Hertfordshire · Air handling unit cleaning
Air handling unit cleaning in Holwell, Hertfordshire
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for businesses, landlords and public buildings in Holwell. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Air handling units never cleaned inside
- Plant that needs cleaning after a refit
- Condensate trays that won’t empty
Why it’s worth doing now in Holwell
Facilities teams are often asked for evidence that the ventilation is looked after. Our certificate and photo report give you clear evidence, ready to show anyone who asks. Equipment tucked in a roof space or outbuilding near Holwell rarely gets looked at unless someone books it.
Several systems or sites on one quote can make for a more efficient booking. Tell us about everything you’d like looked at and we’ll price it together.
Why us?
- Trading since 2009
- Photo reports with every job
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Fixed quotes, usually within one working day
Read our cost guide or our accreditations.
How we handle AHU cleaning in Holwell
Every supply and extract system relies on the air handling unit at its centre: air is pulled in, filtered, conditioned and sent out through the ducts. Whatever builds up inside it travels with that air, which is why we clean the unit itself, not just the ducts. If you’re dealing with dirty fans and fan housings and intake sections clogged with outdoor debris, we can help, from drain trays, internal panels and heating and cooling coils onwards.
In rural areas, ventilation units are often in roof voids or outbuildings, which makes them easy to overlook.
We’ve 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’re fully insured.
- Where
- Holwell (SG5)
- Wider area
- Hertfordshire
- Records
- Report and photos after the visit
- Quote
- Fixed quote, normally within a working day
- When we work
- Nights, weekends or holidays to suit you
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
Keeping the system healthy
Simple habits between visits make a real difference. We recommend:
- Clear leaves and litter away from the intake
- Report musty smells from the vents straight away
- Report water on the plant room floor
- Stick to the filter change plan
Once the clean is done, we send a TR19® certificate and a report with before and after photos. They belong in the plant or maintenance log.
Change or clean filters on time. Overloaded filters let more dirt through to the coils and fan.
Questions from Holwell
Will you come out to Holwell?
Yes. Villages and rural sites across the South East are part of our work, Holwell included. Just mention lanes, gates or anything else about the site when you book.
Can ventilation in schools around Holwell be cleaned out of term?
Yes. Half-terms and the summer break are the natural time for school work. Food Standards Agency records list about 2 schools, colleges and universities with registered kitchens within about a mile and a half of Holwell. You can call 0345 646 2711 or drop us a line with the dates the site is empty.
Will you repair the fan or motor?
Mechanical repairs to the unit are for your HVAC maintenance contractor. We clean the unit and report anything we see that needs attention.
What information do you need?
Only a few details: the address, the site type, your opening hours and how we reach the system. Photos and the last report help too. After that, simply call us on 0345 646 2711 or drop us a line.
Do you have a 24/7 line?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line, and we will advise on what to do next.
Can you clean the AHU out of hours?
Yes. Evening, overnight and weekend work is all possible, so the building keeps running in the day.
Do you offer maintenance contracts?
Yes. We run scheduled maintenance contracts, with visits at the interval your system needs. The report from each visit recommends the next date.
What happens if you can’t reach some of it?
They’re listed in the report, never skipped quietly. The report says which parts couldn’t be reached and why, and we can quote to improve the access.
Holwell buildings and their air
For Holwell, the closest hospital is Fairfield Hospital, roughly 2.7 miles north-east. 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 Holwell, about 35 miles from central London, as part of our work across London and the South East. The visit is fixed around your opening hours, not ours.
School buildings such as The Priory School are usually done in the holidays, so classrooms aren’t disturbed. If you run a surgery, dental practice or care home near Holwell, clean ventilation matters as much to you as to a hospital like Fairfield Hospital (about 2.7 miles north-east).
Holwell is about 3 miles north-west of Hitchin, in Hertfordshire. We carry out AHU cleaning for businesses, landlords and public buildings in Holwell and the rest of Hertfordshire. Holwell is one of 381 places in Hertfordshire where we work for AHU cleaning. Our Milton Keynes page covers sites nearby (20 miles or so).
All of SG5 is within our area for AHU cleaning, from the main roads to the quietest streets. That includes premises on Gurney's Lane, Pirton Road and Rand's Meadow and the roads around them. If your site is just outside Holwell, we cover Pirton (2 miles south-west), Shillington (3 miles west), Apsley End (3 miles west), Hanscombe End (3 miles west) and Pegsdon (3 miles south-west). Larger places within reach include Stevenage (7 miles south-east), Welwyn Garden City (14 miles south), Harpenden (12 miles south), Hitchin (3 miles south-east), Letchworth (3 miles east) and Letchworth Garden City (3 miles east).
What’s near Holwell
The nearest railway station is Hitchin station, roughly 2.8 miles south-east of the centre. Other landmarks nearby include Wymondley Castle (4.3 miles south-east) and Fairfield Hospital (2.7 miles north-east). Not far away are Markham's Hill and Oughtonhead Nature Reserve.
What we do, step by step
Your trading hours come first. We book the visit for a time the area is closed, whether that is an evening, overnight or a weekend. Once we’re in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes one overnight shift for many single units, with bigger plant phased. Somewhere as small as Holwell, the date and timings are agreed with you well before the day.
- First we agree when the unit can be switched off, including evenings or weekends.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- After photos are taken and the certificate issued.
Preparing for the visit
- Arrange a key holder or contact on site
- Let us know about parking and loading
- Clear loose items from the work area
Ask for a quote
To get a fixed quote, call us on 0345 646 2711 or use the quote form with the site type, your trading hours and a short description of the system. Photos and the last report, if you have one, make the quote quicker. You will normally have a quote within one working day.
Related advice
How the job changes from site to site
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. A clean fan runs more smoothly.
Drain trays
Older trays can corrode and start leaking. Their condition goes into the report with pictures so repairs can be planned.
What a clean won’t put right
In fairness, some problems need a different fix:
- Mechanical faults with motors, belts or bearings
- Controls and BMS settings that run the unit
- Leaking heating or cooling coils
Not sure which it is? You can call 0345 646 2711, or email photos and we’ll tell you honestly.
Parts of the system we cover
- Drain trays
- Dampers and louvres
- Internal panels
- Supply and extract fans
- Heating and cooling coils
- Filter sections
Landlords, agents and facilities managers
Records are where multi-site compliance often slips. Each visit ends with a dated report and photos, ready to show insurers, fire officers or EHOs.
Managing agents often deal with us directly. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
Towns and villages near Holwell
Also in Holwell
What staff can safely do
A few tasks are always specialist work: entering ducts, working on fans, testing dampers and taking grease readings call for the right kit, training and safe access. Leave those to us.
In-house cleaning and specialist cleaning do different jobs. 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. That part needs specialist access and equipment.