West Sussex · Air handling unit cleaning
North Mundham AHU cleaning
Air handling unit cleaning for commercial sites in North Mundham and across West Sussex. CHAS, SafeContractor and ISO 9001, and fully insured.
- Air handling units never cleaned inside
- Condensate trays that won’t empty
- Units needing a clean before a new tenant or handover
AHU cleaning in North Mundham: local notes
There are about 6 schools, colleges and universities and about 18 care, childcare and hospital premises on the FSA’s food hygiene register in and around North Mundham, up to about a mile and a half out. Classrooms, bedrooms and care spaces are often served by ducted air, and that ductwork collects dust over time. For North Mundham, the closest hospital is St Richard's Hospital, roughly 2.1 miles north. If you run a surgery, clinic or care home, your ventilation deserves the same care as a hospital’s, on a smaller scale. North Mundham, about 55 miles from central London, is within our usual area. The visit is fixed around your opening hours, not ours.
School buildings such as North Mundham Primary School are typically done in the holidays, so classrooms are not disturbed.
North Mundham is about 2 miles south-east of Chichester, in West Sussex. Wherever you are in the PO20 postcode area, we cover AHU cleaning for commercial sites. North Mundham is one of 371 towns, villages and districts in West Sussex where we work for AHU cleaning. You can also see our page for Portsmouth, about 14 miles away.
Work in PO20 follows the same survey, fixed quote and written report as everywhere else we cover. You’ll find streets such as Church Road, Fletcher Place and Palmer Place, and we cover them all for AHU cleaning. We also cover the places around North Mundham: Runcton (1 mile east), Hunston (1 mile west), Merston (1 mile east), Donnington (1 mile west) and Lagness (2 miles south-east). Within a short drive, we also cover Bognor Regis (4 miles south-east), Selsey (6 miles south), Littlehampton (10 miles east), Emsworth (8 miles west), Rustington (11 miles east) and Storrington (15 miles north-east).
Landmarks near North Mundham
Locally, jobs take us to businesses close to The Spotted Cow Public House and Chichester High School For Girls, among other places. North Mundham’s nearest station is Chichester station, roughly 1.6 miles north-west. Other landmarks nearby include St Richard's Hospital (2.1 miles north) and Chichester Cathedral Treasury (1.8 miles north-west).
AHU cleaning in North Mundham, done properly
Every supply and extract system relies on the air handling unit at its centre: air is pulled in, filtered, conditioned and sent out through the ducts. 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. The work covers supply and extract fans, internal panels and dampers and louvres, and common reasons people get in touch are plant that needs cleaning after a refit and stale or musty smells from the ventilation.
In a village or hamlet like North Mundham, few buildings have mechanical ventilation, but those that do need it inspected and cleaned like any other.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. Any parts we couldn’t reach are recorded on it too.
- Location
- North Mundham (PO20)
- Region
- West Sussex
- Reporting
- Report and photos after the visit
- Quotes
- A fixed price before any work starts
- When we work
- Out of hours as standard, 24/7 emergency line
- Phone
- 0345 646 2711
- Page updated
- 30 October 2026
How the job changes from site to site
Filters
Filter condition tells you a lot about the rest of the unit. They’re photographed before and after for your records.
Drain trays
Drain trays can rust and leak over time. Their condition goes into the report with pictures so you can decide on any repairs.
What happens if it’s left?
A light clean now is simpler than a heavy one later. Years of build-up make the job longer and harder, particularly where damp has made it stick. In a small place like North Mundham, a system that fails can take a site out of use.
The price reflects the work, not guesswork. That is why we survey first, from photos or on site, and why the quote is fixed before any work starts.
Why North Mundham businesses choose us
- Fully insured
- Photo reports with every job
- We diagnose before we treat
- In business since 2009
Read how cleaning jobs are priced and how to check a contractor.
For landlords and multi-site operators
Records are where multi-site compliance often slips. Every visit ends with a dated report and photos, so you can show an insurer or inspector what was done at each site.
