Hertfordshire · Air handling unit cleaning
Radlett AHU cleaning
Specialist AHU cleaning for Radlett: a survey, a fixed price, careful work and proper paperwork. Call for a fixed quote.
- Units needing a clean before a new tenant or handover
- Stale or musty smells from the ventilation
- Units that have only ever had filter changes
AHU cleaning in Radlett
Our AHU cleans for sites in Radlett cover the parts that collect dirt: the filter section, heating and cooling coils, drain trays, fan and casing. Every clean comes with a TR19® certificate and before and after photos in a report. We’re often asked to deal with plant that needs cleaning after a refit and dust-coated heating and cooling coils, on internal panels, drain trays and filter sections.
Visits to a place like Radlett are fitted around opening hours. The method does not change: inspect first, clean, then record what was done.
For insurers and inspectors, the record counts. So every job comes with a written report and pictures, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Radlett (WD7)
- Wider area
- Hertfordshire
- Records
- Photo report after each visit
- Quote
- Fixed quote, usually within a working day
- Hours
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
What staff can safely do
Good housekeeping makes our visits easier, not unnecessary. Clean filters and tidy surfaces slow the build-up, but hidden parts of the system still need specialist attention.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We will take a look and send you a fixed quote.
What happens on the day
On the day, we arrive at the time agreed with you, which is often after service, overnight or at a weekend. Equipment that has to be off is switched off and allowed to cool before we start, and the area around the work is covered and protected. The work itself takes a single shift for a typical unit, longer for large or heavily soiled ones. Getting to the system matters more than parking in a place like Radlett, so let us know how to reach it.
- 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.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Have your last certificate or report to hand
- Let us know about permits to work or site inductions
- Make sure someone can let us in and lock up afterwards
Get a fixed quote
To help us quote: where the site is, what it is and its opening hours, a few pictures and any previous report or certificate. Then call us on 0345 646 2711 or drop us a line.
Advice
Common problems we fix in Radlett
No filter stops everything. The fine dust that passes the filters lands on the coils, the fan and the internal panels, a little more each month.
Clients normally contact us after spotting one of these:
- Filters that are clogged or overdue
- Air handling units never cleaned inside
- Debris and leaves in the fresh air intake
- Plant that needs cleaning after a refit
If you manage a school such as St John's Church of England Infant and Nursery School, ventilation cleaning is best booked for the holidays.
What your quote should include
- Proof of accreditation you can verify
- Whether the price is fixed
- Whether VAT is included
- How they set the interval to the next visit
Why it’s worth doing now in Radlett
Dirt left in an air handling unit doesn’t stay in the unit. It moves on into the ductwork and out into the rooms, which is why the unit and the ducts are best cleaned together. You choose the date of a planned visit, and a breakdown never asks.
Leaving it longer rarely makes the work cheaper. Build-up, wear and faults tend to get worse, not better, and a neglected system can mean more work. If you’re not sure what’s needed, call 0345 646 2711 or send us an email for straight advice and a fixed quote.
Why choose Duct Doctor in Radlett
- Fixed quotes, usually within one working day
- Each visit written up, with photos
- One number for every site across the South East and London
- Work around your opening hours, with 24/7 emergency cover
What a clean will not put right
An honest diagnosis matters more to us than a booking, so here’s what this work cannot put right:
- Mechanical faults with motors, belts or bearings
- Coils that are corroded or leaking and need replacing
- A system that is undersized for the building
If in doubt, ring 0345 646 2711 or email us and we will say what we think before booking.
Where we work
- Supply and extract fans
- Dampers and louvres
- Filter sections
- Heating and cooling coils
- Drain trays
- Internal panels
Radlett questions
Can ventilation in schools around Radlett be cleaned out of term?
Yes. Half-terms and the summer break are the natural time for school work. Around Radlett, the Food Standards Agency lists about 5 schools and colleges with registered kitchens within a mile and a half or so. Booking early in the term gives the best choice of holiday dates.
Is Radlett within the area you cover?
Yes. Villages and rural sites across the South East are part of our work, Radlett included. Just mention lanes, gates or anything else about the site when you book.
How do you protect the area?
By covering it before any work starts. The work is kept contained and clean down when we finish.
How much does AHU cleaning cost?
It depends on the site, so we quote each one individually. For a quote, give us a ring on 0345 646 2711 or send us an email with the site type, opening hours and a few pictures.
Will we get paperwork for the AHU clean?
Yes, both a certificate and a report with pictures. The report also suggests when the unit should next be inspected.
Which sectors do you work in?
Commercial premises of every kind: kitchens, offices, schools, healthcare, retail, leisure and food production. We fit the work around how the site operates.
Can you clean the ducts connected to the AHU?
Yes. Ventilation ductwork cleaning to TR19® Air is part of what we do. It’s often worth doing both at once, and we can survey both on the same visit.
How long does an AHU clean take?
Typically the clean takes from a few hours for a compact unit to a day or more for a large one. We plan the shutdown around that, out of hours if needed.
AHU cleaning in Radlett: local notes
Food Standards Agency data includes about 5 schools, colleges and universities and about 3 caring premises (care homes, nurseries and hospitals) within about 1.5 miles of central Radlett. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. About 16 miles out from central London, Radlett is part of the South East area we work across. We work evenings, overnight and at weekends, so the visit fits around the site. About 1.4 miles north-east of Radlett is Shenley Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
If you run a surgery, dental practice or care home near Radlett, clean ventilation matters as much to you as to a hospital like Shenley Hospital (about 1.4 miles north-east). If you manage offices or shops near Radlett station, their ventilation can be inspected and cleaned out of hours.
Radlett is about 3 miles north-west of Borehamwood, in Hertfordshire. Whatever kind of site you run in Radlett, we can take on AHU cleaning. We can work out of hours so trading is not interrupted. Across Hertfordshire, we cover 381 places, Radlett among them. Our London page covers sites nearby, about 16 miles away.
AHU cleaning in WD7 is surveyed, quoted and booked the same way as anywhere else. You will find streets such as Upper Station Road, Station Road and Barn Close, and we cover them all for AHU cleaning. Being close to the B462 and A5183, Radlett is easy for our technicians to reach for AHU cleaning. Nearby, we also carry out AHU cleaning in Kemprow (1 mile west), Round Bush (1 mile south-west), Letchmore Heath (1 mile south-west), Aldenham (2 miles south-west) and Patchetts Green (2 miles south-west). Larger places within reach include Watford (4 miles south-west), Hemel Hempstead (8 miles north-west), St Albans (5 miles north), Welwyn Garden City (10 miles north-east), Harpenden (9 miles north) and Hoddesdon (14 miles east).
Landmarks near Radlett
Typical jobs here are in premises near The Cat And Fiddle Public House and the streets around them. There’s a railway station in Radlett itself: Radlett station. Other landmarks nearby include Radlett and District Museum (within half a mile south-east) and Harlequin Centre (3.7 miles south-west). Open spaces near Radlett include Verulamium Lake and Broad Colney Lakes.
Towns and villages near Radlett
Also in Radlett
Keeping the system healthy
Once we’ve finished, these simple steps help:
- Keep filter changes on time and recorded
- Report stiff or damaged access doors
- Do not store bins or materials near the intake
- Do not ignore odours coming through the grilles
If the ductwork hasn’t been cleaned, consider it next. Cleaning the unit and ducts together gives the best result, and we can quote for both.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
What the work involves, part by part
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. Cleaning keeps it running as intended.
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.