Greater London · Air handling unit cleaning
AHU Cleaning in West Hendon
AHU cleaning for West Hendon and the surrounding area: diagnosis first, then a fixed quote, the work and a report with photos. Ask us for a fixed quote.
- Filters that are clogged or overdue
- Air handling units due a clean after building work
- Intake sections clogged with outdoor debris
AHU cleaning in West Hendon
All the building’s air passes through the fan, so dust on its blades and housing ends up in the airstream. We clean the fan section along with the rest of the unit, with the unit switched off and made safe first. The work covers supply and extract fans, drain trays and filter sections, and common reasons people get in touch are fan sections that haven’t been cleaned in years and air handling units with blocked filters.
Across London, offices, hotels, schools and healthcare buildings rely on mechanical ventilation, much of it supplied through air handling units on roofs or in basements. For a building in West Hendon, dust settles in the units and ducts year after year, which is what TR19® Air cleaning deals with.
Duct Doctor has been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we’re fully insured.
- Where
- West Hendon (NW9, NW4)
- Wider area
- Greater London
- Paperwork
- Written report with photos
- Price
- A fixed quote up front
- Hours
- Nights, weekends or holidays to suit you
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
AHU cleaning around West Hendon
There are about 39 schools, colleges and universities and about 48 caring premises (care homes, nurseries and hospitals) on the FSA’s food hygiene register across West Hendon and its immediate surroundings (about a mile and a half). Where buildings like these have air handling units, filters, coils and drain trays need regular attention. St Andrew's Hospital is the nearest hospital, about 1.5 miles south-east of West Hendon. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes. Ventilation cleaning in London buildings is typically planned for evenings or weekends.
If you manage a school such as The Hyde School, ventilation cleaning is best booked for the holidays. Healthcare buildings such as St Andrew's Hospital, about 1.5 miles south-east, depend on their ventilation; if you manage a surgery, clinic or care home near West Hendon, yours matters too. Workplaces around Hendon station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts.
West Hendon is about 2 miles north of Neasden, in Greater London. Every kind of commercial site in West Hendon, we can take on AHU cleaning. We can work out of hours so trading is not interrupted. We cover 764 places across Greater London, from busy centres to quieter spots. For sites nearby, see our London page (9 miles or so).
Here we cover the NW9 and NW4 postcode area for AHU cleaning. Streets in the area include Alpini Road, Catkin Road and Garrick Road, all of which we cover for AHU cleaning. Being close to the A5, West Hendon is simple for us to get to at any hour. We also cover The Hyde (1 mile south), Colindale (1 mile north), The Burroughs (1 mile north-east), Hendon (1 mile east) and Staples Corner (1 mile south-east). We also work in nearby towns such as London (9 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (7 miles south-east) and Shoreditch (8 miles south-east).
Near you in West Hendon
Locally, jobs take us to businesses close to Woodfield School, Moon Under Water pub and Brampton College. West Hendon has its own railway station: Hendon station. Well-known places in the area include Brent Cross Shopping Centre (1.1 miles east) and Church Farmhouse Museum (1 mile north-east). Not far away are Masons Field and Parliament Hill.
Places near West Hendon
What else we do in West Hendon
Landlords, agents and facilities managers
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements and we will come back with a fixed quote.
Records are where multi-site compliance often slips. Each visit ends with a dated report and photos, so you can show an insurer or inspector what was done at each site.
What affects the cost of AHU cleaning
Sites vary more than people expect. What affects the quote:
- The number of sites or systems
- How easy every part is to reach
- The scale of the work
- One-off work versus a regular cycle
We don’t list prices on the website, because each job is priced on what it involves. Call for a fixed quote, and we’ll explain what it covers.
Asking for a quote
When you contact us, these details help:
- Any access panels or hatches you can see
- The roof, plant room or outside wall the system runs to
- Your opening hours and when the area is out of use
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
We do not publish a price list, because every site is different. 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.
Leave it or put it right?
Stuffy rooms and stale smells in a building in West Hendon can sometimes be traced back to the AHU. Cleaning it deals with the cause rather than the symptom. London sites work long hours, and the longer a job is left, the bigger it gets.
What you pay depends on the size of the system, the condition it’s in and how easy it is to reach. You get a fixed price before work begins, so there are no surprises.
Why West Hendon businesses choose us
- Photo reports with every job
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Ventilation hygiene specialists since 2009
- CHAS, SafeContractor and ISO 9001
Read what affects the cost and our accreditations and certificates.
Part by part
Drain trays
The drain tray collects water from the cooling coil. Standing water and slime are removed and the outlet is checked.
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. Each section is cleaned from the intake through to the outlet.
The process
Everything the job needs comes with us, from protective sheeting to tools and access equipment. All we need from you is clear access and the right equipment switched off. On site, the work takes from a few hours for a compact unit to a day or more for a large one. Before any visit in West Hendon, we agree where the van can stop and how equipment reaches the system.
- The survey covers the unit, its access and how it can be shut down.
- The area is protected and the unit made safe.
- Each section is cleaned of dust, debris and slime.
- We clean the coils and clear the tray and drain.
- The unit is closed up and handed back, with a report to follow.
Before we arrive
- Have your last certificate or report to hand
- Arrange a key holder or contact on site
- Let us know how we reach the system, including roofs, risers and plant rooms
How to get a 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. A few pictures and your last certificate or report help a lot. You’ll typically have a quote within one working day.
Read more
West Hendon questions
Do you work overnight in West Hendon?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in West Hendon needn’t be disturbed. When you call us on 0345 646 2711 or use the quote form, mention when the site is quiet.
Can a school’s ventilation in West Hendon be done out of term time?
Yes. Half-terms and the summer break are the natural time for school work. The FSA’s register shows about 39 schools and colleges with food registrations within roughly a mile and a half of West Hendon. Just phone us on 0345 646 2711 or use the quote form with your term dates and we’ll plan around them.
How much does AHU cleaning cost?
We do not 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 we start.
How do you keep the site clean during the work?
We cover floors and nearby surfaces with sheeting before we start, and waste is contained as we go. At the end, the area is cleaned down.
What’s included in an AHU clean?
Filters, coils, drain trays, the fan and the internal surfaces are all covered. What happens to the filters is agreed when we quote.
How often should an air handling unit 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.
Can you come out in an emergency?
Yes, day and night, every day of the year. Office hours are Monday to Friday, 8am to 6pm, with the emergency line covering every other hour.
What’s TR19?
It’s the industry benchmark for cleaning ventilation and kitchen extract systems, written by BESA. It sets out inspection, cleaning and record keeping and expects a risk-based approach.
What staff can safely do
Some jobs should never be done in-house: entering ducts, working on fans, testing dampers and taking grease readings need training, the right equipment and safe access. That’s our job.
Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but the parts you cannot see still need a specialist at the right interval.
Keeping the system healthy
How long the results last depends on use and care. We suggest:
- Clear leaves and litter away from the intake
- Report musty smells from the vents straight away
- Make sure condensate is draining away
- Make sure the unit’s access doors open easily
Restart the unit with your site team or maintenance contractor once we have finished. Check the drain tray is emptying over the first few days to confirm water is draining away.
Keep the unit’s doors and panels in working order. Sections that are awkward to open are the ones that get skipped.