Kent · Air handling unit cleaning
Air handling unit cleaning in Lenham Forstal, Kent
We cover Lenham Forstal for cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Out-of-hours visits, a fixed quote and a written report with photos on every job.
- Drain trays holding standing water
- Units that have only ever had filter changes
- Rooms that smell stuffy when the system runs
How we handle AHU cleaning in Lenham Forstal
Our AHU cleaning covers sites in Lenham Forstal and the rest of Kent, in buildings such as offices, schools, healthcare sites and shops. The work is timed around when the system can be switched off, including evenings, nights and weekends. We are often asked to deal with units needing a clean before a new tenant or handover and dirty fans and fan housings, across heating and cooling coils, filter sections and supply and extract fans.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
Think of the report as the system’s health record: a dated account with pictures of everything we did. Grease extract cleans are also certificated to TR19® Grease through the BESCA VHE portal, ready for your insurer.
- Where
- Lenham Forstal (ME17)
- Wider area
- Kent
- Paperwork
- Photo report after each visit
- Quote
- A fixed price before we start
- Hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Last updated
- 30 October 2026
What happens if it’s left?
A light clean now is simpler than a heavy one later. Years of build-up make the job longer and harder, particularly where damp has made it stick. Out of sight is the usual reason a rural system goes too long without attention.
Combining work into one visit or one programme can make for a more efficient booking. Tell us about everything you’d like looked at and we will price it together.
Why choose Duct Doctor in Lenham Forstal
- CHAS, SafeContractor and ISO 9001
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Each visit written up, with photos
- One contact for all your sites in London and the South East
See what affects the cost and our accreditations and certificates.
Also near Lenham Forstal
More services for Lenham Forstal
Keeping the system healthy
Aftercare is simple, and it makes the next visit easier:
- Report stiff or damaged access doors
- Change filters on schedule and log each change
- Plan the next inspection before the last report gets filed away
- Clear leaves and litter away from the intake
The report shows each section of the unit before and after, and note any part we couldn’t get to. Any defects we noticed, like a leaking tray or damaged lining, are listed.
Keep the area around the intake clear. Anything around the intake is likely to be drawn in.
What the work involves, part by part
Drain trays
Drain trays can rust and leak over time. We record their condition with photos so you can decide on any repairs.
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.
In-house cleaning or a specialist?
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We can diagnose it and quote.
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
When to call us in Lenham Forstal
Cooling coils create condensation, and that water has to go somewhere. If the drain tray outlet blocks or the tray does not fall properly, water stands in it, and that’s where slime and odours start.
The symptoms we are asked about most are:
- Odours coming through the supply air
- Dirty fans and fan housings
- Blocked condensate drains and slimy trays
- Leaves and litter drawn into the unit
For buildings in and around Lenham Forstal, TR19® Air cleaning starts with an inspection.
Comparing quotes
- If the quote is a fixed price or an estimate
- What records you’ll receive afterwards
- Whether VAT is included
- Whether inaccessible sections are listed on the report
AHU cleaning around Lenham Forstal
There are about 3 schools, colleges and universities on the FSA’s food hygiene register within roughly a mile and a half of the centre of Lenham Forstal. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. We cover Lenham Forstal, about 41 miles from central London, as part of our work across London and the South East. Evening, overnight and weekend visits are all possible.
If you manage a school such as The Lenham School, ventilation cleaning is best booked for the holidays.
Lenham Forstal is about 8 miles north-west of Ashford, in Kent. Sites in Lenham Forstal get the same service as everywhere we cover: a survey first, a fixed quote, work timed around your hours and a report with photos. Our area takes in 922 places across Kent, from busy centres to quieter spots. For sites nearby, see our Maidstone page (10 miles or so).
We work across the ME17 postcode area for AHU cleaning and the roads nearby. We cover sites on The Forstal, Mount Castle Lane and Burgess Fields and the roads around them. We also cover the places around Lenham Forstal: Lenham Heath (1 mile south-east), Charing Heath (1 mile south-east), Stonebridge Green (1 mile south), Leadingcross Green (2 miles north-west) and Lenham (2 miles north-west). Further out, we also cover Maidstone (10 miles west), Ashford (8 miles south-east), Canterbury (15 miles east), Sittingbourne (9 miles north), Faversham (9 miles north-east) and Minster (14 miles north).
Around Lenham Forstal
Locally, jobs take us to businesses close to Kiln Wood and the streets around them. The closest station to Lenham Forstal is Lenham station, about 1.7 miles north-west. A little further out are Coldbridge Castle (2.3 miles south-west).
The process
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 half a day to a full day per unit, with large plant planned over several shifts. For a village or hamlet like Lenham Forstal, tell us about narrow lanes, gates and parking when you book.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After pictures are taken and the certificate issued.
Preparing for the visit
- Mention any parking or loading restrictions
- Tell us the best time to work, such as after service or at a weekend
- Make sure someone can let us in and lock up afterwards
Get a fixed 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.
Related advice
How we price AHU cleaning
You will get a fixed price before we start. It takes into account:
- Access, including roofs, risers and ceiling voids
- Whether several sites go on one quote
- Travel, parking and unloading
- Any permits to work or inductions
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before work begins.
Asking for a quote
There’s no need for technical detail. Just send:
- Your last certificate, test record or report
- Close-ups of filters, grilles, hatches or access panels
- The roof, plant room or outside wall the system runs to
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, you get a fixed price before any work starts.
Your questions about AHU cleaning in Lenham Forstal
Can you come to Lenham Forstal after we close?
Yes, nights and weekends are routine for us. The work in Lenham Forstal can fit around your hours. Just phone us on 0345 646 2711, or send details by email with your opening times and we’ll plan around them.
Do you cover smaller places like Lenham Forstal?
Yes, we work in villages as well as towns, and Lenham Forstal is covered. The journey is planned ahead, so a few details about the route help.
Which accreditations do you hold?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we carry full insurance.
How far ahead should we book?
Earlier is better, particularly for night and weekend visits. Quotes normally come back within one working day, and there’s a 24/7 line for emergencies.
How much does AHU cleaning cost?
We don’t publish prices, because the cost depends on the job: how big it is, what state it’s in, how we reach it and the working hours. We fix the price before work begins.
Can you clean the ducts connected to the AHU?
Yes, the ductwork, grilles and diffusers the unit serves. The survey shows whether the ducts need cleaning now.
Which sectors do you work in?
Commercial premises of every kind: kitchens, offices, schools, healthcare, retail, leisure and food production. Work is timed around how each site runs.
How do you protect the area?
We cover floors and nearby surfaces with sheeting before we start, and anything we remove is contained. Before we leave, we tidy up and clean down.