Southampton · Air handling unit cleaning
AHU Cleaning in St Mary's
Looking for AHU cleaning in St Mary's? We diagnose first, fix the price and book the work around your hours, finishing with a written report and pictures.
- Blocked condensate drains and slimy trays
- Coils clogged with dust and debris
- Air handling units never cleaned inside
Between visits
To keep the system working properly between visits:
- Stick to the filter change plan
- Keep the area around the fresh air intake clear
- Store the TR19 paperwork where auditors can find it
- Flag stale or damp smells in the supply air
Stick to the filter change schedule, because good filters protect everything downstream. Log every change so it’s easy to see when the next is due.
Keep the unit’s doors and panels in working order. If a section is hard to get into, it tends not to get checked.
AHU cleaning in St Mary's, done properly
Heating and cooling coils trap dust that gets past the filters. A coated coil restricts airflow and makes the unit work harder. We clean coils with methods suited to their condition, taking care not to damage the fins. The work covers filter sections, dampers and louvres and drain trays, and the jobs we see most are intake sections clogged with outdoor debris and coils clogged with dust and debris.
For a building near St Mary's, the visit is planned around how it’s used, and the journey is planned ahead. The work is the same as in any town: inspect, clean, record.
Nothing is signed off by word of mouth: a written report, dated and illustrated with photos, plus a certificate through the BESCA Vent Hygiene Elite portal when the work is a TR19® Grease clean. Any parts we couldn’t reach are recorded on it too.
- Where
- St Mary's (SO14, SO15, SO18)
- Wider area
- Southampton
- Reporting
- Photo report after every visit
- Price
- Fixed quote, typically within a working day
- Hours
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Updated
- 30 October 2026
What we are called out for in St Mary's
An overdue filter loads up with dirt, cutting airflow and sometimes letting dirty air bypass them altogether. After that, the coils and fan collect what the filter should have caught.
Keep an eye out for these warning signs:
- Condensate trays that will not empty
- Dust-coated heating and cooling coils
- Air handling units never cleaned inside
- Odours coming through the supply air
If you manage offices or shops near Southampton Central station, their ventilation can be inspected and cleaned out of hours.
What your quote should include
- Their accreditations, such as BESCA Vent Hygiene Elite, CHAS or SafeContractor
- Whether the quote is based on a survey or pictures
- Whether a written report and pictures are included
- Whether the quote shows VAT
What affects the quote in St Mary's
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether it’s a one-off visit or part of a schedule
- How easy every part is to reach
- Where the site is and how we reach it
- How big the system is
Combining work into one visit or one programme often makes better use of the time. Mention every system or site you need covered and we’ll price it together.
What we need to know
A few details help us quote accurately. When you get in touch, it helps to send:
- Your last certificate, test record or report
- Where the plant sits or the system leaves the building, such as a roof or outside wall
- Where the site is and what kind of site it is
- Detail shots of panels, filters and grilles
For a fixed quote, give us a ring on 0345 646 2711 or send us an email and tell us the type of site, your opening hours and roughly what the system looks like. A few photos and your last certificate or report help a lot. We normally come back within one working day.
AHU cleaning around St Mary's
There are about 32 schools, colleges and universities, about 51 care, childcare and hospital premises and about 25 hotels and B&Bs on the FSA’s food hygiene register within 1.5 miles or so of the middle of St Mary's. Buildings like these often rely on mechanical ventilation, which TR19® Air covers. The nearest hospital to St Mary's is Royal South Hants Hospital, about 0.5 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.
Healthcare buildings such as Royal South Hants Hospital, about 0.5 miles north, depend on their ventilation; if you manage a surgery, clinic or care home near St Mary's, yours matters too. Classrooms and halls at schools such as Hope Community School Southampton are easiest to work in when pupils are away.
St Mary's is about 1 mile south of Southampton, in Southampton. We carry out AHU cleaning for businesses, landlords and public buildings in St Mary's and the rest of Southampton. St Mary's is one of 40 places in Southampton we cover for commercial clients.
