Surrey · Air handling unit cleaning
Air handling unit cleaning in Merstham, Surrey
Air handling unit cleaning for Merstham, with a survey first and a report with photos at the end. Call for a fixed quote.
- Odours coming through the supply air
- Debris and leaves in the fresh air intake
- Dust-coated heating and cooling coils
For landlords and multi-site operators
Multi-site operators often want one contractor and one number. We work across London and the South East, so visits at different addresses can be planned together and kept on a regular cycle.
Facilities teams in offices, schools and healthcare sites book us too in Merstham and across Surrey. Larger estates can be phased building by building to keep disruption down.
About our AHU cleaning in Merstham
Every supply and extract system relies on the air handling unit at its centre: it draws air in, filters it, heats or cools it and pushes it round the ductwork. Anything that collects inside the unit can end up in the rooms it serves, which is why we clean the unit itself, not just the ducts. Typical jobs include intake sections clogged with outdoor debris and odours coming through the supply air, across dampers and louvres, drain trays and filter sections.
For a building in or near Merstham, access is agreed in advance and the visit is planned around the journey.
For insurers and inspectors, the record counts. That’s why every job is written up in a report with photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.
- Where
- Merstham (RH1)
- Wider area
- Surrey
- Paperwork
- Report and photos after the visit
- Quotes
- Fixed quote, normally within a working day
- Working hours
- Out of hours as standard, 24/7 emergency line
- Call
- 0345 646 2711
- Checked
- 30 October 2026
What affects the quote in Merstham
We quote each job individually. This is what makes a difference:
- The times the site is available
- Site requirements such as sign-in and permits
- Where the site is and how we reach it
- Whether we need access equipment or extra panels
You won’t find a price list here, because the cost depends on the site in front of us. Call for a fixed quote, and we will explain what it covers.
Helping us quote
Before you ask for a quote, gather:
- How we’d reach plant on a roof or in a plant room
- The times we could work without disrupting the site
- Detail shots of panels, filters and grilles
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
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, you get a fixed price before work begins.
When it’s something else
A few issues sit outside what this work can do:
- Problems with the unit’s controls or sensors
- Dirty ducts beyond the unit itself
- Damaged coils beyond cleaning
Not sure which it is? You can ring 0345 646 2711 or drop us a line and we will tell you honestly before you book.
Where we work
- Filter sections
- Supply and extract fans
- Heating and cooling coils
- Dampers and louvres
- Drain trays
- Internal panels
What your team can do, and what needs us
Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease need training, the right equipment and safe access. Leave those to 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’ll take a look and send you a fixed quote.
Places near Merstham
More services for Merstham
Leave it or put it right?
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 planned clean is far less disruptive than a breakdown. Our emergency line runs 24/7, but a planned visit to Merstham is calmer for everyone.
Kitchens, offices, schools and hospitals are all priced the same way: how much there is, how we reach it, what state it’s in and when we can work. Call for a fixed quote and we’ll explain each part.
Why Merstham businesses choose us
- Work around your opening hours, with 24/7 emergency cover
- Ventilation hygiene specialists since 2009
- Accredited under CHAS and SafeContractor, with ISO 9001
- Photo reports with every job
Merstham buildings and their air
Going by the FSA’s register, there are about 4 schools, colleges and universities and about 6 hospitals, care homes and childcare premises serving food within roughly a mile and a half of the centre of Merstham. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. About 16 miles out from central London, Merstham is part of the South East area we work across. We work evenings, overnight and at weekends, so the visit fits around the site. St Lawrence's Hospital is the nearest hospital, about 2.3 miles north-east of Merstham. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
Classrooms and halls at schools such as Merstham Primary School are easiest to work in when pupils are away. Hospitals such as St Lawrence's Hospital (about 2.3 miles north-east) show how much a building can rely on clean ventilation, and smaller healthcare sites near Merstham are no different.
