Surrey · Air handling unit cleaning
Merrow AHU cleaning
Professional AHU cleaning in and around Merrow, timed so the site keeps working and finished with a written report and photos.
- Air handling units due a clean after building work
- Stale or musty smells from the ventilation
- Leaves and litter drawn into the unit
What a clean won’t put right
Not every problem is solved by AHU cleaning, and we’d rather say so up front. It won’t put right:
- The supply and extract ducts, quoted separately
- Ventilation that was badly designed in the first place
- Faulty motors, drives or bearings
If you are not sure, just ring 0345 646 2711 or send us an email and we’ll give you a straight answer before you book.
What the work covers
- Dampers and louvres
- Filter sections
- Drain trays
- Internal panels
- Supply and extract fans
- Heating and cooling coils
AHU cleaning in Merrow, done properly
No two plant rooms are the same, whether it’s a compact unit in a ceiling void or a big unit on the roof. We look at the unit first, from photos or a site visit, and send you a fixed quote, so you know where you stand. The work covers supply and extract fans, heating and cooling coils and internal panels, and the jobs we see most are rooms that smell stuffy when the system runs and drain trays holding standing water.
For a building near Merrow, the visit is planned around how it’s used, and the journey is planned ahead. The work is the same as in any town: inspect, clean, record.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with pictures, plus a TR19® certificate through the BESCA VHE portal where the work is a TR19® Grease clean.
- Location
- Merrow (GU1, GU4)
- Region
- Surrey
- Paperwork
- Report and photos after the visit
- Price
- Fixed quote, normally within a working day
- Working hours
- When your site is closed, plus a 24/7 line
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
What happens on the day
There are three stages on the day: getting the area ready, doing the work and signing it off. Set-up means sheeting and making equipment safe, while signing off means the written report and photos. The middle part takes longest, and that takes half a day to a full day per unit, with large plant planned over several shifts. Because the survey comes first, a visit to Merrow can typically be finished without a second trip.
- We agree a shutdown window that suits the building.
- We take before pictures of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- We finish with the fan section and the drain tray.
- After photos are taken and the certificate issued.
Getting ready for the visit
- Let us know about parking and loading
- Let us know about permits to work or site inductions
- Dig out any earlier paperwork for the system
Get a fixed quote
Some systems can be priced from photos; others need a survey. 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.
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How the job changes from site to site
Internal casing and panels
The inside walls and floor of the casing collect dust and debris. Each section is cleaned from the intake through to the outlet.
Heating and cooling coils
Cooling coils stay damp in use, so dirt on them can turn sticky. The coil and its drain tray are cleaned as one job.
Common questions in Merrow
Can you come to Merrow after we close?
Yes, out-of-hours work is a big part of what we do. The work in Merrow can fit around your hours. Your opening times are the first thing we ask for.
Can you clean school ventilation in Merrow during the holidays?
Yes, and it’s the easiest time to do it. The FSA’s register shows about 12 schools and colleges with food registrations within roughly a mile and a half of Merrow. You can call 0345 646 2711 or send us an email with the dates the site is empty.
What is TR19?
It’s BESA’s specification and the benchmark insurers, fire officers and EHOs look to. It sets out inspection, cleaning and record keeping, and it takes a risk-based approach.
Which sectors do you work in?
We work for restaurants, pubs, hotels, schools, colleges, hospitals, care homes, offices and shops, plus food production and leisure sites.
How long does it take to clean an air handling unit?
Cleaning takes half a day to a full day per unit, with large plant planned over several shifts. Large plant can be split over several shifts, so ring 0345 646 2711 or drop us a line to talk it through.
What should I send you?
A short description and a few photos plus the address and your hours. We’ll ask for anything else we need.
Can you set up regular visits?
Yes, of course. Send details of the systems and how they’re used and we will propose a schedule with a fixed quote.
How do you keep the site clean during the work?
We start with protection: floor sheeting and covers over nearby surfaces and equipment. We tidy up and take our waste away before we leave.
For landlords and multi-site operators
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.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Each site gets its own report and photos, so each one has its own record.
What staff can safely do
Logging matters as much as cleaning. A simple log of filter washes, wipe-downs and checks helps show that the system is managed between specialist 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. What they cannot safely do is clean inside the ductwork, the fan or the risers, and that’s where we come in.
Places near Merrow
What else we do in Merrow
Why deal with it now?
Standing water in a drain tray does not clear itself. Left alone, it can overflow, leak into the plant area or ceiling below and spread smells through the system. Clearing it now is a much smaller job. It’s better to plan the work at a site near Merrow than wait for a failure.
Working hours, access and the scale of the site all affect the cost. We take each of them into account, and the price is fixed before work begins.
Why book with us
- BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- In business since 2009
- Accredited under CHAS and SafeContractor, with ISO 9001
- Full insurance on every job
Take a look at our cost guide and how to check a contractor.
How we price AHU cleaning
Your quote is based on your site. We take into account:
- The times the site is available
- How big the system is
- Whether we need access equipment or extra panels
- What state the system is in
You will not find a price list here, because the cost depends on the site in front of us. Call for a fixed quote, and we’ll talk you through it.
What we need to know
We can often survey from pictures. Try to include:
- The paperwork from the last visit, if you have it
- Wide photos of the system and the area around it
- Close-ups of filters, grilles, hatches or access panels
- When the site is open and when it’s quiet
If you need AHU cleaning in Merrow, give us a ring on 0345 646 2711 or email us. Tell us what kind of premises it is and when it’s open, and send photos or your last report if you can. We typically send a fixed quote within one working day.
Ventilation in Merrow buildings
Food Standards Agency data includes about 12 schools, colleges and universities and about 12 caring premises (care homes, nurseries and hospitals) in and around Merrow, up to about a mile and a half out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. Merrow is about 26 miles from central London, well within the area we cover across London and the South East. Evening, overnight and weekend visits are all possible. About 1.5 miles south-west of Merrow is St. Luke’s Hospital, the nearest hospital. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
School buildings such as Bushy Hill Junior School are usually done in the holidays, so classrooms aren’t disturbed. Healthcare buildings such as St. Luke’s Hospital, about 1.5 miles south-west, depend on their ventilation; if you manage a surgery, clinic or care home near Merrow, yours matters too.
Merrow is about 2 miles east of Guildford, in Surrey. From the centre of Merrow to the outskirts, AHU cleaning is available to all kinds of commercial premises, from a single unit to a large public building. Merrow is one of 395 towns, villages and districts in Surrey where we work for commercial clients.
Postcode districts we cover here for AHU cleaning: GU1 and GU4. Whether your site is on Park Lane, Grove Road and Wykeham Road or anywhere close by, we can help. Neighbouring places we cover for AHU cleaning include Burpham (1 mile north-west), Abbotswood (1 mile west), West Clandon (2 miles north-east), Guildford (2 miles west) and Chilworth (2 miles south). Within a short drive, we also cover Woking (5 miles north), Camberley (11 miles north-west), Epsom (13 miles north-east), Farnham (12 miles west), Ewell (14 miles north-east) and Egham (13 miles north).
Near you in Merrow
In Merrow, that means kitchens and buildings near St Peter's Catholic School, St Peter's Catholic School and Riverside Park and the streets around them. For rail, the closest station is Clandon station, about 1.6 miles north-east. Nearby you will also find Guildford Castle (2.1 miles south-west) and Surrey Infantry Museum (0.6 miles north-east). Not far away are St Martha's Hill and Colyer's Hanger and Silent Pool.