West Sussex · Air handling unit cleaning
AHU Cleaning in Warnham
One call covers AHU cleaning in Warnham: survey, fixed quote, work and sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.
- Leaves and litter drawn into the unit
- Blocked condensate drains and slimy trays
- Air handling units never cleaned inside
AHU cleaning in Warnham, done properly
Our AHU cleaning covers sites in Warnham and the rest of West Sussex, in buildings such as offices, schools, healthcare sites and shops. Units are cleaned when the site can spare them, often evenings, overnight or weekends. The work covers drain trays, heating and cooling coils and internal panels, and the jobs we see most are units needing a clean before a new tenant or handover and odours coming through the supply air.
Rural buildings with mechanical ventilation, such as care homes and country hotels, often keep their units in roof spaces or outbuildings, where filters and drain trays get forgotten.
Nothing is signed off by word of mouth: a dated report with pictures of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. It shows what was done and what, if anything, couldn’t be reached.
- Where
- Warnham (RH12)
- Region
- West Sussex
- Reporting
- Written report with pictures
- Price
- Fixed quote, usually within a working day
- Hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
Different parts, different methods
Drain trays
Condensate from the coil drips into a tray beneath it. Standing water and slime are removed and the outlet is checked.
Heating and cooling coils
Dirt on a coil slows the air and makes it harder for the coil to heat or cool. Cleaning restores the open path through the fins.
Nearby places to Warnham
What else we do in Warnham
Multi-site and managed buildings
We regularly work with managing agents. Tell us the site, the work and the access arrangements, and we’ll send a fixed quote.
Whether it’s one building or many, the standard is the same: diagnosis, a fixed price, work booked around your hours and a written report with pictures.
How it works
We work around your opening hours, not the other way round. Most visits are booked for when the area is out of use, such as evenings, overnight, early mornings or weekends. Once we are in, the area is sheeted and anything that has to be off is turned off and cooled, and the work takes a single shift for a typical unit, longer for large or heavily soiled ones. Photos of the system and how to reach it help us plan a visit to Warnham.
- We agree a shutdown window that suits the building.
- Before cleaning, each section is photographed.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- We take after pictures and issue the certificate and report.
Before we arrive
- Let us know when the site is closed or quiet
- Dig out any earlier paperwork for the system
- Name a contact who can let us in at the agreed time
Getting a quote
Every quote begins with a look at the system, from your pictures and details or, where that isn’t enough, a survey on site. Then we send a fixed price, before work begins.
Related advice
Fixed quotes for AHU cleaning in Warnham
The price is fixed before any work begins. It’s based on:
- A single visit or a regular plan
- Where the site is and how we reach it
- Working hours and out-of-hours timing
- The condition we find in the survey
What you pay reflects the actual work. That is why every job is surveyed first, and why the quote is fixed before any work starts.
What to send for a quote
Photos let us diagnose from a distance. Try to include:
- Close-ups of filters, grilles, hatches or access panels
- The roof, plant room or outside wall the system runs to
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- When the site is open and when it’s quiet
For a fixed quote, phone us on 0345 646 2711 or drop us a line with the site type, your trading hours and a short description of the system. A few pictures and your last certificate or report help a lot. You will typically have a quote within one working day.
AHU cleaning in Warnham: local notes
Food Standards Agency records list about 4 schools, colleges and universities registered as food businesses within about 1.5 miles of central Warnham. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. Warnham is about 30 miles from central London, well within the area we cover across London and the South East. Evening, overnight and weekend visits are all possible. Horsham Hospital is the nearest hospital, about 1.8 miles south-east of Warnham. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
Horsham Hospital, about 1.8 miles south-east, is the nearest hospital to Warnham, and healthcare sites of every size need their supply air kept clean.
Warnham is about 2 miles north-west of Horsham, in West Sussex. We carry out AHU cleaning for commercial premises of every kind in Warnham and the rest of West Sussex. Our area takes in 371 places across West Sussex, large and small. You can also see our page for Guildford, roughly 15 miles from Warnham.
AHU cleaning in RH12 is surveyed, quoted and booked the same way as anywhere else. You will find streets such as Hollands Way, Stanford Orchard and Gardeners Close, all of which we cover for AHU cleaning. Neighbouring places we cover for AHU cleaning include Broadbridge Heath (2 miles south), Holbrook (2 miles east), Horsham (2 miles south-east), Rowhook (2 miles west) and Tower Hill (2 miles south). We also work in nearby towns such as Crawley (7 miles east), Haywards Heath (13 miles south-east), Burgess Hill (13 miles south-east), East Grinstead (15 miles east), Broadfield (6 miles east) and Storrington (12 miles south).
What’s near Warnham
In Warnham, that means kitchens and buildings near Warnham Park, The Greets Inn and Greenway Academy, among other places. The closest station to Warnham is Warnham station, about 1 mile east of the centre. Nearby you’ll also find Horsham Hospital (1.8 miles south-east) and Christs Hospital School Museum (3.2 miles south). For a walk, there’s Warnham LNR and Vann Lake.
Questions from Warnham
Can ventilation in schools around Warnham be cleaned out of term?
Yes, holiday work suits schools best. Food Standards Agency records list about 4 schools, colleges and universities with registered kitchens within about a mile and a half of Warnham. Tell us your holiday dates and we will book the visit for when the site is empty.
Can the work in Warnham be done at night or at weekends?
Yes, nights and weekends are routine for us. That way a site in Warnham does not have to lose a day’s trading. Let us know the hours you’re closed and we will book within them.
Do you repair air handling units?
Motors, belts, controls and coils that need repair are a job for your maintenance contractor. We clean the unit and report anything we see that needs attention.
Can you quote from photos?
Often, yes. With good photos, the site type and your last report, we can price many jobs. Larger or hidden systems need a survey on site first.
How do you protect the area?
Floors and surfaces near the work are sheeted before we start, and anything we remove is contained. At the end, the area is cleaned down.
Is there a report after cleaning?
Yes, both a certificate and a report with photos. It includes a recommended date for the next check.
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.
How much does AHU cleaning cost?
There’s no set price, as it depends on the job: the size of the system, its condition, access and when we can work. You get a fixed price before any work starts.
Honest limits
It’s worth knowing the limits before booking:
- Breakdowns that need a mechanical engineer
- Building management system faults
- A system that is undersized for the building
Not sure which it is? You can ring 0345 646 2711 or send us an email and we will tell you honestly.
Where we work
- Supply and extract fans
- Dampers and louvres
- Internal panels
- Heating and cooling coils
- Filter sections
- Drain trays
Looking after it afterwards
Here’s the after-treatment advice, in brief:
- Keep the certificate and photo report with the plant records
- Flag stale or damp smells in the supply air
- Book the next check in line with the report
- Report stiff or damaged access doors
We recommend when the unit should next be inspected or cleaned, taking into account how dirty it was. TR19® Air is risk-based, so the interval depends on the unit and how the building is used.
Check drain trays and condensate drains during routine maintenance. A drain that is cleared early never gets to the slime stage.
What we are called out for in Warnham
Mechanical servicing keeps a unit running, but it does not always include cleaning the inside. So a unit can be well maintained and still dirty.
If you notice any of these, it’s worth a diagnosis:
- Stale or musty smells from the ventilation
- Filters that are clogged or overdue
- Condensate trays that won’t empty
- Leaves and litter drawn into the unit
For schools like Warnham CofE Primary School, the holidays are the usual time to inspect and clean ventilation.
What to look for in a quote
- What records you’ll receive afterwards
- How they set the interval to the next visit
- If they look at the system before pricing
- Whether the whole system is included, or only the parts that are easy to reach