Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Croxley Green, Hertfordshire
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Croxley Green, surveyed first and signed off with a written report and photos. Ask us for a fixed quote.
- Stale or musty smells from the ventilation
- Dirty coils holding back the airflow
- Filters that are clogged or overdue
What a clean won’t put right
We will always give you a straight diagnosis, so here’s what AHU cleaning will not do:
- Ductwork downstream of the unit, which is a separate clean
- Controls and BMS settings that run the unit
- Airflow problems caused by the system’s design
Not sure which it is? You can call 0345 646 2711 or email us and we’ll tell you honestly before booking.
Where we work
- Filter sections
- Internal panels
- Drain trays
- Heating and cooling coils
- Dampers and louvres
- Supply and extract fans
AHU cleaning in Croxley Green, done properly
We clean air handling units for buildings in Croxley Green and across Hertfordshire, working to TR19® Air, in offices, schools, hospitals, care homes and retail. Units are cleaned when the site can spare them, often evenings, overnight or weekends. If you have dust-coated heating and cooling coils and plant that needs cleaning after a refit, we can put it right.
For a building in or near Croxley Green, access is agreed in advance and the visit is planned around the journey, and the ventilation is inspected, cleaned and recorded the same as anywhere.
We have been trading since 2009, as a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. We also hold CHAS, SafeContractor and ISO 9001, and we are fully insured.
- Location
- Croxley Green (WD3, WD18)
- Region
- Hertfordshire
- Paperwork
- Report and photos after the visit
- Price
- A fixed price before work begins
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
What the work involves, part by part
Internal casing and panels
Access doors and panels are opened in turn and closed properly afterwards, and check every one is shut.
Fans and fan sections
Before the fan is touched, the unit is shut down and made safe with your site team.
Croxley Green: your questions answered
Is Croxley Green within the area you cover?
Yes. Croxley Green is within the area we cover across London and the South East. The journey is planned ahead, so a few details about the route help.
Can ventilation in schools around Croxley Green be cleaned out of term?
Yes. Half-terms and the summer break are the natural time for school work. There are about 17 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of Croxley Green. Send us your term dates when you call 0345 646 2711 or use the quote form, and we will fit the work in.
What if parts of the system cannot be reached?
Anything we cannot reach goes on the report, with a note of where it is, and we tell you what would make it reachable, for example new access panels.
Can you price the work without visiting?
Yes, for many jobs. Send wide shots, close-ups of any access panels and anything that worries you, and we normally come back within one working day. Some sites still need a visit, and we will say so.
Where does the waste go?
It’s contained and taken away. We collect grease, debris and waste water as we go, so it doesn’t spread.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
How much does AHU cleaning cost?
We do not publish prices, because the cost depends on the job: the size of the system, its condition, access and when we can work. We fix the price before any work starts.
What’s TR19?
A BESA 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.
In-house cleaning or a specialist?
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.
A few tasks are always specialist work: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. That is our job.
The process
There’s very little for your team to do on the day. A contact on site lets us in at the agreed time and points us to the system, and we take it from there. Afterwards, the area is left tidy and the written report follows. Somewhere like Croxley Green, lanes, gates and parking are worth mentioning in advance.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
Getting ready for the visit
- Name a contact who can let us in at the agreed time
- Clear the space around the work
- Agree a time when the area can be out of use
Getting a quote
Need a price for AHU cleaning? Please give us a ring on 0345 646 2711 or send us an email with a few details about the site. We’ll explain what we’d do and send a fixed quote before anything is booked.
Related advice
Why act early in Croxley Green
Stuffy rooms and stale smells in a building in Croxley Green can sometimes be traced back to the AHU. Cleaning it deals with the cause rather than the symptom. In a place like Croxley Green, ductwork and fans are easy to forget until something goes wrong.
Combining work into one visit or one programme often makes better use of the time. Mention every system or site you need covered, and you will get one fixed quote.
Why book with us
- Ventilation hygiene specialists since 2009
- A fixed price before any work starts
- We are fully insured
- Every job surveyed first
Take a look at how cleaning jobs are priced or how to check a contractor.
Aftercare tips
So the system stays in good health:
- Note any water around the unit or leaks below it
- File each AHU report in the maintenance log
- Clear leaves and litter away from the intake
- Don’t ignore odours coming through the grilles
We recommend when the unit should next be inspected or cleaned, based on what we found. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
What we’re called out for in Croxley Green
Planned maintenance often covers belts, motors and filters but not cleaning. So a unit can be well maintained and still dirty.
Look out for any of the following:
- Dirty fans and fan housings
- Units needing a clean before a new tenant or handover
- Leaves and litter drawn into the unit
- Odours coming through the supply air
Healthcare buildings such as Watford General Hospital, about 1.8 miles east, depend on their ventilation; if you manage a surgery, clinic or care home near Croxley Green, yours matters too.
Questions to ask before you book
- What’s included in the scope, part by part
- Whether the quote is based on a survey or pictures
- Whether they recommend a next date
- When they can work, and whether that’s outside your opening hours
Nearby places to Croxley Green
More services for Croxley Green
AHU cleaning around Croxley Green
Food Standards Agency data includes about 17 schools, colleges and universities and about 9 caring premises (care homes, nurseries and hospitals) across Croxley Green and its immediate surroundings (about a mile and a half). Busy, occupied buildings like these are where clean supply air matters most. About 1.8 miles east of Croxley Green is Watford General Hospital, the nearest hospital. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. We cover Croxley Green, about 18 miles from central London, as part of our work across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site.
For schools like Harvey Road Primary School, the holidays are the usual time to inspect and clean ventilation.
Croxley Green is about 1 mile north-east of Rickmansworth, in Hertfordshire. If you need AHU cleaning in Croxley Green, please call 0345 646 2711, or email photos for a fixed quote. Our area covers London and the South East, including Croxley Green. We cover 381 places across Hertfordshire, from busy centres to quieter spots. Our London page covers sites nearby (18 miles or so).
AHU cleaning in WD3 and WD18 is surveyed, quoted and booked the same way as anywhere else. That includes premises on New Road, Harvey Road and Bateman Road and nearby roads. We also cover Holywell (1 mile east), Rickmansworth (1 mile south-west), Batchworth (1 mile south-west), Chorleywood West (2 miles west) and Moor Park (2 miles south). Within a short drive, we also cover Hemel Hempstead (7 miles north), St Albans (9 miles north-east), Welwyn Garden City (15 miles north-east), Harpenden (12 miles north), Hatfield (12 miles north-east) and Borehamwood (7 miles east).
Around Croxley Green
In Croxley Green, that means kitchens and buildings near Croxley Danes School, Rickmansworth School and The Red House and the streets around them. For rail, the closest station is Rickmansworth station, roughly 1.3 miles west of the centre. Well-known places in the area include Hertfordshire Fire Brigade Museum (2.4 miles east) and Hilfield Castle (4.7 miles east). For a walk, there’s Chorleywood Common and Tumbling Bay.