West Sussex · Air handling unit cleaning
South Mundham AHU cleaning
Cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces for commercial sites in South Mundham and across West Sussex. BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease.
- Dirty coils holding back the airflow
- Units needing a clean before a new tenant or handover
- Blocked condensate drains and slimy trays
What happens on the day
We start by comparing what we find with the survey or your photos. Anything unexpected is raised with you before we go further. After that, the work takes half a day to a full day per unit, with large plant planned over several shifts. If you can send photos, we can arrive in South Mundham knowing what to expect.
- First we agree when the unit can be switched off, including evenings or weekends.
- 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.
- After pictures are taken and the certificate issued.
How to prepare
- Plan for cooking equipment or plant to be off before we arrive
- Find the previous report, if there is one
- Mention any locked doors, roof access or ceiling voids
How to get a quote
Quoting starts with a diagnosis, either from photos and details you send or from a site visit. Then we send a fixed price so you know the cost before work begins.
Advice
AHU cleaning for kitchens and businesses in South Mundham
A cooling coil drips condensate into a tray that should drain away. When the drain blocks, water sits there and the tray turns slimy, in the airstream that feeds the building. Cleaning and clearing it is a key part of the job. The work covers heating and cooling coils, filter sections and dampers and louvres, and the jobs we see most are odours coming through the supply air and dirty filters cutting the airflow.
Work in a small place like South Mundham starts with agreeing access and timings, and the ventilation is inspected, cleaned and recorded the same as anywhere.
We have been trading since 2009, and we’re a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we carry full insurance.
- Place
- South Mundham (PO20)
- Wider area
- West Sussex
- Paperwork
- Written report with pictures
- Quote
- A fixed quote up front
- When we work
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Checked
- 30 October 2026
Honest limits
Some problems need a different service or another trade:
- Leaking heating or cooling coils
- Ductwork downstream of the unit, which is a separate clean
- A system that’s undersized for the building
If you’re not sure, just phone us on 0345 646 2711 or use the quote form and we’ll give you a straight answer.
What the work covers
- Heating and cooling coils
- Internal panels
- Dampers and louvres
- Supply and extract fans
- Drain trays
- Filter sections
South Mundham questions
Do you work overnight in South Mundham?
Yes, we can come after you close and finish before you open. It means the site in South Mundham keeps running as normal. Tell us your opening hours when you ask for a quote.
Do you offer AHU cleaning in South Mundham?
Yes, South Mundham is within the area we cover across London and the South East. A fixed quote typically follows within one working day of the survey details.
Do you have a 24/7 line?
Yes, 24/7. Our office is open from 8am to 6pm on weekdays, with the emergency line covering every other hour.
Which accreditations do you hold?
BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease, plus CHAS, SafeContractor and ISO 9001. We are fully insured and have been trading since 2009.
Where does the waste go?
It’s contained and taken away. Grease, debris and waste water are collected as the work goes on rather than letting it spread.
What is TR19?
TR19® is BESA’s specification for ventilation hygiene. TR19® Grease, a standalone specification since 2019, covers grease in kitchen extract systems, and TR19® Air covers general supply and extract systems.
Do you look at the system first?
Yes, always. We diagnose before we treat: the survey shows what needs doing and what access we need and the fixed quote is built on it.
Can you clean the ducts connected to the AHU?
Yes, the ductwork, grilles and diffusers the unit serves. The survey shows whether the ducts need cleaning now.
Common problems we fix in South Mundham
Mechanical servicing keeps a unit running, but it doesn’t always include cleaning the inside. That means a unit can tick every service box and still be carrying years of dirt.
What we’re most often called out for:
- Debris and leaves in the fresh air intake
- Plant that needs cleaning after a refit
- Stale or musty smells from the ventilation
- Dirty fans and fan housings
If you run a surgery, dental practice or care home near South Mundham, clean ventilation matters as much to you as to a hospital like St Richard's Hospital (about 3.1 miles north).
Questions to ask before booking
- Proof of accreditation you can verify
- Whether the whole system is included, or only the parts that are easy to reach
- What records you’ll receive afterwards
- When they can work, and whether that is outside your opening hours
Different parts, different methods
Rooftop and plant room units
Smaller units in ceiling voids are part of the work as well. We protect the area below before opening them.
Drain trays
Standing water in a tray sits right where the air passes. We clean it and report anything about the tray or drain that needs fixing.
What your team can do, and what needs us
If your staff spot something 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 send you a fixed quote.
Staff cleaning and specialist work are not the same thing. Wiping filters daily and washing them weekly keeps the visible parts in order, but grease that has passed the filters is out of reach. That part needs specialist access and equipment.
For landlords and multi-site operators
We work for landlords, managing agents and facilities managers as well as the people running the site. Where a system serves more than one tenant, such as a shared riser, it helps to agree who arranges the work, and we are happy to quote for all of it.
For anyone managing more than one site, we can plan visits across the whole estate and price them together. Every building has its own written report, so each one has its own record.
Places near South Mundham
What else we do in South Mundham
Why it’s worth doing now in South Mundham
Standing water in a drain tray does not clear itself. Leave it and you risk overflows, leaks into the space below and odours carried round the building. Clearing it now is a much smaller job. Out of sight is the usual reason a rural system goes too long without attention.
What you pay depends on the size of the system, what state it’s in and access to every part of it. You get a fixed price before any work starts, so you know where you stand.
Why us?
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
- One number for every site across the South East and London
- Work around your opening hours, with 24/7 emergency cover
- Photo reports with every job
AHU cleaning in South Mundham: local notes
South Mundham, about 56 miles from central London, is within our usual area. Evening, overnight and weekend visits are all possible. About 3.1 miles north of South Mundham is St Richard's Hospital, the nearest hospital. Healthcare buildings depend on clean supply and extract ventilation, and the same applies to surgeries, clinics and care homes.
If you manage a school such as North Mundham Primary School, ventilation cleaning is best booked for the holidays.
South Mundham is about 3 miles south of Chichester, in West Sussex. Anywhere in PO20, we can carry out AHU cleaning at your premises. South Mundham is one of 371 places in West Sussex where we work for commercial clients. We also work in Portsmouth, about 14 miles from South Mundham.
We work across the PO20 postcode area for AHU cleaning and the roads nearby. Whether your site is on Manor Lane and Honer Lane or a nearby road, our technicians can take on the work. We also cover the places around South Mundham: Fisher (1 mile west), Street End (2 miles south-west), Sidlesham Common (2 miles west), Nyetimber (2 miles south-east) and Sidlesham (2 miles south-west). Within a short drive, we also cover Bognor Regis (3 miles east), Chichester (3 miles north), Selsey (5 miles south), Littlehampton (10 miles east), Emsworth (9 miles north-west) and Rustington (11 miles east).
Local landmarks in South Mundham
Around South Mundham, our work takes us to kitchens and buildings near Chichester High School For Girls and Avisford, among other places. For rail, the closest station is Chichester station, roughly 2.5 miles north-west. Nearby you’ll also find Chichester Castle (3 miles north) and Chichester Cathedral Treasury (2.7 miles north-west).