Hertfordshire · Air handling unit cleaning
AHU Cleaning in Great Gaddesden
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Great Gaddesden, surveyed first and signed off with a written report and pictures. Call for a fixed quote.
- Dust-coated heating and cooling coils
- Filters that are clogged or overdue
- Intake sections clogged with outdoor debris
Between visits
Simple habits between visits make a real difference. Our advice:
- Clear leaves and litter away from the intake
- Report musty smells from the vents right away
- Look at the condensate drain whenever the unit is serviced
- Plan the next inspection before the last report gets filed away
The report suggests a date for the next inspection or clean, based on what we found. Under TR19® Air the timing is set by inspection and risk, not a fixed calendar.
Regular inspection under TR19® Air shows when cleaning is due, rather than waiting for a problem.
AHU cleaning in Great Gaddesden
Where a building in Great Gaddesden has had little more than filter changes, there may be dirt on the coils, fan and casing that nobody has looked at. A full clean deals with all of it. The work covers dampers and louvres, supply and extract fans and drain trays, and people most often call us about condensate trays that won’t empty and air handling units due a clean after building work.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, which makes them easy to overlook.
Accreditations are easy to claim and worth checking. We are a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, and we hold CHAS, SafeContractor and ISO 9001, with full insurance on top.
- Where
- Great Gaddesden (HP1)
- Wider area
- Hertfordshire
- Records
- Report and pictures after the visit
- Quote
- A fixed quote up front
- Working hours
- Evenings, overnight and weekends; 24/7 emergencies
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Leave it or put it right?
A slimy drain tray only gets worse. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Clearing it now is a much smaller job. Equipment tucked in a roof space or outbuilding near Great Gaddesden rarely gets looked at unless someone books it.
We don’t list prices on the website, because the cost depends on the site in front of us. For a fixed quote, call us on 0345 646 2711 or email us, and we’ll talk you through it.
What you get with us
- One number for every site across the South East and London
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Ventilation hygiene specialists since 2009
- Out-of-hours work and a 24/7 emergency line
What happens on the day
Your staff don’t need to do much on the day. A contact on site lets us in at the agreed time and points us to the system, and the rest is down to us. Before we leave, the area is tidied and the paperwork follows. If you can send photos, we can arrive in Great Gaddesden knowing what to expect.
- We start with a survey of the unit and a fixed quote for the work.
- The unit is shut down with your site team and the area protected.
- We clean or change the filters as agreed, then clean the coils, fan and internal panels.
- Drain trays are cleared and cleaned and the outlet checked.
- We close up the unit and send the certificate and before and after pictures.
Before we arrive
- Move anything stored near the system
- Tell us the best time to work, such as after service or at a weekend
- Make sure someone can let us in and lock up afterwards
Get a fixed quote
Every quote begins with a look at the system, from your pictures and details or, where that is not enough, a survey on site. After that, you get a fixed price for the work so you know the cost before we start.
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Landlords, agents and facilities managers
The Fire Safety Order 2005 puts the duty to manage fire risk on the responsible person, and that can be the employer, the owner, a landlord, a facilities manager or a managing agent. With shared responsibility, good records help everyone.
Keeping records across a portfolio is half the battle. Each visit ends with a dated report and photos, ready to show insurers, fire officers or EHOs.
What we’re called out for in Great Gaddesden
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 some travels further into the unit.
Keep an eye out for any of the following:
- Intake sections clogged with outdoor debris
- Blocked condensate drains and slimy trays
- Air handling units with blocked filters
- Coils clogged with dust and debris
If you manage a school such as Great Gaddesden Church of England Primary School, ventilation cleaning is best booked for the holidays.
What to look for in a quote
- Whether inaccessible sections are listed on the report
- If the quote is a fixed price or an estimate
- Whether the quote is based on a survey or pictures
- Proof of accreditation you can verify
Your questions about AHU cleaning in Great Gaddesden
Can the work in Great Gaddesden be done at night or at weekends?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in Great Gaddesden needn’t be disturbed. Tell us your opening hours when you ask for a quote.
Do you clean school ventilation in Great Gaddesden in 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 Great Gaddesden. Tell us your holiday dates and we’ll book the visit for when the site is empty.
How long does an AHU clean take?
Typically the clean 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 cover Great Gaddesden?
Yes. Great Gaddesden is part of the area we cover, as part of our area across London and the South East.
How much does AHU cleaning cost?
Size, condition, access and working hours all affect the cost. Ask us for a fixed quote, usually ready within one working day.
Is there a survey before the work?
Yes. Photos often do the job, and larger or hidden systems get a visit.
Do you offer emergency callouts?
Yes. Our emergency line runs 24/7, for problems that can’t wait. Call us any time and explain what’s happened.
How do you protect the area?
Protection goes down first: floor sheeting and covers over nearby surfaces and equipment. The area is left tidy, with our waste taken away.
How the job changes from site to site
Fans and fan sections
Build-up on fan blades can upset the balance and add wear. Cleaning keeps it running as intended.
Drain trays
A tray that does not drain becomes a pool of stagnant water in the airstream. We clean it and note if the slope or the drain needs attention.
What AHU cleaning looks like in Great Gaddesden
At about 27 miles from central London, Great Gaddesden sits well inside the area we cover. The visit is fixed around your opening hours, not ours. About 3.2 miles south-east of Great Gaddesden is Hemel Hempstead Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Healthcare ventilation, from large hospitals like Hemel Hempstead Hospital (about 3.2 miles south-east) to small clinics, depends on clean filters, coils and ducts.
Great Gaddesden is about 3 miles north-west of Hemel Hempstead, in Hertfordshire. From the centre of Great Gaddesden to the outskirts, we cover AHU cleaning for every kind of premises, from small sites to large estates. Great Gaddesden is one of 381 towns, villages and districts in Hertfordshire where we work for AHU cleaning. Our Milton Keynes page covers sites nearby, about 20 miles away.
Postcode districts we cover here for AHU cleaning: HP1. We cover sites on Church Meadow, Piper's Hill and Dagnall Road and nearby roads. We also cover Nettleden (1 mile south-west), Frithsden (1 mile south-west), Potten End (2 miles south-west), Fields End (2 miles south) and Ashridge (2 miles west). Further out, we also cover Watford (10 miles south-east), Hemel Hempstead (3 miles south-east), St Albans (8 miles east), Welwyn Garden City (14 miles east), Harpenden (7 miles east) and Hitchin (15 miles north-east).
What’s near Great Gaddesden
In Great Gaddesden, that means kitchens and buildings near John F Kennedy Catholic School and The Crown and Sceptre pub. The closest station to Great Gaddesden is Berkhamsted station, roughly 3 miles south-west. Well-known places in the area include Hemel Hempstead Hospital (3.2 miles south-east). Green spaces nearby include Landpark Wood.
Places near Great Gaddesden
More services for Great Gaddesden
Fixed quotes for AHU cleaning in Great Gaddesden
You’ll get a fixed price before we start. It’s based on:
- What state the system is in
- One-off work versus a regular cycle
- Travel, parking and unloading
- Site requirements such as sign-in and permits
What you pay reflects the actual work. That’s why every job is surveyed first, and why the quote is fixed before we start.
What we need to know
What to send for a quote:
- The times we could work without disrupting the site
- The site address and the type of premises
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- Detail shots of panels, filters and grilles
Here’s what helps us quote: the address, the type of site and when it’s open, pictures of the system and any previous report or certificate. Then call us on 0345 646 2711 or use the quote form.