Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Borehamwood, Hertfordshire
Need AHU cleaning in Borehamwood? We survey first, give you a fixed quote and work around your opening hours, finishing with a written report and pictures.
- Leaves and litter drawn into the unit
- Dust built up on fan impellers
- Units needing a clean before a new tenant or handover
How we handle AHU cleaning in Borehamwood
An air handling unit is the heart of a building’s ventilation: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Anything that collects inside the unit can end up in the rooms it serves, so cleaning the unit matters as much as cleaning the ducts. The work covers dampers and louvres, internal panels and drain trays, and the jobs we see most are units needing a clean before a new tenant or handover and debris and leaves in the fresh air intake.
Buildings in towns like Borehamwood often have ventilation added in stages, with units on the roof or in a plant room. The work starts with an inspection to decide what needs cleaning, so you are not paying for more than the system needs.
Accreditations are easy to claim and worth checking. We’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Place
- Borehamwood (WD6)
- Region
- Hertfordshire
- Reporting
- Written report with pictures
- Quotes
- A fixed quote up front
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Page updated
- 30 October 2026
Why act early in Borehamwood
A clogged coil or dirty fan makes the unit work harder for the same airflow. The result is extra wear and a building that doesn’t feel as comfortable, and a planned clean is far less disruptive than a breakdown. In a town like Borehamwood, a problem caught early is a planned visit, not an emergency.
Combining work into one visit or one programme often makes better use of the time. Tell us about everything you’d like looked at, and you’ll get one fixed quote.
Why us?
- We diagnose before we treat
- CHAS, SafeContractor and ISO 9001
- Work around your opening hours, with 24/7 emergency cover
- Fully insured
Read what affects the cost or our accreditations and certificates.
Honest limits
A few issues sit outside what this work can do:
- Ventilation that was badly designed in the first place
- Coils that are corroded or leaking and need replacing
- Mechanical faults with motors, belts or bearings
Not sure which it is? You can give us a ring on 0345 646 2711 or email us and we will tell you honestly before you book.
Parts of the system we cover
- Heating and cooling coils
- Drain trays
- Internal panels
- Supply and extract fans
- Dampers and louvres
- Filter sections
AHU cleaning in Borehamwood: local notes
Food Standards Agency data includes about 16 schools, colleges and universities, about 17 hospitals, care homes and childcare premises and about 4 hotels and guest houses within about 1.5 miles of central Borehamwood. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. Borehamwood is about 14 miles from central London, well within the area we cover across London and the South East. The visit is fixed around your opening hours, not ours. For Borehamwood, the closest hospital is Royal National Orthopaedic Hospital, roughly 2.4 miles south-west. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
Wherever a school like St Teresa Catholic Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time. Healthcare ventilation, from large hospitals like Royal National Orthopaedic Hospital (about 2.4 miles south-west) to small clinics, depends on clean filters, coils and ducts.
Borehamwood is about 5 miles east of Watford, in Hertfordshire. Borehamwood gets the same approach as every site we work on: a survey first, a fixed quote, work timed around your hours and a report with photos. We cover 381 places across Hertfordshire, large and small. We also work in London, around 14 miles away.
All of WD6 is within our area for AHU cleaning, from the main roads to the quietest streets. If you need AHU cleaning at premises on Station Road, Canterbury Road and Eldon Avenue or anywhere close by, we can help. With the A1 and A5135 close by, Borehamwood is easy for our technicians to reach at any hour. If your site is just outside Borehamwood, we cover Well End (1 mile north-east), Green Street (1 mile north), Deacon's Hill (1 mile south), Rowley Green (1 mile east) and Elstree (2 miles south-west). Further out, we also cover Watford (5 miles west), Hemel Hempstead (10 miles north-west), St Albans (7 miles north), Welwyn Garden City (10 miles north), Harpenden (11 miles north) and Hoddesdon (13 miles north-east).
