dartford (12 miles north), Sevenoaks (3 miles west), Royal Tunbridge Wells (9 miles south), Gravesend (12 miles north-east) and Tonbridge (5 miles south).
What’s near Stone Street
Around Stone Street, our work takes us to kitchens and buildings near Sevenoaks Preparatory School, Ivy Hatch Nature Reserve and The Plough pub, among other places. The nearest railway station is Kemsing station, roughly 1.9 miles north. Nearby you will also find Ightham Court (2.2 miles north-east) and Sevenoaks Hospital (2.8 miles north-west). The countryside around Stone Street includes Dryhill Nature Reserve.