Kent · Air handling unit cleaning
AHU Cleaning in Cotman's Ash
AHU cleaning for commercial sites in Cotman's Ash and across Kent. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Odours coming through the supply air
- Air handling units with blocked filters
- Debris and leaves in the fresh air intake
Cotman's Ash questions
Can you get to a site in Cotman's Ash?
Yes, smaller places are covered as well as towns. Photos of the system and directions to the site help us plan the visit.
Can ventilation in schools around Cotman's Ash be cleaned out of term?
Yes, and it’s the easiest time to do it. Food Standards Agency records list about 4 schools, colleges and universities with registered kitchens within about a mile and a half of Cotman's Ash. Tell us your holiday dates and we will book the visit for when the site is empty.
Can one contract cover all our sites?
Yes. Send the list of sites and the work at each and we’ll quote them together.
Can you fix a faulty AHU?
We clean the unit and flag faults rather than repair them, with the details in the report.
Can you clean without disrupting the building?
Yes, wherever it helps the building. We plan the shutdown window with you.
When should our AHU next be cleaned?
Under TR19® Air, cleaning is led by inspection and risk rather than a set calendar. Each report suggests when the unit should next be looked at.
What do you do with what you remove?
Waste is contained during the work and removed when we leave, from grease and debris to used cleaning water. None of it is left on site.
How much does AHU cleaning cost?
Every site is different, so each gets its own fixed quote. For a quote, call us on 0345 646 2711 or send us an email with the site type, opening hours and a few pictures.
How we handle AHU cleaning in Cotman's Ash
Coils are where a lot of the dirt ends up. A coated coil restricts airflow and makes the unit work harder. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. The work covers filter sections, drain trays and heating and cooling coils, and common reasons people get in touch are stale or musty smells from the ventilation and leaves and litter drawn into the unit.
In a village or hamlet like Cotman's Ash, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
We have been trading since 2009, and we are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we’re fully insured.
- Place
- Cotman's Ash (TN15)
- Wider area
- Kent
- Records
- Photo report after every visit
- Quote
- A fixed price before work begins
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
What affects the cost of AHU cleaning
The quote reflects the site in front of us. We take into account:
- The size of the system
- A single visit or a regular plan
- Working hours and out-of-hours timing
- Site requirements such as sign-in and permits
Several systems or sites on one quote can make for a more efficient booking. Mention every system or site you need covered, and you will get one fixed quote.
What to send for a quote
A few details help us quote accurately. With your enquiry, please include:
- Any previous report or certificate
- Any access panels or hatches you can see
- Wide pictures of the system and the area around it
- Any symptoms, from odd noises to smells or leaks
Here’s what helps us quote: where the site is, what it is and its opening hours, a few photos and the last certificate or report, if there is one. Once you have those, call 0345 646 2711 or email us.
Common problems we fix in Cotman's Ash
Whatever surrounds a building in Cotman's Ash, the air drawn into its AHU carries dust, pollen and debris. The intake section and first filters take the brunt, and the finer material travels on.
What we are most often called out for:
- Debris and leaves in the fresh air intake
- Filters that are clogged or overdue
- Rooms that smell stuffy when the system runs
- Blocked condensate drains and slimy trays
For schools like Kemsing Primary School, the holidays are the usual time to inspect and clean ventilation.
Questions to ask before booking
- When they can work, and whether that’s outside your opening hours
- Exactly which parts of the system are covered
- How areas they can’t reach will be recorded
- When the next visit should be, and why
Towns and villages near Cotman's Ash
Also in Cotman's Ash
Keeping the system healthy
Aftercare is simple, and it makes the next visit easier:
- Do not ignore odours coming through the grilles
- Stick to the filter change plan
- Clear leaves and litter away from the intake
- Report water on the plant room floor
The ducts served by the unit may need attention too. Cleaning the unit and ducts together gives the best result, and we can survey both.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
Why deal with it now?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. A TR19® certificate and photo report give you that, for audits, tenants or your own peace of mind. In a place like Cotman's Ash, ductwork and fans are easy to forget until something goes wrong.
No two sites are the same, so each one gets its own fixed quote. The size of the job, how we reach it, its condition and the working hours all make a difference.
Why book with us
- Trading since 2009
- One number for every site across the South East and London
- Out-of-hours work and a 24/7 emergency line
- Fixed quotes, usually within one working day
Take a look at what affects the cost and our accreditations.
How the job changes from site to site
Fans and fan sections
The fan moves all of the unit’s air, so dirt on it gets spread around. We clean the impeller, housing and surrounding section.
Drain trays
Condensate from the coil drips into a tray beneath it. We clear standing water, clean out slime and check the outlet is draining.
What happens on the day
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool first, and floors and nearby surfaces are sheeted. On site, it takes one overnight shift for many single units, with bigger plant phased. We agree a date with you, plan the drive to Cotman's Ash and turn up when the site is quiet.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- 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.
- 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
- Dig out any earlier paperwork for the system
- Let us know about permits to work or site inductions
- Let us know how we reach the system, including roofs, risers and plant rooms
Get a fixed quote
For a fixed quote, call us on 0345 646 2711 or use the quote form 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 typically have a quote within one working day.
Related advice
Managing agents and facilities teams in Cotman's Ash
Multi-site operators often want one contractor and one number. We cover South East England and London, so visits at different addresses can be planned together and kept to a regular schedule.
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side and send the paperwork to whoever needs it.
AHU cleaning in Cotman's Ash: local notes
Food Standards Agency data includes about 4 schools, colleges and universities in and around Cotman's Ash, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. The nearest hospital to Cotman's Ash is Sevenoaks Hospital, about 2.8 miles south-west. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. At about 19 miles from central London, Cotman's Ash sits well inside the area we cover. A survey and a fixed quote come first, then the visit at a time that suits you.
Sevenoaks Hospital, about 2.8 miles south-west, is the nearest hospital to Cotman's Ash, and healthcare sites of every size need their supply air kept clean.
Cotman's Ash is about 3 miles north-east of Sevenoaks, in Kent. Across the TN15 area, we can carry out AHU cleaning at your premises. Cotman's Ash is one of 922 places in Kent we cover for AHU cleaning. You can also see our page for Maidstone, roughly 13 miles from Cotman's Ash.
Postcode districts we cover here for AHU cleaning: TN15. We also cover the places around Cotman's Ash: Woodlands (1 mile north-east), Heaverham (1 mile south-east), Knatts Valley (1 mile north), Romney Street (1 mile north-west) and Kemsing (1 mile south-west). We also work in nearby towns such as Maidstone (13 miles east), Dartford (9 miles north), Sevenoaks (3 miles south-west), Royal Tunbridge Wells (13 miles south), Gravesend (10 miles north-east) and Tonbridge (8 miles south).
What’s near Cotman's Ash
Typical jobs here are in premises near The Rising Sun pub and Kemsing Down, among other places. The nearest railway station is Kemsing station, roughly 1.4 miles south. A little further out are Kemsing Castle Bank (0.9 miles south-west) and Sevenoaks Hospital (2.8 miles south-west). Not far away are Dryhill Nature Reserve.