Surrey · Air handling unit cleaning
Air handling unit cleaning in Wonersh, Surrey
AHU cleaning for Wonersh, from a team that has been trading since 2009. Out-of-hours visits and 24/7 emergency callout.
- Odours coming through the supply air
- Units needing a clean before a new tenant or handover
- Plant that has been serviced but not cleaned
What a clean won’t put right
An honest diagnosis matters more to us than a booking, so here’s what this work can’t put right:
- Ductwork downstream of the unit, which is a separate clean
- A system that’s undersized for the building
- Controls and BMS settings that run the unit
If in doubt, ring 0345 646 2711 or email us and we will say what we think before you book.
Parts of the system we cover
- Filter sections
- Internal panels
- Drain trays
- Heating and cooling coils
- Supply and extract fans
- Dampers and louvres
About our AHU cleaning in Wonersh
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. Anything that collects inside the unit can end up in the rooms it serves, so cleaning the unit matters as much as cleaning the ducts. Typical jobs include dust-coated heating and cooling coils and dirty fans and fan housings, across supply and extract fans, heating and cooling coils and filter sections.
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.
The paperwork matters as much as the work. You get a written report with photos after every visit, listing what was done, anything we couldn’t reach and when the next visit is due. File it in your maintenance log so it’s ready for an insurer, fire officer or EHO.
- Place
- Wonersh (GU5)
- Wider area
- Surrey
- Records
- Written report with photos
- Quote
- A fixed price before work begins
- Hours
- After hours by arrangement; emergencies any time
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
What we are called out for in Wonersh
Mechanical servicing keeps a unit running, but it doesn’t always include cleaning the inside. That means a unit can tick every service box and still be carrying years of dirt.
Clients normally contact us after spotting something like this:
- Coils clogged with dust and debris
- Condensate trays that won’t empty
- Filters that are clogged or overdue
- Plant that has been serviced but not cleaned
Wherever a school like Bramley CofE Aided Infant School and Nursery has ducted ventilation, a half-term visit keeps the work out of lesson time.
Comparing quotes
- When they can work, and whether that is outside your opening hours
- How VAT is shown on the quote
- Whether the whole system is included, or only the parts that are easy to reach
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
Between visits
So the system stays in good health:
- Plan the next inspection before the last report gets filed away
- Keep filter changes on time and recorded
- Report musty smells from the vents straight away
- Report stiff or damaged access doors
If the ductwork hasn’t been cleaned, consider it next. Cleaning the unit and ducts together gives the best result, and we can quote for both.
Do not let leaves, litter or stored materials build up near the fresh air intake. What’s near the intake ends up in the unit.
Towns and villages near Wonersh
Also in Wonersh
How the visit works
We’re used to working while the site is closed. Evenings, nights and weekends are when much of our work happens, so a kitchen or building can carry on as usual the next day. On site, the work takes from a few hours for a compact unit to a day or more for a large one. Seeing the system in pictures first means the trip to Wonersh can be planned properly.
- The survey covers the unit, its access and how it can be shut down.
- We sheet the area and the unit is isolated.
- Each section is cleaned of dust, debris and slime.
- Coils and trays are cleaned and the condensate drain cleared.
- We close every panel, hand the unit back and send the report and certificate.
Getting ready for the visit
- Agree a time when the area can be out of use
- Tell us about site rules, permits or sign-in
- Clear the space around the work
Ask for a quote
Photos are enough for some jobs, while others need a look on site. Larger sites, and anything hidden behind walls, ceilings or floors, are normally surveyed first. Either way, the quote is fixed before any work is booked.
Read more
AHU cleaning in Wonersh: local notes
Going by the FSA’s register, there are about 7 schools, colleges and universities and about 4 caring premises (care homes, nurseries and hospitals) serving food in Wonersh and the streets around it, up to about 1.5 miles out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. We cover Wonersh, about 28 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. St. Luke’s Hospital is the nearest hospital, about 2.8 miles north of Wonersh. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Healthcare ventilation, from large hospitals like St. Luke’s Hospital (about 2.8 miles north) to small clinics, depends on clean filters, coils and ducts.
