Greater London · Air handling unit cleaning
AHU Cleaning in Rowley Green
For AHU cleaning in Rowley Green, one call is all it takes: survey, fixed quote, work and sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Plant that needs cleaning after a refit
- Dust-coated heating and cooling coils
- Air handling units with blocked filters
How the visit works
Our technicians bring everything the work needs, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. On site, the work takes half a day to a full day per unit, with large plant planned over several shifts. Before any visit in Rowley Green, we agree where the van can stop and how equipment reaches the system.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
How to prepare
- Dig out any earlier paperwork for the system
- Let us know when the site is closed or quiet
- Mention any parking or loading restrictions
Getting a quote
For a fixed quote, ring 0345 646 2711 or send us an email with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You’ll typically have a quote within one working day.
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About our AHU cleaning in Rowley Green
Think of an AHU clean as a full check-up for the ventilation. Every section is opened, cleaned and photographed, so the report shows exactly what was done. The work covers drain trays, internal panels and dampers and louvres, and the jobs we see most are blocked condensate drains and slimy trays and dust-coated heating and cooling coils.
London buildings often depend on air handling units in plant rooms or on the roof to supply fresh air. For a building in Rowley Green, dust settles in the units and ducts year after year.
The paperwork matters as much as the work. Each visit is written up with photos, covering the work done, any areas we couldn’t access and a recommended next date. File it in your maintenance log so it’s to hand when an insurer or inspector asks.
- Where
- Rowley Green (EN5)
- Wider area
- Greater London
- Paperwork
- Report and photos after the visit
- Price
- A fixed price before any work starts
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Looking after it afterwards
Here’s the after-treatment advice, short and simple:
- Report stiff or damaged access doors
- Do not ignore odours coming through the grilles
- Report water on the plant room floor
- Don’t store bins or materials near the intake
We recommend when the unit should next be inspected or cleaned, taking into account how dirty it was. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air instead of leaving it to guesswork.
What affects the cost of AHU cleaning
We quote each job individually. These are the things that affect it:
- Where the site is and how we reach it
- How easy every part is to reach
- Site requirements such as sign-in and permits
- A single visit or a regular plan
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we will go through it with you.
What to send for a quote
Before you ask for a quote, gather:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Where the site is and what kind of site it is
- Photos showing the whole system and its surroundings
- Your opening hours and when the area is out of use
Quoting starts with a diagnosis, either from pictures and details you send or from a site visit. After that, you get a fixed price for the work, before work begins.
What happens if it’s left?
Dirt left in an air handling unit doesn’t stay in the unit. It moves on into the ductwork and out into the rooms, so cleaning the ducts without the unit only goes so far. In Rowley Green, as across London, ductwork often passes through shared risers and other people’s space.
Putting the work off seldom saves money. Problems in a system tend to grow, and a neglected system can mean more work. If you are not sure what’s needed, call us on 0345 646 2711 or drop us a line for straight advice and a fixed quote.
Why us?
- One number for every site across the South East and London
- CHAS, SafeContractor and ISO 9001
- Ventilation hygiene specialists since 2009
- A fixed price before any work starts
Take a look at our cost guide and our accreditations.
When to call us in Rowley Green
An AHU’s intake draws in outdoor air and everything in it: dust, pollen, leaves and debris. The intake section and first filters take the brunt, and the finer material travels on.
Any of these means the system needs a check-up:
- Dirty filters cutting the airflow
- Fan sections that haven’t been cleaned in years
- Air handling units due a clean after building work
- Dirty coils holding back the airflow
For schools like Saffron Green Primary School, the holidays are the usual time to inspect and clean ventilation.
What to look for in a quote
- Whether the price is fixed
- Whether inaccessible sections are listed on the report
- Whether the quote is based on a survey or pictures
- When they can work, and whether that’s outside your opening hours
What your team can do, and what needs us
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, they should report it rather than try to fix it. We will take a look and send you a fixed quote.
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. Leave those to us.
What AHU cleaning looks like in Rowley Green
Food Standards Agency data includes about 13 schools, colleges and universities, about 11 care, childcare and hospital premises and about 4 hotels and guest houses within roughly a mile and a half of the centre of Rowley Green. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Ventilation cleaning in London buildings is normally planned for evenings or weekends. Barnet General Hospital is the nearest hospital, about 1.4 miles east of Rowley Green. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Healthcare buildings such as Barnet General Hospital, about 1.4 miles east, depend on their ventilation; if you manage a surgery, clinic or care home near Rowley Green, yours matters too.
Rowley Green is about 1 mile east of Borehamwood, in Greater London. Rowley Green gets the same approach as every site we work on: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with pictures. 764 places in Greater London are on our list, large and small. You can also see our page for London, roughly 13 miles from Rowley Green.
AHU cleaning in EN5 is surveyed, quoted and booked the same way as anywhere else. Nearby, we also carry out AHU cleaning in Arkley (1 mile south-east), Well End (1 mile north-west), Borehamwood (1 mile west), Deacon's Hill (2 miles south-west) and High Barnet (2 miles east). We also work in nearby towns such as London (13 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south-east), Kensington (11 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).
Local landmarks in Rowley Green
In Rowley Green, that means kitchens and buildings near Barnet Gate Wood and Elstree University Technical College, among other places. For rail, the closest station is Elstree & Borehamwood station, about 1.4 miles west. Nearby you’ll also find Hilfield Castle (3.8 miles west) and Barnet General Hospital (1.4 miles east). Open spaces near Rowley Green include Darland's Lake and Rowley Lodge Field.
Rowley Green: your questions answered
Can you clean school ventilation in Rowley Green during the holidays?
Yes. The holidays are the usual time for school work. Around Rowley Green, the Food Standards Agency lists about 13 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.
Do you work overnight in Rowley Green?
Yes, evening, overnight and weekend work is normal for us. It means the site in Rowley Green keeps running as normal. Tell us your opening hours when you ask for a quote.
What about areas you can’t get to?
Anything we can’t 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.
What do you clean inside the unit?
Every section that collects dirt: filters, coils, tray, fan and panels. The survey confirms what’s in your unit before we quote.
What do you do with what you remove?
We contain it and take it with us. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
Do you offer maintenance contracts?
Yes. Scheduled maintenance plans are part of what we do, set at the interval the system needs. The report from each visit recommends the next date.
Do you give a certificate after the clean?
Yes. You get a TR19® certificate plus before and after photos. They’re worth keeping with the plant records.
What does TR19 mean?
TR19® is the BESA specification for keeping ventilation systems clean. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.
Landlords, agents and facilities managers
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We can quote either party and send the paperwork to whoever needs it.
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements and we’ll come back with a fixed quote.