Around Borehamwood
We work in commercial kitchens and buildings around Aldenham Country Park, The Pick & Shovel pub and Yavneh College. The closest station to Borehamwood is Elstree & Borehamwood station, about 0.6 miles south-west of the centre. Other landmarks nearby include Royal National Orthopaedic Hospital (2.4 miles south-west) and Spires Shopping Centre (3.1 miles east). Open spaces near Borehamwood include Darland's Lake and Rowley Lodge Field.
Signs you need AHU cleaning in Borehamwood
Mechanical servicing keeps a unit running, but it doesn’t always include cleaning the inside. That means a unit can tick every service box and still be carrying years of dirt.
Look out for any of the following:
- Stale or musty smells from the ventilation
- Units needing a clean before a new tenant or handover
- Dirty filters cutting the airflow
- Debris and leaves in the fresh air intake
If you run an office near Elstree & Borehamwood station, its supply ductwork can gather dust for years before anyone looks inside.
What your quote should include
- Whether inaccessible sections are listed on the report
- How they set the interval to the next visit
- Whether VAT is included
- What hours they’ll be on site
Part by part
Drain trays
Drain trays can rust and leak over time. Their condition goes into the report with pictures so you can decide on any repairs.
Heating and cooling coils
Heating and cooling coils have tightly packed fins that trap fine dust. We clean them with care so the fins aren’t damaged.
What your team can do, and what needs us
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
Staff cleaning does not replace a specialist visit; it supports it. Regular in-house cleaning slows the build-up, but hidden parts of the system still need specialist attention.
What happens on the day
There are three stages on the day: set-up, the treatment itself and the sign-off. Getting ready means protecting surfaces and switching off what needs to be off, and the sign-off is a written report with pictures. Most of the time goes on the work itself, which takes a single shift for a typical unit, longer for large or heavily soiled ones. Sites in a town like Borehamwood rarely need to lose trading hours, as the work fits around them.
- 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.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
Preparing for the visit
- Tell us about site rules, permits or sign-in
- Let us know when the site is closed or quiet
- Let us know about parking and loading
Getting 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.
Advice
Questions from Borehamwood
Do you cover Borehamwood for AHU cleaning?
Yes, we work in Borehamwood and the places around it. Get in touch with the details and we’ll arrange a survey.
Do you clean school ventilation in Borehamwood in the holidays?
Yes. Half-terms and the summer break are the natural time for school work. There are about 16 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Borehamwood. Send us your term dates when you ring 0345 646 2711, or send details by email, and we’ll fit the work in.
What does AHU cleaning cost?
Every site is different, so each gets its own fixed quote. To get one, call us on 0345 646 2711 or use the quote form and tell us about the site and its opening hours.
What types of premises do you cover?
Any commercial site with kitchens or ventilation, from a small pub to a hospital. Hotels, schools, care homes, offices, shops and leisure sites are all part of our work.
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.
Do you offer maintenance contracts?
Yes. Tell us what you have and how it’s used, and we will suggest a schedule and quote for it.
How do you protect the area?
Floors and surfaces near the work are sheeted before work begins, and waste is contained as we go. At the end, the area is cleaned down.
What do you need from me for a quote?
Where the site is, what it is and when it’s open, plus photos of the system and your last certificate or report if you have one.
How we price AHU cleaning
Some jobs are bigger than they look, and some smaller. The main factors:
- What state the system is in
- Working hours and out-of-hours timing
- How easy every part is to reach
- The number of sites or systems
Working hours, access and the scale of the site all affect the cost. Each of those is built into the quote and give you a fixed price before we start.
What we need to know
What to send for a quote:
- The roof, plant room or outside wall the system runs to
- Problems your staff have spotted
- Your opening hours and when the area is out of use
- Close-ups of filters, grilles, hatches or access panels
Quotes are quick. Call or email with a few details and you will normally have a fixed price within one working day. If we need to see the system first, we book a survey around your hours.