Wonersh is about 4 miles south of Guildford, in Surrey. Every kind of commercial site in Wonersh, we can take on AHU cleaning. Visits can be booked for evenings, overnight or weekends so the site keeps running. 395 places in Surrey are on our list, large and small.
We cover every part of GU5 for AHU cleaning and the roads nearby. You will find streets such as The Street, Woodyers Close and The Close, all of which we cover for AHU cleaning. Close by, we work in Bramley (1 mile west), Shamley Green (1 mile south-east), Birtley Green (1 mile south), Stroud Common (2 miles south-east) and Grafham (2 miles south). Further out, we also cover Guildford (4 miles north), Woking (8 miles north), Camberley (12 miles north-west), Epsom (15 miles north-east), Farnham (11 miles west) and Reigate (15 miles east).
Landmarks near Wonersh
Around Wonersh, our work takes us to kitchens and buildings near Shalford Mill, Broadwater School and The Grantley Arms Public House. The closest station to Wonersh is Chilworth station, roughly 1.5 miles north-east of the centre. Well-known places in the area include Surrey Police Museum (2.6 miles north-west) and Guildford Castle (2.9 miles north-west). Not far away are St Martha's Hill and Silent Pool.
How we price AHU cleaning
There’s no set price list, because sites vary so much. The quote depends on:
- The size of the system
- Travel, parking and unloading
- Any permits to work or inductions
- The condition we find in the survey
Whatever the type of site, the quote works the same way: how much there is, how we reach it, what state it’s in and when we can work. Ask for a fixed quote and we will go through it with you.
Helping us quote
To speed up the quote, please include:
- Wide photos of the system and the area around it
- Your opening hours and when the area is out of use
- The paperwork from the last visit, if you have it
- Any symptoms, from odd noises to smells or leaks
For a fixed quote, phone us on 0345 646 2711 or use the quote form with the site type, your trading hours and a short description of the system. A few photos and your last certificate or report help a lot. You’ll normally have a quote within one working day.
What your team can do, and what needs us
Logging matters as much as cleaning. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
Day-to-day cleaning is something your team can do: wiping down canopy surfaces, cleaning filters and keeping a simple log. Inside the ducts, risers and fan is specialist work, which is where we come in.
Your questions about AHU cleaning in Wonersh
Do you work at weekends in Wonersh?
Yes, nights and weekends are routine for us. Your customers, staff or residents in Wonersh needn’t be disturbed. Your opening times are the first thing we ask for.
Can a school’s ventilation in Wonersh be done out of term time?
Yes, and it’s the easiest time to do it. The FSA’s register shows about 7 schools and colleges with food registrations within roughly a mile and a half of Wonersh. Booking early in the term gives the best choice of holiday dates.
What’s included in an AHU clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. We confirm the scope after looking at the unit.
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 for anything urgent, ring our 24/7 emergency line.
Do you offer emergency callouts?
Yes, 24/7. Office hours are Monday to Friday, 8am to 6pm, with the emergency line covering every other hour.
How long will the unit be out of action?
As a guide, it takes from a few hours for a compact unit to a day or more for a large one. We plan the shutdown around that, including evenings or weekends.
What information do you need?
The site address, the type of premises and your opening hours, plus pictures of the system and your last certificate or report if you have one.
Will you repair the fan or motor?
The clean includes noting faults, but repairs sit with your maintenance contractor, with pictures where it helps.
Leave it or put it right?
A clean unit feeds cleaner air into the ductwork, so the whole system stays cleaner for longer. It also means the next inspection has less to find. Planning a trip to Wonersh ahead is easier for everyone than a rushed one.
What you pay reflects the actual work. That is why we survey first, from photos or on site, and the price is agreed before we start.
What you get with us
- CHAS, SafeContractor and ISO 9001
- Fully insured
- Member of BESCA Vent Hygiene Elite, cleaning to BESA TR19® Grease
- Photo reports with every job
Read how cleaning jobs are priced or how to check a contractor.