Surrey · Air handling unit cleaning
AHU Cleaning in Ash Green
AHU cleaning across Ash Green and nearby, timed so the site keeps working and signed off in writing with pictures.
- Debris and leaves in the fresh air intake
- Dirty filters cutting the airflow
- Odours coming through the supply air
Managing agents and facilities teams in Ash Green
For anyone managing more than one site, we can schedule visits across all of them on one quote. Every building has its own written report, so records stay tidy.
Running several sites is easier with one contractor. We cover South East England and London, so a run of sites can go into one programme and kept to a regular schedule.
AHU cleaning in Ash Green
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, so cleaning the unit matters as much as cleaning the ducts. The work covers supply and extract fans, internal panels and filter sections, and common reasons people get in touch are drain trays holding standing water and dirty fans and fan housings.
In rural areas, ventilation units are often in roof voids or outbuildings, where filters and drain trays get forgotten.
Nothing is signed off by word of mouth: a dated report with photos of the work, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. It shows what was done and what, if anything, couldn’t be reached.
- Location
- Ash Green (GU12)
- Wider area
- Surrey
- Records
- Photo report after each visit
- Quote
- A fixed price before we start
- Working hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
Aftercare tips
Think of this as the after-treatment advice, in brief:
- Report stiff or damaged access doors
- Book the next check in line with the report
- File each AHU report in the maintenance log
- Note any water around the unit or leaks below it
Keep filter changes on schedule between cleans, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
What AHU cleaning looks like in Ash Green
There are about 12 schools, colleges and universities and about 8 hospitals, care homes and childcare premises on the FSA’s food hygiene register within roughly a mile and a half of the centre of Ash Green. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Guildford Hospital is the nearest hospital, about 4.2 miles east of Ash Green. Clean air matters most where people are unwell, and that is as true in a care home as in a hospital. Ash Green is about 32 miles from central London, well within the area we cover across London and the South East. Evening, overnight and weekend visits are all possible.
For workplaces around Ash station with mechanical ventilation, cleaning can be done in the evening or at weekends. School buildings such as Ash Grange Primary School are typically done in the holidays, so classrooms are not disturbed.
Ash Green is about 2 miles east of Aldershot, in Surrey. Wherever you are in the GU12 postcode area, we can take on AHU cleaning. Across Surrey, we cover 395 places, and Ash Green is one of them. Our Guildford page covers sites nearby, about 6 miles away.
We work across GU12 for AHU cleaning and the roads nearby. We cover sites on Compass Rose Road, Drovers Way and Ash Green Lane East and nearby roads. Neighbouring places we cover for AHU cleaning include Ash (1 mile west), Tongham (1 mile south-west), Seale (1 mile south), Ash Vale (2 miles north-west) and Sandy Cross (2 miles south-west). Within a short drive, we also cover Guildford (6 miles east), Woking (8 miles north-east), Camberley (6 miles north), Farnham (4 miles south-west), Egham (15 miles north-east) and Frimley (5 miles north).
Around Ash Green
Around Ash Green, our work takes us to kitchens and buildings near The Dover Arms, The Connaught School and Ash Manor School. For rail, the closest station is Ash station, roughly 0.6 miles north-west of the centre. Well-known places in the area include Farnham Castle (4.4 miles west) and Guildford Hospital (4.2 miles east). For a walk, there’s Ash Ranges and Hog's Back.
What we are called out for in Ash Green
Filters that aren’t changed or cleaned on time clog up, cutting airflow and sometimes letting dirty air bypass them altogether. Then the rest of the unit takes the load.
Clients normally contact us after spotting one of these:
- Debris and leaves in the fresh air intake
- Air handling units never cleaned inside
- Coils clogged with dust and debris
- Plant that needs cleaning after a refit
Guildford Hospital, about 4.2 miles east, is the nearest hospital to Ash Green, and healthcare sites of every size need their supply air kept clean.
What to look for in a quote
- Whether they recommend a next date
- What’s included in the scope, part by part
- What insurance they carry
- Whether the price is fixed
What a clean will not put right
Before booking, it helps to know what’s not included:
- Leaking heating or cooling coils
- Dirty ducts beyond the unit itself
- Faulty motors, drives or bearings
Not sure which it is? You can give us a ring on 0345 646 2711, or send details by email and we’ll tell you honestly before booking.
Where we work
- Heating and cooling coils
- Supply and extract fans
- Drain trays
- Dampers and louvres
- Internal panels
- Filter sections
Part by part
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.
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.
Ash Green: your questions answered
Can a school’s ventilation in Ash Green be done out of term time?
Yes. Half-terms and the summer break are the natural time for school work. The FSA’s register shows about 12 schools and colleges with food registrations within roughly a mile and a half of Ash Green. Just call 0345 646 2711 or drop us a line with your term dates and we’ll plan around them.
Will you come out to Ash Green?
Yes. Villages and rural sites across the South East are part of our work, Ash Green included. Let us know about access, parking and anything unusual about getting there when you book.
Which accreditations do you hold?
Our accreditations are CHAS, SafeContractor and ISO 9001, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
When should our AHU next be cleaned?
Under TR19® Air, cleaning is led by inspection and risk rather than a set calendar. Each report suggests when the unit should next be looked at.
Will we get paperwork for the AHU clean?
Yes, both a certificate and a report with pictures. The report also suggests when the unit should next be inspected.
What do you need from me for a quote?
The site address, the type of premises and your opening hours, along with a few pictures and any previous report.
Does the AHU have to be shut down for cleaning?
Yes, for the time we are working on it. We can work evenings, overnight or at weekends so the building isn’t left without ventilation when it’s busy.
How much does AHU cleaning cost in Ash Green?
Size, condition, access and working hours all affect the cost. Call for a fixed quote and we will normally reply within one working day.
How it works
On the day, we arrive 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 before we start, and floors and nearby surfaces are sheeted. On site, it takes half a day to a full day per unit, with large plant planned over several shifts. Visits to a village like Ash Green are booked in advance, at a time that suits whoever runs the site.
- We agree a shutdown window that suits the building.
- 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.
- We take after photos and issue the certificate and report.
Before we arrive
- Tell us where we can park and unload
- Allow time for equipment near the work to be turned off and cool down
- Name a contact who can let us in at the agreed time
Getting a quote
Quoting starts with a diagnosis, from your photos and details or, where that isn’t enough, a survey on site. Then we send a fixed price so you know the cost before we start.
Advice
What affects the cost of AHU cleaning
Every site gets its own quote. These are the things that affect it:
- Whether we need access equipment or extra panels
- Working hours and out-of-hours timing
- Site requirements such as sign-in and permits
- How many systems or sites are involved
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. You will have a fixed price before we start.
Helping us quote
Many jobs can be priced from photos and some basics. Useful things to send:
- The postcode and the type of business
- The paperwork from the last visit, if you have it
- Your opening hours and when the area is out of use
- Any symptoms, from odd noises to smells or leaks
For AHU cleaning in Ash Green, call us on 0345 646 2711 or drop us a line. Let us know the site type and the opening hours, plus pictures or the previous report if they’re to hand. We typically send a fixed quote within one working day.