Surrey · Air handling unit cleaning
AHU Cleaning in Green Cross
Professional AHU cleaning in and around Green Cross, timed so the site keeps working and signed off in writing with pictures.
- Filters that are clogged or overdue
- Drain trays holding standing water
- Stale or musty smells from the ventilation
What staff can safely do
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they don’t reach the grease that builds up further in. Reaching it takes a specialist with the right equipment.
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that won’t come clean, it’s best reported rather than tackled in-house. We can diagnose it and quote.
AHU cleaning in Green Cross, done properly
Coils are where a lot of the dirt ends up. Dirt on the fins holds back air and makes the unit work harder to do the same job. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. Common call-outs are for rooms that smell stuffy when the system runs and intake sections clogged with outdoor debris, on internal panels, filter sections and dampers and louvres.
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.
Good records are part of the job. You get a written report with photos after each visit, 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 to hand when an insurer or inspector asks.
- Location
- Green Cross (GU10)
- Wider area
- Surrey
- Paperwork
- Photo report after every visit
- Quotes
- A fixed price before work begins
- Working hours
- Out of hours as standard, 24/7 emergency line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Part by part
Filters
Every AHU relies on its filters to catch dust before it reaches the coils. We check them, and clean or change them as agreed in the quote, and clean the filter housing.
Rooftop and plant room units
Rooftop units take the weather, and intakes can collect leaves and debris. The intake section gets particular attention.
Why deal with it now?
A clogged coil or dirty fan makes the unit work harder for the same airflow. That means more wear on the motor and rooms that feel less fresh, and a clean on your terms beats a breakdown on nobody’s. Out of sight is the usual reason a rural system goes too long without attention.
One small site or a whole estate, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before work begins.
Why Green Cross businesses choose us
- One number for every site across the South East and London
- Fully insured
- In business since 2009
- Fixed quotes, normally within one working day
Take a look at what affects the cost or our accreditations.
FAQs for Green Cross
Do you work overnight in Green Cross?
Yes, we can come after you close and finish before you open. Your customers, staff or residents in Green Cross needn’t be disturbed. Tell us your opening hours when you ask for a quote.
Will you come out to Green Cross?
Yes, smaller places are covered as well as towns. A survey first, from pictures or a visit, means we arrive with the right kit.
Is a quote from pictures possible?
In many cases, yes. With good pictures, the site type and your last report, we can price many jobs. Where we cannot see enough, we arrange a survey.
What do you do to protect the area?
We cover floors and nearby surfaces with sheeting before any work starts, and waste is contained as we go. Before we leave, we tidy up and clean down.
What information do you need?
A short description and a few pictures, with the address and opening hours. We will ask for anything else we need.
What happens to the waste?
We take it away at the end of the visit. During the work, it’s contained so the area stays clean.
Will the ventilation be off while you clean?
Yes. Cleaning needs the unit off and isolated, so we plan it for a time that suits the building.
What does AHU cleaning cost?
It depends on the site, so we quote each one individually. For a quote, call 0345 646 2711 or drop us a line with the site type, opening hours and a few photos.
Green Cross buildings and their air
The FSA’s food hygiene register lists about 3 care, childcare and hospital premises with registered kitchens or food service within 1.5 miles or so of the middle of Green Cross. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Green Cross’s nearest hospital, Haslemere and District Hospital, is about 3.8 miles south-east. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. At about 38 miles from central London, Green Cross sits well inside the area we cover. The visit is fixed around your opening hours, not ours.
Hospitals such as Haslemere and District Hospital (about 3.8 miles south-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Green Cross are no different.
Green Cross is about 5 miles south of Farnham, in Surrey. Every kind of commercial site in Green Cross, AHU cleaning is something we can help with. We can work out of hours so the site keeps running. Across Surrey, we cover 395 places, and Green Cross is one of them. Guildford is in our area too, about 11 miles from Green Cross.
All of GU10 is within our area for AHU cleaning, from the main roads to the quietest streets. Nearby, we also carry out AHU cleaning in Churt (1 mile west), Whitmoor Vale (1 mile south-west), Beacon Hill (1 mile south-east), Barford (1 mile south-west) and Crosswater (1 mile north-west). Larger places within reach include Guildford (11 miles north-east), Woking (15 miles north-east), Camberley (14 miles north), Farnham (5 miles north), Frimley (12 miles north) and Haslemere (4 miles south-east).
Near you in Green Cross
Around Green Cross, our work takes us to kitchens and buildings near Crossways Inn and The Flashes. The nearest railway station is Haslemere station, roughly 3.7 miles south-east. Other landmarks nearby include Haslemere and District Hospital (3.8 miles south-east). The countryside around Green Cross includes Gibbet Hill and Farnham Heath.
Looking after it afterwards
Aftercare is simple, and it helps at the next visit:
- Stick to the filter change plan
- Watch for drips or damp patches near the plant
- Keep the area around the fresh air intake clear
- Flag stale or damp smells in the supply air
Restart the unit with your site team or maintenance contractor once we have finished. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Have the unit inspected regularly, in line with the risk-based approach of TR19® Air, rather than waiting for a problem.
What happens on the day
When we arrive, we check the system against the survey or the photos you sent. If anything is different, we talk it through with the person on site before carrying on. From there, it takes one overnight shift for many single units, with bigger plant phased. Somewhere as small as Green Cross, the date and timings are agreed with you well before the day.
- First the unit is surveyed, from photos or a visit, and the scope agreed.
- With your site team, the unit is switched off and isolated, then the area around it 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 photos.
Getting ready for the visit
- Tell us where we can park and unload
- Clear loose items from the work area
- Agree a time when the area can be out of use
Get a fixed quote
The quickest way to a quote is to send pictures: the system from a couple of angles, plus any access panels or hatches. Tell us what kind of site it is and when it’s open, and we can price many jobs without a visit.
Advice
Multi-site and managed buildings
When the building owner and the occupier are different, the lease normally sets out who maintains what. We are happy to deal with either side and send the paperwork to whoever needs it.
Multi-site operators often want one contractor and one number. We cover South East England and London, so visits at different addresses can be planned together and kept on a regular cycle.
Towns and villages near Green Cross
Also in Green Cross
When to call us in Green Cross
Most units live out of sight on roofs, in plant rooms or in ceiling voids, so they’re easy to forget about. It’s easy for a long time to go by without anyone opening the panels.
Look out for any of the following:
- Air handling units due a clean after building work
- Dust built up on fan impellers
- Blocked condensate drains and slimy trays
- Filters that are clogged or overdue
School buildings such as St John's CofE Aided Infant School are usually done in the holidays, so classrooms aren’t disturbed.
Questions to ask before booking
- What records you will receive afterwards
- When the next visit should be, and why
- Whether the quote is based on a survey or photos
- Whether the whole system is included, or only the parts that are easy to reach