Merstham is about 2 miles north of Redhill, in Surrey. Every kind of commercial site in Merstham, AHU cleaning is something we can help with. We can work out of hours so trading is not interrupted. Merstham is one of 395 towns, villages and districts in Surrey where we work for commercial clients. For sites nearby, see our London page (16 miles or so).
All of RH1 is within our area for AHU cleaning, from busy streets to back roads. If you need AHU cleaning at premises on London Road North, Shepherd's Hill and Church Hill or anywhere close by, we can help. We also cover South Merstham (1 mile south), Gatton (1 mile south-west), Holmethorpe (1 mile south), Hooley (2 miles north) and Netherne on-the-Hill (2 miles north). We also work in nearby towns such as Epsom (7 miles north-west), Horley (6 miles south), Ewell (7 miles north-west), Reigate (3 miles south-west), Walton-on-Thames (14 miles north-west) and Caterham (3 miles north-east).
What’s near Merstham
We work in commercial kitchens and buildings around Merstham Park School, Nutfield Marshes and East Surrey College. The nearest railway station is Merstham station, about 0.5 miles south. Nearby you will also find Surrey Fire Museum (2.8 miles south-west) and Bletchingley Castle (2.8 miles south-east). Not far away are South London Downs National Nature Reserve and Colley Hill.
Common problems we fix in Merstham
Whatever surrounds a building in Merstham, the air drawn into its AHU carries dust, pollen and debris. Most of it lands at the intake and the first stage of filters, and some travels further into the unit.
If you notice any of these, it’s worth a diagnosis:
- Dust-coated heating and cooling coils
- Fan sections that haven’t been cleaned in years
- Air handling units with blocked filters
- Leaves and litter drawn into the unit
If you manage offices or shops near Merstham station, their ventilation can be inspected and cleaned out of hours.
Questions to ask before you book
- Whether VAT is included
- What’s included in the scope, part by part
- How they set the interval to the next visit
- Whether inaccessible sections are listed on the report
Questions from Merstham
Can you work in Merstham outside opening hours?
Yes, evening, overnight and weekend work is normal for us. The work in Merstham can fit around your hours. Your opening times are the first thing we ask for.
Do you do school ventilation cleaning in Merstham in the summer holidays?
Yes. The holidays are the usual time for school work. Around Merstham, the Food Standards Agency lists about 4 schools and colleges with registered kitchens within a mile and a half or so. Send us your term dates when you call 0345 646 2711, or email photos, and we will fit the work in.
Which sectors do you work in?
Commercial premises of every kind: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. Work is timed around how each site runs.
How much does AHU cleaning cost in Merstham?
There’s no set price, as it depends on the job: how big it is, what state it’s in, how we reach it and the working hours. You get a fixed price before any work starts.
Can one contract cover all our sites?
Yes. Tell us the addresses and what each needs and we’ll quote them together.
Do you do ventilation duct cleaning too?
Yes. We reach the ducts through access panels, with anything inaccessible recorded, with new panels fitted where needed.
Can you price the work without visiting?
Yes, where the photos show enough. If not, a site survey comes first, and the quote follows that.
Will the ventilation be off while you clean?
Yes, while the clean is under way. Out-of-hours work is available to keep disruption down.
The process
We are used to working while the site is closed. A lot of visits happen overnight or at weekends, so a kitchen or building can carry on as usual the next day. The visit itself takes half a day to a full day per unit, with large plant planned over several shifts. A quick note on how to find the site and where to park makes a visit to Merstham run smoothly.
- We survey the unit from pictures or on site and agree what’s included.
- The unit is shut down with your site team and the area protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Standing water and slime come out of the tray and the drain is checked.
- You get a TR19® certificate and a photo report.
Before we arrive
- Allow time for equipment near the work to be turned off and cool down
- Agree a time when the area can be out of use
- Let us know about parking and loading
Ask for a quote
Quotes are quick. Call or email with a few details and you will normally have a fixed price within one working day. If we need to see the system first, we book a survey around your hours.