Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Chorleywood, Hertfordshire
Our technicians work in Chorleywood on 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 as standard.
- Dust-coated heating and cooling coils
- Air handling units never cleaned inside
- Debris and leaves in the fresh air intake
What happens if it’s left?
Facilities teams are often asked for evidence that the ventilation is looked after. A TR19® certificate and photo report give you that, for audits, tenants or your own peace of mind. A quieter site near Chorleywood still needs its system looked after.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Ask for a fixed quote and we’ll go through it with you.
Why choose Duct Doctor in Chorleywood
- Full insurance on every job
- Ventilation hygiene specialists since 2009
- CHAS, SafeContractor and ISO 9001
- A written report with pictures after each visit
Read what affects the cost or our accreditations and certificates.
How we handle AHU cleaning in Chorleywood
Units vary a lot in size, age and layout, from a small ceiling-mounted unit to a large rooftop plant. Every job starts with a survey, from pictures or on site, followed by a fixed quote, so you know where you stand. If you have air handling units never cleaned inside and fan sections that haven’t been cleaned in years, we can help, from dampers and louvres, drain trays and filter sections onwards.
For a building near Chorleywood, the visit is planned around how it’s used, and the journey is planned ahead. The method does not change: inspect first, clean, then record what was done.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with pictures, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Where
- Chorleywood (WD3)
- Wider area
- Hertfordshire
- Reporting
- Written report with pictures
- Quotes
- Fixed quote, normally within a working day
- Hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Checked
- 30 October 2026
Places near Chorleywood
Also in Chorleywood
AHU cleaning around Chorleywood
Food Standards Agency records list about 15 schools, colleges and universities and about 11 care, childcare and hospital premises registered as food businesses within about 1.5 miles of central Chorleywood. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. For Chorleywood, the closest hospital is Harefield Hospital, roughly 3.2 miles south. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too. We cover Chorleywood, about 20 miles from central London, as part of our work across London and the South East. Visits are booked around your hours, evenings and weekends included.
If you manage a school such as Christ Church Chorleywood CofE School, ventilation cleaning is best booked for the holidays. Hospitals such as Harefield Hospital (about 3.2 miles south) show how much a building can rely on clean ventilation, and smaller healthcare sites near Chorleywood are no different. If you manage shops or offices close to Chorleywood station, a TR19® Air inspection shows whether the ductwork needs cleaning.
Chorleywood is about 5 miles west of Watford, in Hertfordshire. From the centre of Chorleywood to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. Chorleywood is one of 381 towns, villages and districts in Hertfordshire where we work for AHU cleaning. We also work in London, around 20 miles away.
Every address in WD3 is covered for AHU cleaning, from busy streets to back roads. That includes premises on South Cottage Drive, South Cottage Gardens and South Park Avenue and the roads around them. Chorleywood sits on or near the A404, which makes travel easy for AHU cleaning. If your site is just outside Chorleywood, we cover Heronsgate (1 mile south-west), Maple Cross (2 miles south), Chenies (2 miles north-west), Horn Hill (2 miles south-west) and West Hyde (3 miles south). Within a short drive, we also cover Watford (5 miles east), Hemel Hempstead (7 miles north), St Albans (10 miles north-east), Harpenden (13 miles north-east), Hatfield (14 miles north-east) and Borehamwood (10 miles east).
What’s near Chorleywood
In Chorleywood, that means kitchens and buildings near St Clement Danes School, Rickmansworth Park and Black Horse Artichoke Dell pub, among other places. The nearest railway station is Chorleywood station, about 0.7 miles west. Nearby you will also find Harefield Hospital (3.2 miles south) and Chiltern Open Air Museum (2 miles south-west). Green spaces nearby include Chorleywood Common and Tumbling Bay.
In-house cleaning or a specialist?
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. Cleaning inside ducts and units is specialist work.
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but the parts you cannot see still need a specialist at the right interval.
Multi-site and managed buildings
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We are happy to deal with either side, and the report can go to both.
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’re happy to quote for all of it.
The process
Every visit runs to the same pattern: protect the area, make the system safe, carry out the AHU cleaning, tidy up and hand over the paperwork. The visit itself takes a single shift for a typical unit, longer for large or heavily soiled ones. Your opening hours decide when we come to Chorleywood, not ours.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- The unit is closed up and handed back, with a report to follow.
Getting ready for the visit
- Make sure equipment near the work can be switched off and left to cool
- Make sure someone can let us in and lock up afterwards
- Let us know about parking and loading
How to get a quote
Every quote begins with a look at the system, from your pictures and details or, where that isn’t enough, a survey on site. Then we send a fixed price, before work begins.
Related advice
Chorleywood questions
Do you clean school ventilation in Chorleywood in the holidays?
Yes, out-of-term visits are normal for schools. There are about 15 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Chorleywood. Booking early in the term gives the best choice of holiday dates.
Do you work at weekends in Chorleywood?
Yes, nights and weekends are routine for us. That way a site in Chorleywood does not have to lose a day’s trading. Let us know the hours you’re closed and we will book within them.
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.
How long does an AHU clean take?
The work takes anything from half a day for one small unit to several shifts for a plant room full of them. Large plant can be split over several shifts, so ring 0345 646 2711, or email photos to talk it through.
Can you clean the ducts connected to the AHU?
Yes. We reach the ducts through access panels, with anything inaccessible recorded, and new panels can be fitted.
What happens if you cannot reach some of it?
We never leave them off the paperwork. The report says which parts couldn’t be reached and why, along with a quote to put access in.
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.
Is there a report after cleaning?
Yes, a TR19® certificate and a photo report. The report also suggests when the unit should next be inspected.
Between visits
A little care between visits keeps the system in better shape. Our advice:
- Diary the inspection date recommended in the report
- Make sure the unit’s access doors open easily
- Look at the condensate drain whenever the unit is serviced
- Keep the certificate and photo report with the plant records
Keep filter changes on schedule between cleans, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Make the drain tray part of every maintenance visit. A drain that’s cleared early never gets to the slime stage.
Different parts, different methods
Fans and fan sections
Dust on a fan impeller adds weight and wear. Cleaning keeps it running as intended.
Filters
What’s on the filters is a good clue to what’s further in. We photograph them for the report.
How we price AHU cleaning
We do not publish a price list, because sites vary so much. What we look at:
- Whether several sites go on one quote
- A single visit or a regular plan
- Any permits to work or inductions
- How big the system is
You will not find a price list here, because the cost depends on the site in front of us. Call for a fixed quote, and we will explain what it covers.
Asking for a quote
To help us quote quickly, please include:
- Your opening hours and when the area is out of use
- The postcode and the type of business
- Any access panels or hatches you can see
- Photos showing the whole system and its surroundings
We do not publish a price list, because every site is different. Instead, we look at your site first, from pictures or a survey, then send a fixed quote. To get going, ring 0345 646 2711 or email us.