We also work for facilities teams across offices, schools and healthcare across West Sussex. Larger estates can be phased building by building to keep disruption down.
Nearby places to North Mundham
Also in North Mundham
How we price AHU cleaning
The survey tells us what the work involves. We look at:
- Whether we need access equipment or extra panels
- Working hours and out-of-hours timing
- Whether several sites go on one quote
- The condition we find in the survey
You won’t find a price list here, because each job is priced on what it involves. Call for a fixed quote, and we’ll explain what it covers.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in touch, it helps to send:
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Anything you’ve noticed, such as smells, noise, drips or poor airflow
- Any access panels or hatches you can see
- When the site is open and when it’s quiet
For AHU cleaning in North Mundham, call 0345 646 2711 or drop us a line. Let us know the site type and the opening hours, and send photos or your last report if you can. We typically send a fixed quote within one working day.
What we do, step by step
On the day, we arrive at the time agreed with you, often in the evening, overnight or at the weekend so the site keeps working. Anything that needs to be off for the work is switched off and left to cool before work begins, and the area around the work is covered and protected. On site, it takes from a few hours for a compact unit to a day or more for a large one. Somewhere as small as North Mundham, the date and timings are agreed with you well before the day.
- We agree a shutdown window that suits the building.
- We take before photos of each section of the unit.
- We work through the unit from the intake to the outlet.
- The fan and drain tray are cleaned and the drain checked.
- After pictures are taken and the certificate issued.
How to prepare
- Mention any sign-in, permit or induction we need
- Make sure someone can let us in and lock up afterwards
- Dig out any earlier paperwork for the system
Ask for a quote
To help us quote: where the site is, what it is and its opening hours, a few pictures and the last certificate or report, if there is one. Then call 0345 646 2711 or use the quote form.
Read more
Keeping the system healthy
Here’s the after-treatment advice, in brief:
- Watch for drips or damp patches near the plant
- Stick to the filter change plan
- Keep inspection doors on the unit in good order
- Flag stale or damp smells in the supply air
When we have closed the unit up, it can be restarted with your site team. Keep an eye on the condensate drain over the next few days to confirm water is draining away.
Regular inspection under TR19® Air shows when cleaning is due instead of leaving it to guesswork.
Your questions about AHU cleaning in North Mundham
Can the work in North Mundham be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. The work in North Mundham can fit around your hours. Just ring 0345 646 2711, or send details by email with your opening times and we’ll plan around them.
Do you do school ventilation cleaning in North Mundham in the summer holidays?
Yes, holiday work suits schools best. There are about 6 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of North Mundham. Tell us your holiday dates and we’ll book the visit for when the site is empty.
What do you do to protect the area?
By covering it before any work starts. We keep the work contained and leave the area clean.
What’s included in an AHU clean?
The main parts are the filters, coils, drain tray, fan and inside of the casing. The survey confirms what’s in your unit before we quote.
Can you quote from pictures?
In many cases, yes. Photos of the system and the access, plus your opening hours and last report, are often enough. Larger or hidden systems need a survey on site first.
Will we get paperwork for the AHU clean?
Yes. You receive a certificate and a report showing each section before and after, including anything we think needs attention.
How long does it take to clean an air handling unit?
As a guide, it takes a single shift for a typical unit, longer for large or heavily soiled ones. We plan the shutdown around that, out of hours if needed.
Do you survey before quoting?
Yes, every time. Diagnosis comes before treatment: the survey tells us what the system needs and how to reach it and the fixed quote is built on it.
Signs you need AHU cleaning in North 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.
Clients typically contact us after spotting something like this:
- Air handling units never cleaned inside
- Intake sections clogged with outdoor debris
- Blocked condensate drains and slimy trays
- Air handling units with blocked filters
If you run a surgery, dental practice or care home near North Mundham, clean ventilation matters as much to you as to a hospital like St Richard's Hospital (about 2.1 miles north).
What to look for in a quote
- Whether a survey comes first
- Whether a written report and photos are included
- Whether the whole system is included, or only the parts that are easy to reach
- How areas they can’t reach will be recorded