Kent · Air handling unit cleaning
Air handling unit cleaning in Henhurst, Kent
Air handling unit cleaning for Henhurst, with a survey first and a report with photos at the end. Ask us for a fixed quote.
- Air handling units never cleaned inside
- Dirty coils holding back the airflow
- Rooms that smell stuffy when the system runs
FAQs for Henhurst
Do you clean school ventilation in Henhurst in the holidays?
Yes. Half-terms and the summer break are the natural time for school work. With about 10 schools and colleges on the FSA’s register within roughly a mile and a half of Henhurst, it pays to plan holiday dates ahead. Send us your term dates when you phone us on 0345 646 2711 or use the quote form, and we’ll fit the work in.
Can you come to Henhurst after we close?
Yes, evening, overnight and weekend work is normal for us. The work in Henhurst can fit around your hours. Just ring 0345 646 2711 or send us an email with your opening times and we will plan around them.
What do you clean inside the unit?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. Filters are cleaned or changed as agreed in the quote.
Will the ventilation be off while you clean?
Yes, while the clean is under way. Out-of-hours work is available to keep disruption down.
What accreditations do you have?
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.
Is there a survey before the work?
Yes. We always survey first, either from photos and details you send or on a site visit. Then you get a fixed quote.
Do you offer emergency callouts?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, with the emergency line covering every other hour.
What’s TR19?
BESA’s ventilation hygiene specification, with two parts that matter most here: TR19® Grease for kitchen extract systems and TR19® Air for general ventilation. It isn’t law, but it’s the benchmark.
How we handle AHU cleaning in Henhurst
Think of an AHU clean as a full check-up for the ventilation. We look inside each section, clean what we find and record it with photos, so the report shows exactly what was done. Typical jobs include leaves and litter drawn into the unit and units needing a clean before a new tenant or handover, on internal panels, heating and cooling coils and filter sections.
In rural areas, ventilation units are often in roof voids or outbuildings, which makes them easy to overlook.
The paperwork matters as much as the work. Each visit is written up with pictures, covering the work done, any areas we couldn’t access and a recommended next date. Keep it with your fire safety records so it’s ready for an insurer, fire officer or EHO.
- Where
- Henhurst (DA12)
- Wider area
- Kent
- Paperwork
- Photo report after each visit
- Quote
- A fixed price before any work starts
- When we work
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Last updated
- 30 October 2026
What happens on the day
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 one overnight shift for many single units, with bigger plant phased, and the area is cleaned down before we leave. Photos of the system and how to reach it help us plan a visit to Henhurst.
- We survey the unit from photos or on site and agree what’s included.
- The unit is shut down with your site team and the area protected.
- 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.
- A TR19® certificate and photo report follow the clean.
Before we arrive
- Tell us where we can park and unload
- Find the previous report, if there is one
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
How to get a quote
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, the quote is fixed before any work is booked.
Related advice
What the work involves, part by part
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.
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.
Looking after it afterwards
No system stays clean for ever, but care slows the build-up. A few tips:
- Report water on the plant room floor
- Check the drain tray is emptying during routine visits
- Don’t ignore odours coming through the grilles
- Keep inspection doors on the unit in good order
Keep filter changes on schedule between cleans, because good filters protect everything downstream. Record each change in the maintenance log.
Make sure access doors and panels on the unit open easily. If a section is hard to get into, it tends not to get checked.
When something else is needed
Some problems need a different service or another trade:
- Faulty motors, drives or bearings
- Ductwork downstream of the unit, which is a separate clean
- Controls and BMS settings that run the unit
If you’re not sure, just ring 0345 646 2711, or email photos and we’ll give you a straight answer before booking.
Where we work
- Filter sections
- Dampers and louvres
- Drain trays
- Internal panels
- Heating and cooling coils
- Supply and extract fans
Henhurst buildings and their air
Going by the FSA’s register, there are about 10 schools, colleges and universities and about 4 care, childcare and hospital premises serving food within 1.5 miles or so of the middle of Henhurst. Busy, occupied buildings like these are where clean supply air matters most. About 22 miles out from central London, Henhurst is part of the South East area we work across. A survey and a fixed quote come first, then the visit at a time that suits you. Gravesham Community Hospital is the nearest hospital, about 3 miles north of Henhurst. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
For schools like Singlewell Primary School, the holidays are the usual time to inspect and clean ventilation. Gravesham Community Hospital, about 3 miles north, is the nearest hospital to Henhurst, and healthcare sites of every size need their supply air kept clean.
Henhurst is about 2 miles south of Gravesend, in Kent. Henhurst gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where needed and a written report with pictures. Our Kent coverage runs to 922 places, Henhurst among them. For sites nearby, see our Maidstone page, about 11 miles away.
Postcode districts we cover here for AHU cleaning: DA12. Neighbouring places we cover for AHU cleaning include Singlewell or Ifield (1 mile north-west), Istead Rise (1 mile west), Gravesend (2 miles north), Denton (2 miles north) and Northfleet Green (2 miles north-west). We also work in nearby towns such as Maidstone (11 miles south-east), Dartford (8 miles west), Sevenoaks (12 miles south-west), Tonbridge (15 miles south), Northfleet (3 miles north-west) and Swanley (9 miles west).
Around Henhurst
Typical jobs here are in premises near Jeskyns, The George Inn and Thamesview School and the streets around them. Henhurst’s nearest station is Sole Street station, about 1.3 miles south. Nearby you will also find Gravesham Museum (2.8 miles north) and Gravesham Community Hospital (3 miles north). Green spaces nearby include Sawyers Lake and Gad's Hill.
In-house cleaning or a specialist?
Keep a record of what your team does. A dated log of in-house cleaning and checks helps show that the system is managed between specialist visits, alongside our reports.
For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
What else we do in Henhurst
For landlords and multi-site operators
We work for landlords, managing agents and facilities managers as well as the people running the site. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.
We regularly work with managing agents. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
How we price AHU cleaning
You’ll get a fixed price before work begins. It’s based on:
- Site rules, permits and inductions
- The size of the system
- The times the site is available
- Whether several sites go on one quote
The price reflects the work, not guesswork. That is why we survey first, from photos or on site, and the price is agreed before work begins.
What we need to know
Many jobs can be priced from photos and some basics. Send what you can of the following:
- Wide photos of the system and the area around it
- The postcode and the type of business
- Any symptoms, from odd noises to smells or leaks
- The paperwork from the last visit, if you have it
We don’t publish a price list, because no two systems are the same. We look at your system first, from pictures or on a visit, then send a fixed quote. To start, ring 0345 646 2711 or send us an email.