Hampshire · Air handling unit cleaning
Air handling unit cleaning in Darby Green, Hampshire
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for commercial sites in Darby Green and across Hampshire. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Dirty coils holding back the airflow
- Drain trays holding standing water
- Dirty fans and fan housings
How the job changes from site to site
Rooftop and plant room units
Units on roofs and in plant rooms can be awkward to reach. We plan safe access as part of the survey so the quote reflects it.
Fans and fan sections
Before the fan is touched, the unit is shut down and made safe with your site team.
How we handle AHU cleaning in Darby Green
The fan pushes every bit of air in the system, so dirt on the impeller and housing gets spread around. Fan, housing and the surrounding panels are cleaned as part of the job, once the unit has been shut down and isolated. The work covers internal panels, drain trays and supply and extract fans, and people most often call us about filters that are clogged or overdue and units needing a clean before a new tenant or handover.
Somewhere as small as Darby Green, ducted ventilation is normally limited to a school, a care home, a surgery or a converted business building, wherever there is one, but where it’s fitted, it needs the same inspection and cleaning as anywhere.
Good records are part of the job. Each visit is written up with pictures, listing what was done, anything we couldn’t reach and when the next visit is due. Keep it with your fire safety records so it’s ready for an insurer, fire officer or EHO.
- Location
- Darby Green (GU17, GU46)
- Wider area
- Hampshire
- Records
- Photo report after every visit
- Quote
- A fixed quote up front
- When we work
- Overnight and weekend work, 24/7 emergency callout
- Call
- 0345 646 2711
- Checked
- 30 October 2026
Towns and villages near Darby Green
Other services in Darby Green
Landlords, agents and facilities managers
Landlords, managing agents and facilities managers book us, not only the businesses that use the systems. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we can quote for the whole system.
If you look after several sites, we can plan visits across the whole estate and price them together. Every building has its own written report, so each one has its own record.
Common problems we fix in Darby Green
Air handling units are normally tucked away on roofs, in plant rooms or above ceilings and are rarely seen by anyone but maintenance staff. It’s easy for a long time to go by without anyone opening the panels.
Signs it’s time to call us include:
- Odours coming through the supply air
- Debris and leaves in the fresh air intake
- Fan sections that haven’t been cleaned in years
- Plant that has been serviced but not cleaned
Healthcare ventilation, from large hospitals like Frimley Park Hospital (about 2.9 miles east) to small clinics, depends on clean filters, coils and ducts.
What to look for in a quote
- What records you will receive afterwards
- Whether the whole system is included, or only the parts that are easy to reach
- When they can work, and whether that is outside your opening hours
- Whether VAT is included
What happens if it’s left?
Facilities teams are often asked for evidence that the ventilation is looked after. A TR19® certificate and photo report give you that, ready to show anyone who asks. Systems in rural buildings are often out of sight and out of mind.
Kitchens, offices, schools and hospitals are all priced the same way: the size of the job, access, condition and working hours. Ask for a fixed quote and we will go through it with you.
What you get with us
- Each visit written up, with pictures
- CHAS, SafeContractor and ISO 9001
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- Full insurance on every job
Take a look at how cleaning jobs are priced and our accreditations and certificates.
Common questions in Darby Green
Can a school’s ventilation in Darby Green be done out of term time?
Yes, out-of-term visits are normal for schools. Food Standards Agency records list about 5 schools, colleges and universities with registered kitchens within about a mile and a half of Darby Green. Send us your term dates when you phone us on 0345 646 2711 or drop us a line, and we will fit the work in.
Is Darby Green within the area you cover?
Yes, Darby Green is part of our area, however small the site. A survey first, from pictures or a visit, means we arrive with the right kit.
How often should an air handling unit be cleaned?
That’s set by inspection, in line with TR19® Air. Units in heavy use or in sensitive buildings may need attention more often.
How do you protect the area?
Protection goes down first: sheeting over floors, worktops and anything close to the work. The area is left tidy, with our waste taken away.
What’s TR19?
TR19® is BESA’s specification for ventilation hygiene. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
What do you need from me for a quote?