Every address in SO14, SO15 and SO18 is within our area for AHU cleaning, from the main roads to the quietest streets. If you need AHU cleaning at premises on New Road, Ogle Road and Marsh Lane or a nearby road, our technicians can take on the work. Neighbouring places we cover for AHU cleaning include Northam (1 mile north-east), Inner Avenue (1 mile north), Peartree Green (1 mile east), Southampton (1 mile north) and Bitterne Manor (1 mile north-east). Larger places within reach include Chartwell Green (3 miles north-east), Harefield (3 miles east), Maybush (3 miles north-west), Coxford (3 miles north-west), Lordswood (3 miles north-west) and Eling (4 miles west).
What’s near St Mary's
Around St Mary's, our work takes us to kitchens and buildings near The Joiners pub, Woolston School and Houndwell Park, among other places. The nearest railway station is Southampton Central station, about 0.8 miles west. A little further out are Netley Castle (2.5 miles south-east) and Bargate Guildhall Museum (less than half a mile south-west). For a walk, there’s Netley Common.
Places near St Mary's
Other services in St Mary's
FAQs for St Mary's
Do you work in villages like St Mary's?
Yes, St Mary's is part of our area, however small the site. A survey first, from pictures or a visit, means we arrive with the right kit.
Can the work in St Mary's be done at night or at weekends?
Yes, evening, overnight and weekend work is normal for us. The work in St Mary's can fit around your hours. Tell us your opening hours when you ask for a quote.
What should I send you?
The site address, the type of premises and your opening hours, along with a few pictures and any previous report.
Can we book visits on a schedule?
Yes. Plans on a 3, 6 or 12-monthly cycle are available, to suit the system and how it’s used.
How much notice should we give?
That depends on the slot you want and the size of the job. Tell us your preferred dates when you ask for a quote, and for anything urgent, ring our 24/7 emergency line.
What accreditations do you have?
Our accreditations are CHAS, SafeContractor and ISO 9001, alongside BESCA Vent Hygiene Elite membership, cleaning to BESA TR19® Grease. Vent Hygiene Elite is run by BESCA and independently audited.
What do you clean inside the unit?
All the internal parts the air touches, from intake to discharge, including coils, fan and drain trays. The photo report shows each section before and after.
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. We fit the work around how the site operates.
When something else is needed
AHU cleaning cannot fix everything, and we’ll tell you before we start. It doesn’t solve:
- Breakdowns that need a mechanical engineer
- Airflow problems caused by the system’s design
- Coils that are corroded or leaking and need replacing
If in doubt, phone us on 0345 646 2711, or send details by email and we will say what we think.
Where we work
- Heating and cooling coils
- Dampers and louvres
- Filter sections
- Supply and extract fans
- Drain trays
- Internal panels
The process
Night work is normal for us. A lot of visits happen overnight or at weekends, so the site can open as normal afterwards. On site, the work takes one overnight shift for many single units, with bigger plant phased. For a place like St Mary's, we load the van from the survey notes so the work can be done in one visit where possible.
- First the unit is surveyed, from pictures or a visit, and the scope agreed.
- The unit is shut down with your site team and the area protected.
- Filters, coils, fan section and casing are cleaned in turn.
- Drain trays are cleared and cleaned and the outlet checked.
- A TR19® certificate and photo report follow the clean.
How to prepare
- Tell us about site rules, permits or sign-in
- Allow time for equipment near the work to be turned off and cool down
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
Get a fixed quote
Every quote begins with a look at the system, either from photos and details you send or from a site visit. Then we send a fixed price, before we start.
Read more
Leave it or put it right?
Stuffy rooms and stale smells in a building in St Mary's can sometimes be traced back to the AHU. Cleaning it deals with the cause rather than the symptom. Systems on quieter sites still build up dirt and wear, just more slowly.
Whatever the type of site, the quote works 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 will explain each part.
What you get with us
- A written report with pictures after each visit
- Trading since 2009
- One number for every site across the South East and London
- Fully insured
Read our cost guide and our accreditations.
What the work involves, part by part
Filters
Filter condition tells you a lot about the rest of the unit. They’re photographed before and after for your records.
Internal casing and panels
Damaged internal linings or loose panels can shed material into the air. We note any we find in the report.