Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Widford, Hertfordshire
Our technicians work in Widford on AHU cleaning. Out-of-hours visits, a fixed quote and a written report with pictures on every job.
- Intake sections clogged with outdoor debris
- Units needing a clean before a new tenant or handover
- Dirty fans and fan housings
For landlords and multi-site operators
We regularly work with managing agents. Tell us the site, the work and the access arrangements and we will come back with a fixed quote.
We work for landlords, managing agents and facilities managers as well as the people running the site. Shared systems, like a riser serving several units, need a clear agreement on who books the work, and we are happy to quote for all of it.
AHU cleaning in Widford
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. The work covers supply and extract fans, dampers and louvres and filter sections, and people most often call us about dirty fans and fan housings and blocked condensate drains and slimy trays.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
The sign-off is always in writing: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Where
- Widford (SG12)
- Wider area
- Hertfordshire
- Records
- Report and pictures after the visit
- Quote
- A fixed quote up front
- Working hours
- Nights, weekends or holidays to suit you
- Call
- 0345 646 2711
- Page updated
- 30 October 2026
Part by part
Drain trays
A tray that doesn’t drain becomes a pool of stagnant water in the airstream. We clean it and note if the slope or the drain needs attention.
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. We protect the area below before opening them.
Staff cleaning versus specialist work
Away from the kitchen, the in-house job is mainly checking: keeping grilles clear, noting unusual noise or smells and logging filter changes. The inside of ducts and units needs a specialist.
Staff cleaning and specialist work aren’t the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but they do not reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
What happens on the day
Protection comes first: floors, worktops and anything near the work are covered. After that, the system is made safe and the work begins. The work on site takes anything from half a day for one small unit to several shifts for a plant room full of them, and the area is cleaned down before we leave. Somewhere as small as Widford, the date and timings are agreed with you well before the day.
- We look at the unit and the plant area during the survey.
- We sheet the area and the unit is isolated.
- Dirt and debris are removed from each section.
- We clean the coils and clear the tray and drain.
- We close every panel, hand the unit back and send the report and certificate.
Preparing for the visit
- Dig out any earlier paperwork for the system
- Arrange a key holder or contact on site
- Tell us where we can park and unload
How to get a quote
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, the quote is fixed before any work is booked.
Related advice
AHU cleaning in Widford: local notes
Widford, about 23 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours. About 3.7 miles south of Widford is Princess Alexandra Hospital, the nearest hospital. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients.
Healthcare buildings such as Princess Alexandra Hospital, about 3.7 miles south, depend on their ventilation; if you manage a surgery, clinic or care home near Widford, yours matters too. Wherever a school like Widford School has ducted ventilation, a half-term visit keeps the work out of lesson time.
Widford is about 4 miles east of Ware, in Hertfordshire. We provide AHU cleaning for businesses, landlords and public buildings in Widford and the rest of Hertfordshire. Widford is one of 381 towns, villages and districts in Hertfordshire we cover for AHU cleaning. Our Chelmsford page covers sites nearby, about 19 miles away.
We work across the SG12 postcode area for AHU cleaning and the roads nearby. Streets in the area include High Street, Bell Lane and Priory Farm Yard, and we cover them all for AHU cleaning. We also cover Nether Street (1 mile north-east), Hunsdon (1 mile south), Hunsdonbury (1 mile south), Wareside (1 mile west) and Babbs Green (2 miles west). Further out, we also cover Stevenage (12 miles north-west), Bishop's Stortford (5 miles north-east), Welwyn Garden City (11 miles west), Hoddesdon (6 miles south-west), Cheshunt (9 miles south-west) and Hatfield (13 miles west).
Near you in Widford
We work in commercial kitchens and buildings around The Bell Inn On The Corner Of Bell Lane, among other places. The nearest railway station is Harlow Town station, about 3.2 miles south-east. Other landmarks nearby include Princess Alexandra Hospital (3.7 miles south) and Harlow Mill (3.7 miles south-east). For a walk, there’s Hunsdon Mead.
What AHU cleaning can’t fix
Before booking, it helps to know what’s not included:
- The supply and extract ducts, quoted separately
- A system that’s undersized for the building
- Leaking heating or cooling coils
If you’re not sure, just phone us on 0345 646 2711 or send us an email and we’ll give you a straight answer.
Where we work
- Heating and cooling coils
- Internal panels
- Filter sections
- Drain trays
- Dampers and louvres
- Supply and extract fans
What affects the quote in Widford
There’s no set price list, because sites vary so much. What we look at:
- The number of sites or systems
- A single visit or a regular plan
- How easy every part is to reach
- Site requirements such as sign-in and permits
The price reflects the work, not guesswork. That is why every job is surveyed first, and why the quote is fixed before work begins.
Helping us quote
There’s no need for technical detail. Just send:
- The times we could work without disrupting the site
- Any symptoms, from odd noises to smells or leaks
- Wide pictures of the system and the area around it
- The paperwork from the last visit, if you have it
If you need AHU cleaning in Widford, give us a ring on 0345 646 2711 or send us an email. Tell us what kind of premises it is and when it’s open, and send pictures or your last report if you can. A fixed quote usually follows within one working day.
Why act early in Widford
Cleaning a unit while it only has light dust is quick. Years of build-up make the job longer and harder, particularly where damp has made it stick. In a small place like Widford, a system that fails can take a site out of use.
The cost depends on the size of the system, the condition it’s in and how easy it is to reach. We give you a fixed price before any work starts, so there are no surprises.
What you get with us
- Full insurance on every job
- A fixed price before any work starts
- Survey first, then a fixed quote
- Each visit written up, with photos
Places near Widford
More services for Widford
Common questions in Widford
Can you come to Widford after we close?
Yes, nights and weekends are routine for us. It means the site in Widford keeps running as normal. Let us know the hours you are closed and we will book within them.
Can you clean school ventilation in Widford during the holidays?
Yes, and it’s the easiest time to do it. Food Standards Agency records list about 2 schools, colleges and universities with registered kitchens within about a mile and a half of Widford. Booking early in the term gives the best choice of holiday dates.
Do you need to switch the unit off?
Yes. We cannot clean a running unit, so it’s switched off and made safe first. The shutdown is planned with whoever runs the building.
How far ahead should we book?
It depends on the time you need and how big the job is. Mention your preferred dates with your enquiry, and if it’s an emergency, call us any time.
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.
How much does AHU cleaning cost in Widford?
Size, condition, access and working hours all affect the cost. Ask us for a fixed quote and we will normally reply within one working day.
Which parts of an air handling unit do you clean?
Every section that collects dirt: filters, coils, tray, fan and panels. We confirm the scope after looking at the unit.
Which accreditations do you hold?
Our accreditations are CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.