Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Letchworth, Hertfordshire
We cover Letchworth for air handling unit cleaning. Out-of-hours visits, a fixed quote and a written report with photos on every job.
- Dust-coated heating and cooling coils
- Intake sections clogged with outdoor debris
- Stale or musty smells from the ventilation
About our AHU cleaning in Letchworth
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 internal panels, heating and cooling coils and dampers and louvres, and common reasons people get in touch are dirty fans and fan housings and rooms that smell stuffy when the system runs.
In a town like Letchworth, ventilation cleaning normally means offices, schools, surgeries, care homes and leisure buildings. Each has supply and extract ductwork that collects dust and debris, and TR19® Air sets out how to inspect and clean them.
The report is your system’s health record: dated, with pictures, and showing what was done. For TR19® Grease cleans, the certificate comes through the BESCA Vent Hygiene Elite portal, ready for your insurer.
- Where
- Letchworth (SG6)
- Wider area
- Hertfordshire
- Paperwork
- Written report with photos
- Price
- Fixed quote, normally within a working day
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
Staff cleaning versus specialist work
Day-to-day cleaning is something your team can do: wiping canopies, washing grease filters and recording it in a log. Inside the ducts, risers and fan is specialist work, and that is where we come in.
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.
When to call us in Letchworth
An overdue filter loads up with dirt, cutting airflow and sometimes letting dirty air bypass them altogether. Then the rest of the unit takes the load.
What we are most often called out for:
- Drain trays holding standing water
- Units that have only ever had filter changes
- Air handling units with blocked filters
- Plant that needs cleaning after a refit
If you run an office near Letchworth Garden City station, its supply ductwork can gather dust for years before anyone looks inside.
Comparing quotes
- Whether the work can be done while the site is closed
- What paperwork you get at the end
- Whether the figure could change on the day
- How they set the interval to the next visit
Honest limits
To be straight with you, there are a few things this work won’t fix:
- Coils that are corroded or leaking and need replacing
- Ductwork downstream of the unit, which is a separate clean
- Controls and BMS settings that run the unit
Not sure which it is? You can give us a ring on 0345 646 2711 or use the quote form and we will tell you honestly before booking.
Parts of the system we cover
- Heating and cooling coils
- Supply and extract fans
- Drain trays
- Dampers and louvres
- Internal panels
- Filter sections
Between visits
How long the results last depends on use and care. We suggest:
- Store the TR19 paperwork where auditors can find it
- Clear leaves and litter away from the intake
- Plan the next inspection before the last report gets filed away
- Flag stale or damp smells in the supply air
Keep filter changes on schedule between cleans, because good filters protect everything downstream. Record each change in the maintenance log.
Check drain trays and condensate drains during routine maintenance. Catching a slow drain early stops standing water building up.
Common questions in Letchworth
Can you do AHU cleaning in Letchworth?
Yes. Our area runs across London and the South East, Letchworth included. A fixed quote normally follows within one working day of the survey details.
Do you work at weekends in Letchworth?
Yes, out-of-hours work is a big part of what we do. The site is handed back ready to open. Your opening times are the first thing we ask for.
Can you fix a faulty AHU?
The clean includes noting faults, but repairs sit with your maintenance contractor, with pictures where it helps.
How long does an AHU clean take?
As a guide, it takes a single shift for a typical unit, longer for large or heavily soiled ones. We plan the shutdown around that, out of hours if needed.
Do you offer maintenance contracts?
Yes, of course. Tell us what you have and how it’s used and we’ll propose a schedule with a fixed quote.
What if parts of the system cannot be reached?
They’re listed in the report, never skipped quietly. The report says which parts couldn’t be reached and why, along with a quote to put access in.
Can you clean the ducts connected to the AHU?
Yes. Ductwork is cleaned through access panels, and any sections we cannot reach are noted in the report, and new panels can be fitted.
Do you survey before quoting?
Yes, always. We diagnose before we treat: the survey shows what needs doing and what access we need, and the quote is based on that.
Places near Letchworth
More services for Letchworth
Different parts, different methods
Fans and fan sections
Every bit of air passes the fan, so a dirty fan sends dirt downstream. We clean the impeller, housing and surrounding section.
Filters
Dirty filters cut airflow and let dirt slip past their frames. We clean the frames and rails so the filters sit tight.
What AHU cleaning looks like in Letchworth
Food Standards Agency data includes about 18 schools, colleges and universities, about 25 hospitals, care homes and childcare premises and about 3 hotels and guest houses within about 1.5 miles of central Letchworth. Busy, occupied buildings like these are where clean supply air matters most. The nearest hospital to Letchworth is Fairfield Hospital, about 1.9 miles north-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. At about 34 miles from central London, Letchworth sits well inside the area we cover. Visits are booked around your hours, evenings and weekends included.
For schools like Hillshott Infant School and Nursery, the holidays are the usual time to inspect and clean ventilation. Hospitals such as Fairfield Hospital (about 1.9 miles north-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Letchworth are no different.
Letchworth is about 5 miles north of Stevenage, in Hertfordshire. We provide AHU cleaning for businesses, landlords and public buildings in Letchworth and the rest of Hertfordshire. Letchworth is one of 381 towns, villages and districts in Hertfordshire we cover for commercial clients. We also work in Milton Keynes, about 24 miles from Letchworth.
We work across the SG6 postcode area for AHU cleaning and the roads nearby. That includes premises on Station Road, Willian Church Road and Rowland Way and the roads around them. Main roads around Letchworth include the A505 and B656, which makes travel easy for evening and night visits. Close by, we work in Letchworth Garden City (1 mile west), Norton (1 mile north-east), Willian (1 mile south), Walsworth (2 miles south-west) and Poets Estate (2 miles south-west). Within a short drive, we also cover Stevenage (5 miles south), Welwyn Garden City (12 miles south), Harpenden (12 miles south-west), Hitchin (3 miles south-west), Hatfield (15 miles south) and Hertford (14 miles south-east).
Landmarks near Letchworth
We work in commercial kitchens and buildings around Norton School, The Highfield School and Three Magnets pub, among other places. There’s a railway station in Letchworth itself: Letchworth Garden City station. A little further out are Fairfield Hospital (1.9 miles north-west) and First Garden City Heritage Museum (within half a mile south). Not far away are Purwell Ninesprings.
What happens on the day
We turn up at the time agreed with you, which is often after service, overnight or at a weekend. Anything that needs to be off for the work is switched off and left to cool before work begins, and floors and nearby surfaces are sheeted. On site, it takes one overnight shift for many single units, with bigger plant phased. For a site in a town like Letchworth, tell us your opening hours, where we can park and how we reach the roof or plant.
- We look at the unit and the plant area during the survey.
- 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.
- We close every panel, hand the unit back and send the report and certificate.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Have your last certificate or report to hand
- Let us know how we reach the system, including roofs, risers and plant rooms
Get a fixed quote
There’s no standard price list, because every site is different. Instead, we look at your site first, from pictures or a survey, then send a fixed quote. To start, ring 0345 646 2711 or drop us a line.
Related advice
For landlords and multi-site operators
When the building owner and the occupier are different, it’s worth checking the lease for who maintains the systems. We’re happy to deal with either side, and the report can go to both.
Facilities teams in offices, schools and healthcare sites book us too across Hertfordshire. Work can be phased by floor, building or site around the people who use them.