West Sussex · Air handling unit cleaning
Air handling unit cleaning in Merston, West Sussex
Air handling unit cleaning for businesses, landlords and public buildings in Merston. CHAS, SafeContractor and ISO 9001, and fully insured.
- Air handling units never cleaned inside
- Drain trays holding standing water
- Plant that needs cleaning after a refit
How we handle AHU cleaning in Merston
A cooling coil drips condensate into a tray that should drain away. If the outlet blocks, standing water and slime build up, in the airstream that feeds the building. Clearing and cleaning the tray is central to every AHU clean. We’re often asked to deal with dirty coils holding back the airflow and air handling units with blocked filters, on supply and extract fans, drain trays and heating and cooling coils.
Work in a small place like Merston starts with agreeing access and timings.
Our accreditations include CHAS, SafeContractor and ISO 9001, and we’re fully insured. We’re also a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease, trading since 2009.
- Where
- Merston (PO20)
- Wider area
- West Sussex
- Paperwork
- Report and photos after the visit
- Quotes
- A fixed quote up front
- Hours
- Evenings, overnight and weekends; 24/7 emergencies
- Telephone
- 0345 646 2711
- Updated
- 30 October 2026
Looking after it afterwards
Simple habits between visits make a real difference. Our advice:
- Plan the next inspection before the last report gets filed away
- Watch for drips or damp patches near the plant
- Keep filter changes on time and recorded
- Look at the condensate drain whenever the unit is serviced
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.
Make the drain tray part of every maintenance visit. Catching a slow drain early stops standing water building up.
Honest limits
It’s worth knowing the limits before booking:
- Problems with the unit’s controls or sensors
- A system that is undersized for the building
- Breakdowns that need a mechanical engineer
Not sure which it is? You can give us a ring on 0345 646 2711, or send details by email and we will tell you honestly before you book.
Parts of the system we cover
- Filter sections
- Internal panels
- Heating and cooling coils
- Drain trays
- Supply and extract fans
- Dampers and louvres
Also near Merston
Other services in Merston
Why deal with it now?
A clean unit feeds cleaner air into the ductwork, so the ducts and grilles stay cleaner between cleans. That makes the next inspection of a building in Merston simpler. Systems in rural buildings are often out of sight and out of mind.
No two sites are the same, so each one gets its own fixed quote. Size, access, the condition of the system and when we can work all play a part.
What you get with us
- Accredited under CHAS and SafeContractor, with ISO 9001
- Fully insured
- A single point of contact for sites across the South East and London
- Evenings, overnight and weekends, plus 24/7 emergency callout
Take a look at our cost guide or how to check a contractor.
Landlords, agents and facilities managers
For anyone managing more than one site, we can schedule visits across all of them on one quote. Every building has its own written report, so each one has its own record.
Whether it’s one building or many, you get the same standard: the system surveyed, the price fixed, the visit fitted around trading and everything written up afterwards.
How the job changes from site to site
Drain trays
Older trays can corrode and start leaking. Their condition goes into the report with photos so repairs can be planned.
Rooftop and plant room units
Ceiling-mounted and compact units are cleaned too. The space underneath is protected with sheeting first.
Merston: your questions answered
Can the work in Merston be done at night or at weekends?
Yes. We work evenings, overnight and at weekends. Your customers, staff or residents in Merston needn’t be disturbed. Tell us your opening hours when you ask for a quote.
Is Merston within the area you cover?
Yes, we work in villages as well as towns, and Merston is covered. A survey first, from pictures or a visit, means we arrive with the right kit.
How much does AHU cleaning cost?
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 we start.
Will you repair the fan or motor?
The clean includes noting faults, but repairs sit with your maintenance contractor, with photos where it helps.
Do you look at the system first?
Yes, every time. We diagnose before we treat: the survey shows what needs doing and what access we need, and the quote is based on that.
Do you have a 24/7 line?
Yes, any time. For anything urgent, such as a fan failure or damage after a fire, ring the 24/7 line and we’ll talk you through the next steps.
Can one contract cover all our sites?
Yes. One number covers all your sites across London and the South East, and visits can be set on a regular cycle.
When should our AHU next be cleaned?
That’s set by inspection, in line with TR19® Air. Units in heavy use or in sensitive buildings may need attention more often.
What we do, step by step
Night work is normal for us. A lot of visits happen overnight or at weekends, so a kitchen or building can carry on as usual the next day. On site, the work takes half a day to a full day per unit, with large plant planned over several shifts. A few photos of the system help us make the most of a visit to a place like Merston.
- 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.
- Filters, coils, fan section and casing are cleaned in turn.
- Drain trays are cleared and cleaned and the outlet checked.
- You get a TR19® certificate and a photo report.
How to prepare
- Allow time for equipment near the work to be turned off and cool down
- Move anything stored near the system
- Dig out any earlier paperwork for the system
Ask for a quote
There’s no standard price list, because no two systems are the same. We look at your system first, from pictures or on a visit, then send a fixed quote. To start, give us a ring on 0345 646 2711 or email us.
Advice
In-house cleaning or a specialist?
If your staff spot something between visits, such as dripping grease, a noisy fan, a smell or a filter that will not come clean, it’s best reported rather than tackled in-house. We can diagnose it and quote.
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. Cleaning inside ducts and units is specialist work.
AHU cleaning in Merston: local notes
Going by the FSA’s register, there are about 3 schools, colleges and universities and about 4 hospitals, care homes and childcare premises serving food within 1.5 miles or so of the middle of Merston. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. About 54 miles out from central London, Merston is part of the South East area we work across. We work evenings, overnight and at weekends, so the visit fits around the site. Merston’s nearest hospital, St Richard's Hospital, is about 2.3 miles north-west. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale.
Hospitals such as St Richard's Hospital (about 2.3 miles north-west) show how much a building can rely on clean ventilation, and smaller healthcare sites near Merston are no different. For schools like North Mundham Primary School, the holidays are the usual time to inspect and clean ventilation.
Merston is about 3 miles south-east of Chichester, in West Sussex. Whatever kind of site you run in Merston, AHU cleaning is something we can help with. We can work out of hours so trading isn’t interrupted. Our West Sussex coverage runs to 371 places, and Merston is one of them. We also work in Portsmouth, around 15 miles away.
We work across PO20 for AHU cleaning and the streets around it. Neighbouring places we cover for AHU cleaning include Runcton (1 mile south-west), Colworth (1 mile east), Oving (1 mile north), North Mundham (1 mile west) and Lagness (1 mile south). Within a short drive, we also cover Worthing (15 miles east), Bognor Regis (3 miles south-east), Chichester (3 miles north-west), Selsey (6 miles south), Littlehampton (9 miles east) and Emsworth (9 miles west).
Landmarks near Merston
In Merston, that means kitchens and buildings near Chichester High School For Girls and the streets around them. The closest station to Merston is Chichester station, roughly 2.3 miles west of the centre. A little further out are The Chichester City Museum (2.3 miles north-west) and St Richard's Hospital (2.3 miles north-west).