A short description and a few pictures, with the address and opening hours. We will ask for anything else we need.
Is a quote from photos possible?
In many cases, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Where we can’t see enough, we arrange a survey.
What happens to the waste?
It leaves the site with us at the end of the visit. While we work, it’s kept contained so the area stays clean.
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 a single shift for a typical unit, longer for large or heavily soiled ones. If the van will struggle with a lane or gateway near Darby Green, let us know and we will plan around it.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters are dealt with as agreed, and the coils, fan and casing cleaned.
- Standing water and slime come out of the tray and the drain is checked.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Make sure someone can let us in and lock up afterwards
- Clear loose items from the work area
- Have your last certificate or report to hand
How to get a quote
Want a quote for AHU cleaning? Please phone us on 0345 646 2711 or email us with a few details about the site. We will explain what we’d do and send a fixed quote before anything is booked.
Related advice
What AHU cleaning looks like in Darby Green
Food Standards Agency records list about 5 schools, colleges and universities and about 7 care, childcare and hospital premises registered as food businesses in and around Darby Green, up to about a mile and a half out. Where buildings like these have air handling units, filters, coils and drain trays need regular attention. Darby Green’s nearest hospital, Frimley Park Hospital, is about 2.9 miles east. Healthcare ventilation is a good example of why supply ducts need inspecting: the air goes straight to patients. Darby Green is about 33 miles from central London, well within the area we cover across London and the South East. We work evenings, overnight and at weekends, so the visit fits around the site.
If you manage a school such as Potley Hill Primary School, ventilation cleaning is best booked for the holidays.
Darby Green is about 1 mile east of Yateley, in Hampshire. Every kind of commercial site in Darby Green, AHU cleaning is something we can help with. We can work out of hours so the site keeps running. We cover 683 places across Hampshire, large and small. You can also see our page for Reading, roughly 11 miles from Darby Green.
AHU cleaning in GU17 and GU46 follows the same survey, fixed quote and written report as everywhere else we cover. We cover sites on Green Lane, Stroud Lane and Reading Road and nearby roads. Close by, we work in Minley (1 mile south-west), Yateley (1 mile west), Little Sandhurst (2 miles north), Eversley Cross (3 miles west) and Eversley Centre (3 miles west). Larger places within reach include Basingstoke (14 miles west), Farnborough (3 miles south-east), Fleet (4 miles south), Aldershot (6 miles south), Alton (15 miles south-west) and Tadley (15 miles west).
What’s near Darby Green
In Darby Green, that means kitchens and buildings near Cricketers pub, Royal Military Academy Library and Frogmore Community College. Darby Green’s nearest station is Sandhurst station, about 1 mile north. Well-known places in the area include Hart Shopping Centre (3.9 miles south-west) and Frimley Park Hospital (2.9 miles east). For a walk, there’s Wildmoor Heath and Horseshoe Lake.
When something else is needed
We will always give you a straight diagnosis, so here’s what this work cannot put right:
- Leaking heating or cooling coils
- Ductwork downstream of the unit, which is a separate clean
- Problems with the unit’s controls or sensors
Not sure which it is? You can call us on 0345 646 2711 or send us an email and we will tell you honestly before booking.
What the work covers
- Filter sections
- Supply and extract fans
- Internal panels
- Drain trays
- Heating and cooling coils
- Dampers and louvres
What affects the quote in Darby Green
Some jobs are bigger than they look, and some smaller. The main factors:
- One-off work versus a regular cycle
- Access, including roofs, risers and ceiling voids
- Parking and loading at the site
- The times the site is available
What you pay reflects the actual work. That’s why we survey first, from photos or on site, and why the quote is fixed before any work starts.
What to send for a quote
To help us quote quickly, please include:
- Problems your staff have spotted
- Close-ups of filters, grilles, hatches or access panels
- Any previous report or certificate
- When the site is open and when it’s quiet
The quickest way to a quote is to send photos: wide shots of the system, close-ups of anything that worries you and how we’d get to it. Tell us what kind of site it is and when it’s open, and we can price many jobs without a visit.