Hertfordshire · Air handling unit cleaning
Elstree AHU cleaning
Air handling unit cleaning for Elstree, with a survey first and a report with photos at the end. Ask us for a fixed quote.
- Filters that are clogged or overdue
- Dust-coated heating and cooling coils
- Drain trays holding standing water
How we handle AHU cleaning in Elstree
We clean the parts of the unit where dirt and moisture gather: filters, coils, drain trays, fans and the internal panels. You get a TR19® certificate and a photo report showing the unit before and after. The work covers internal panels, heating and cooling coils and supply and extract fans, and the jobs we see most are coils clogged with dust and debris and condensate trays that won’t empty.
For a building in or near Elstree, 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.
Good records are part of the job. Each visit is written up with photos, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s to hand when an insurer or inspector asks.
- Where
- Elstree (WD6)
- Wider area
- Hertfordshire
- Reporting
- Report and photos after the visit
- Price
- A fixed price before work begins
- When we work
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
In-house cleaning or a specialist?
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
Your own staff can handle the daily basics: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, and that is where we come in.
How the visit works
We turn up at the time agreed with you, often in the evening, overnight or at the weekend so the site keeps working. Anything that needs to be off for the work is switched off and left to cool first, and floors and nearby surfaces are sheeted. On site, it takes anything from half a day for one small unit to several shifts for a plant room full of them. Rural roads and tight entrances are worth telling us about before a visit to Elstree.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
How to prepare
- Mention any sign-in, permit or induction we need
- Plan for cooking equipment or plant to be off before we arrive
- Arrange a key holder or contact on site
Get a fixed quote
There’s no standard price list, because no two systems are the same. We look at your system first, from pictures or on a visit, and then send you a fixed quote. To get going, ring 0345 646 2711 or send us an email.
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Signs you need AHU cleaning in Elstree
Most units live out of sight on roofs, in plant rooms or in ceiling voids and are rarely seen by anyone but maintenance staff. Months can pass without anyone looking inside.
Most sites get in touch when they notice one of these:
- Condensate trays that won’t empty
- Fan sections that haven’t been cleaned in years
- Plant that needs cleaning after a refit
- Dirty coils holding back the airflow
If you manage a school such as St Nicholas Elstree Church of England VA Primary School, ventilation cleaning is best booked for the holidays.
Comparing quotes
- When the next visit should be, and why
- Proof of accreditation you can verify
- How areas they cannot reach will be recorded
- Whether the whole system is included, or only the parts that are easy to reach
How the job changes from site to site
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. The impeller, its housing and the fan chamber are cleaned.
Heating and cooling coils
Because cooling coils run wet, the dirt on them tends to cling. We clean the coil and the tray beneath it together.
What affects the quote in Elstree
We don’t publish a price list, because sites vary so much. What we look at:
- The scale of the work
- Parking and loading at the site
- When the work can happen, such as evenings, overnight or weekends
- Site rules, permits and inductions
We don’t list prices on the website, because the cost depends on the site in front of us. For a fixed quote, ring 0345 646 2711, or send details by email, and we’ll explain what it covers.
Asking for a quote
There’s no need for technical detail. It helps if you can send:
- Any access panels or hatches you can see
- Wide pictures of the system and the area around it
- Your last certificate, test record or report
- Where the plant sits or the system leaves the building, such as a roof or outside wall
The quickest way to a quote is to send photos: the system from a couple of angles, plus any access panels or hatches. Add the site type and your opening hours, and many jobs can be priced from that alone.
Places near Elstree
Other services in Elstree
Looking after it afterwards
How long the results last depends on use and care. We suggest:
- Book the next check in line with the report
- Keep filter changes on time and recorded
- Flag stale or damp smells in the supply air
- Report water on the plant room floor
Keep filter changes on schedule between cleans, as that does more than anything to keep the unit clean. Log every change so it’s easy to see when the next is due.
Don’t let leaves, litter or stored materials build up near the fresh air intake. What’s near the intake ends up in the unit.
Ventilation in Elstree buildings
Going by the FSA’s register, there are about 12 schools, colleges and universities and about 12 care, childcare and hospital premises serving food within 1.5 miles or so of the middle of Elstree. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. For Elstree, the closest hospital is Royal National Orthopaedic Hospital, roughly 0.8 miles south. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. Elstree is about 13 miles from central London, well within the area we cover across London and the South East. Visits are booked around your hours, evenings and weekends included.
If you run a surgery, dental practice or care home near Elstree, clean ventilation matters as much to you as to a hospital like Royal National Orthopaedic Hospital (about 0.8 miles south).
Elstree is about 2 miles south-west of Borehamwood, in Hertfordshire. For AHU cleaning in and around Elstree, it’s easy to get a fixed quote: please give us a ring on 0345 646 2711, or email photos. Our area covers London and the South East, including Elstree. We cover 381 places across Hertfordshire, from busy centres to quieter spots. For sites nearby, see our London page, about 13 miles away.
Every address in WD6 is within our area for AHU cleaning, from the main roads to the quietest streets. Local streets include High Street, West View Gardens and Summer Grove, and we cover them all for AHU cleaning. We also cover Deacon's Hill (1 mile east), Edgware Bury (1 mile south-east), Broadfields Estate (2 miles south-east), Borehamwood (2 miles north-east) and Edgware (2 miles south-east). Within a short drive, we also cover Watford (5 miles west), Hemel Hempstead (10 miles north-west), St Albans (8 miles north), Welwyn Garden City (12 miles north-east), Harpenden (12 miles north) and Hoddesdon (14 miles north-east).
What’s near Elstree
Locally, jobs take us to businesses close to The Holly Bush pub, London Academy and Aldenham Country Park. Elstree’s nearest station is Elstree & Borehamwood station, about 1.1 miles north-east of the centre. Well-known places in the area include Elstree and Borehamwood Museum (1.4 miles north-east) and Royal National Orthopaedic Hospital (0.8 miles south). For a walk, there’s Darland's Lake and Edgware Way Grassland.
Why deal with it now?
Tenants, auditors and owners may want proof that the air handling plant is kept clean. Our certificate and photo report give you clear evidence, ready to show anyone who asks. Equipment tucked in a roof space or outbuilding near Elstree rarely gets looked at unless someone books it.
No two sites are the same, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all play a part.
Why us?
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- We are fully insured
- Evenings, overnight and weekends, plus 24/7 emergency callout
- A fixed price before any work starts
Take a look at what affects the cost and our accreditations and certificates.
Elstree questions
Is Elstree within the area you cover?
Yes. Villages and rural sites across the South East are part of our work, Elstree included. The journey is planned ahead, so a few details about the route help.
Do you clean school ventilation in Elstree in the holidays?
Yes, holiday work suits schools best. Food Standards Agency records list about 12 schools, colleges and universities with registered kitchens within about a mile and a half of Elstree. You can give us a ring on 0345 646 2711 or use the quote form with the dates the site is empty.
Do you repair air handling units?
AHU cleaning is what we offer here, not mechanical repairs. Any faults we notice are recorded for your maintenance team to follow up.
What is TR19?
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.
Can you clean the ducts connected to the AHU?
Yes. Ductwork is cleaned through access panels, with anything inaccessible recorded, and new panels can be fitted.
Can we book visits on a schedule?
Yes, of course. Tell us what you have and how it’s used and we’ll propose a schedule with a fixed quote.
What do you do with what you remove?
We take it away at the end of the visit. While we work, it’s kept contained to keep the area clean.
How do you keep the site clean during the work?
With sheeting and covers, before anything else happens. We keep the work contained and clean down when we finish.