Surrey · Air handling unit cleaning
Air handling unit cleaning in Sheet's Heath, Surrey
AHU cleaning in Sheet's Heath from ventilation hygiene specialists trading since 2009. Evenings, overnight and weekends, plus a 24/7 emergency line.
- Air handling units with blocked filters
- Plant that has been serviced but not cleaned
- Dirty coils holding back the airflow
How we handle AHU cleaning in Sheet's Heath
Where a building in Sheet's Heath 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. Common call-outs are for rooms that smell stuffy when the system runs and dirty fans and fan housings, on supply and extract fans, filter sections and dampers and louvres.
In a village or hamlet like Sheet's Heath, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
Nothing is signed off by word of mouth: a written report, dated and illustrated with pictures, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. Any parts we couldn’t reach are recorded on it too.
- Location
- Sheet's Heath (GU24)
- Wider area
- Surrey
- Records
- Written report with pictures
- Quote
- A fixed price before work begins
- Hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
Part by part
Drain trays
The drain tray collects water from the cooling coil. We clear standing water, clean out slime and check the outlet is draining.
Filters
Filters are the first line of defence in the unit. As part of the clean, filters are checked and cleaned or replaced as agreed, and clean the filter housing.
Signs you need AHU cleaning in Sheet's Heath
Planned maintenance often covers belts, motors and filters but not cleaning. So a unit can be well maintained and still dirty.
Any of these means the system needs a check-up:
- Blocked condensate drains and slimy trays
- Dirty coils holding back the airflow
- Air handling units due a clean after building work
- Odours coming through the supply air
Hospitals such as Brookwood Hospital (about 0.9 miles east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Sheet's Heath are no different.
What your quote should include
- How VAT is shown on the quote
- Proof of insurance
- Whether the whole system is included, or only the parts that are easy to reach
- Whether a written report and photos are included
Managing agents and facilities teams in Sheet's Heath
Facilities teams in offices, schools and healthcare sites book us too across Surrey. Larger estates can be phased building by building around the people who use them.
Where a tenant occupies the premises but the landlord owns the building, it’s worth checking the lease for who maintains the systems. We can quote either party, and the report can go to both.
What your team can do, and what needs us
When your team notices a problem between visits, like drips, unusual noise, smells or damaged filters, it’s best reported rather than tackled in-house. We will take a look and give you a fixed quote.
In-house cleaning and specialist cleaning do different jobs. Wiping filters daily and washing them weekly keeps the visible parts in order, but they do not reach the grease that builds up further in. That part needs specialist access and equipment.
Keeping the system healthy
To keep the system working properly between visits:
- Don’t store bins or materials near the intake
- Book the next check in line with the report
- File each AHU report in the maintenance log
- Keep inspection doors on the unit in good order
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.
Check drain trays and condensate drains during routine maintenance. A drain that’s cleared early never gets to the slime stage.
What AHU cleaning can’t fix
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It does not solve:
- Ventilation that was badly designed in the first place
- Problems with the unit’s controls or sensors
- Ductwork downstream of the unit, which is a separate clean
Not sure which it is? You can call us on 0345 646 2711 or use the quote form and we’ll tell you honestly before you book.
What the work covers
- Supply and extract fans
- Internal panels
- Heating and cooling coils
- Drain trays
- Filter sections
- Dampers and louvres
Ventilation in Sheet's Heath buildings
Going by the FSA’s register, there are about 9 care, childcare and hospital premises serving food within roughly a mile and a half of the centre of Sheet's Heath. Busy, occupied buildings like these are where clean supply air matters most. About 27 miles out from central London, Sheet's Heath is part of the South East area we work across. Evening, overnight and weekend visits are all possible. For Sheet's Heath, the closest hospital is Brookwood Hospital, roughly 0.9 miles east. Hospitals show how much a building can rely on its ventilation, and smaller healthcare sites rely on theirs too.
Wherever a school like Brookwood Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time. Workplaces around Brookwood station with an air handling unit need the filters, coils and drain tray looked at, as well as the ducts.
Sheet's Heath is about 3 miles west of Woking, in Surrey. We carry out AHU cleaning for businesses, landlords and public buildings in Sheet's Heath and the rest of Surrey. 395 places in Surrey are on our list, large and small.
We cover every part of the GU24 postcode area for AHU cleaning and the streets around it. If you need AHU cleaning at premises on Benwell Road, Sheet's Heath Lane and The Ridgeway or a nearby road, we can help. Nearby, we also carry out AHU cleaning in Brookwood (1 mile south), Knaphill (1 mile north-east), Bisley (1 mile north), Lucas Green (2 miles north) and West End (2 miles north). Within a short drive, we also cover Guildford (5 miles south-east), Woking (3 miles east), Camberley (4 miles north-west), Farnham (10 miles south-west), Egham (9 miles north-east) and Walton-on-Thames (11 miles north-east).
What’s near Sheet's Heath
Typical jobs here are in premises near Knowl Hill School, Brookwood Lye and Nag's Head Inn. Sheet's Heath’s nearest station is Brookwood station, roughly 0.5 miles south. Well-known places in the area include The Museum of The National Rifle Association (0.8 miles west) and Brookwood Hospital (0.9 miles east). Not far away are Brookwood Lye.
What happens on the day
Everything the job needs comes with us, including protection sheets, the right tools and access kit. All we need from you is clear access and the right equipment switched off. On site, the work takes from a few hours for a compact unit to a day or more for a large one. A quick note on how to find the site and where to park makes a visit to Sheet's Heath run smoothly.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- We work through the unit from the intake to the outlet.
- We finish with the fan section and the drain tray.
- We take after pictures and issue the certificate and report.
Getting ready for the visit
- Mention any parking or loading restrictions
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Move anything stored near the system
Getting a quote
To get a fixed quote, call 0345 646 2711 or drop us a line and tell us the type of site, your opening hours and roughly what the system looks like. Photos and the last report, if you have one, make the quote quicker. We usually come back within one working day.
Advice
Places near Sheet's Heath
More services for Sheet's Heath
Your questions about AHU cleaning in Sheet's Heath
Do you work overnight in Sheet's Heath?
Yes, evening, overnight and weekend work is normal for us. The work in Sheet's Heath can fit around your hours. Let us know the hours you’re closed and we will book within them.
Do you do school ventilation cleaning in Sheet's Heath in the summer holidays?
Yes, out-of-term visits are normal for schools. The FSA’s register shows about 2 schools and colleges with food registrations within roughly a mile and a half of Sheet's Heath. Tell us your holiday dates and we will book the visit for when the site is empty.
How often should an air handling unit be cleaned?
There’s no single answer; it comes down to the building and the unit. Regular inspection shows when it’s due, and we’ll suggest an interval after the first clean.
How long will the unit be out of action?
Expect it to take one overnight shift for many single units, with bigger plant phased. The unit’s size and condition make the biggest difference, and the quote will give you a clear idea.
Is there a survey before the work?
Yes. Photos often do the job, while bigger or harder-to-see systems are surveyed on site.
Can you set up regular visits?
Yes. Regular plans can run on 3, 6 or 12-monthly cycles, to suit the system and how it’s used.
Can you look after several sites?
Yes. One number covers all your sites across London and the South East, with visits on a regular schedule.
What happens to the waste?
Waste is contained during the work and removed when we leave, from grease and debris to used cleaning water. We do not leave it behind.