Hampshire · Air handling unit cleaning
Air handling unit cleaning in South Down, Hampshire
Our technicians work in South Down on cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces. Fixed quotes, work around your opening hours and photo reports on every job.
- Debris and leaves in the fresh air intake
- Plant that has been serviced but not cleaned
- Dirty coils holding back the airflow
How the visit works
Everything the job needs comes with us, including protection sheets, the right tools and access kit. You only need to give us clear access and switch off what needs to be off. The visit takes a single shift for a typical unit, longer for large or heavily soiled ones. If the van will struggle with a lane or gateway near South Down, let us know and we will plan around it.
- First we agree when the unit can be switched off, including evenings or weekends.
- We take before pictures of each section of the unit.
- Filters, coils and internal surfaces are cleaned from intake to discharge.
- The fan and drain tray are cleaned and the drain checked.
- After pictures are taken and the certificate issued.
How to prepare
- Clear loose items from the work area
- Mention any locked doors, roof access or ceiling voids
- Find the previous report, if there is one
Get a fixed quote
Photos are enough for some jobs, while others need a look on site. Big or complicated sites, and systems that are hard to see in photos, get a survey first. Either way, you get a fixed price before work begins.
Related advice
About our AHU cleaning in South Down
Heating and cooling coils trap dust that gets past the filters. Dirt on the fins holds back air and makes the unit work harder to do the same job. Coils are cleaned carefully, with methods chosen so the fins aren’t flattened. We’re often asked to deal with odours coming through the supply air and air handling units never cleaned inside, on internal panels, heating and cooling coils and filter sections.
For a building in or near South Down, access is agreed in advance and the visit is planned around the journey.
Nothing is signed off by word of mouth: a written report, dated and illustrated with pictures, 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.
- Location
- South Down (SO21)
- Wider area
- Hampshire
- Records
- Written report with pictures
- Price
- Fixed quote, usually within a working day
- Hours
- Overnight and weekend work, 24/7 emergency callout
- Telephone
- 0345 646 2711
- Reviewed
- 30 October 2026
Managing agents and facilities teams in South Down
Managing agents often deal with us directly. Send the address, what’s needed and how access works, and we’ll send a fixed quote.
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 records stay tidy.
What affects the cost of AHU cleaning
Sites vary more than people expect. What affects the quote:
- When the work can happen, such as evenings, overnight or weekends
- Whether we need access equipment or extra panels
- What state the system is in
- The size of the system
A single site or a whole portfolio, the quote is built the same way: what needs doing, how we get to it and when. You’ll have a fixed price before any work starts.
Asking for a quote
What to send for a quote:
- When the site is open and when it’s quiet
- Where the site is and what kind of site it is
- Your last certificate, test record or report
- How we’d reach plant on a roof or in a plant room
Getting a quote doesn’t take long. Call or email with a few details and you’ll normally have a fixed price within one working day. Where a survey is needed, we arrange a time that suits the site.
Honest limits
To be straight with you, there are a few things this work will not fix:
- Faulty motors, drives or bearings
- Controls and BMS settings that run the unit
- Damaged coils beyond cleaning
If in doubt, ring 0345 646 2711 or use the quote form and we’ll say what we think before you book.
What the work covers
- Supply and extract fans
- Dampers and louvres
- Heating and cooling coils
- Filter sections
- Drain trays
- Internal panels
In-house cleaning or a specialist?
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. Reaching it takes a specialist with the right equipment.
Keep a record of what your team does. A simple log of filter washes, wipe-downs and checks helps show that the system is managed between specialist visits, next to our reports.
Why it’s worth doing now in South Down
Leave an AHU uncleaned and the dirt does not stay put. It’s carried through the ductwork and out of the grilles, so cleaning the ducts without the unit only goes so far. It’s worth booking a check, because nobody sees inside a duct day to day.
We do not list prices on the website, because the cost depends on the site in front of us. Call for a fixed quote, and we will talk you through it.
Why us?
- Full insurance on every job
- Ventilation hygiene specialists since 2009
- Work around your opening hours, with 24/7 emergency cover
- A single point of contact for sites across the South East and London
Common problems we fix in South Down
Dirt in an AHU matters in two ways: air quality, since the unit feeds occupied rooms, and performance, since dirt makes it strain. For anyone working, learning or staying in a building in South Down, that’s air they breathe for hours at a time.
Keep an eye out for these warning signs:
- Dirty filters cutting the airflow
- Plant that has been serviced but not cleaned
- Dust built up on fan impellers
- Intake sections clogged with outdoor debris
Healthcare ventilation, from large hospitals like Royal Hampshire County Hospital (about 3.2 miles north) to small clinics, depends on clean filters, coils and ducts.
What to look for in a quote
- Whether the figure could change on the day
- Whether the whole system is included, or only the parts that are easy to reach
- Whether VAT is included
- Whether a survey comes first
Questions from South Down
Do you clean school ventilation in South Down in the holidays?
Yes. The holidays are the usual time for school work. There are about 2 schools, colleges and universities on the FSA’s food hygiene register within about 1.5 miles of South Down. Booking early in the term gives the best choice of holiday dates.
Do you cover smaller places like South Down?
Yes. Villages and rural sites across the South East are part of our work, South Down included. The journey is planned ahead, so a few details about the route help.
Can you look after several sites?
Yes. Send the list of sites and the work at each and you will get one fixed quote.
Are you accredited?
Duct Doctor is a BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease. CHAS, SafeContractor and ISO 9001 are in place too, and we’re fully insured.
Do you look at the system first?
Yes. Photos often do the job, and larger or hidden systems get a visit.
Can you price the work without visiting?
Usually, yes. Send wide shots, close-ups of any access panels and anything that worries you, and a fixed quote normally follows within one working day. If photos are not enough, we will survey first.
Where does the waste go?
Waste is contained during the work and removed when we leave, including grease, debris and dirty water. None of it is left on site.
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.
What AHU cleaning looks like in South Down
Going by the FSA’s register, there are about 7 care, childcare and hospital premises serving food in South Down and the streets around it, up to about 1.5 miles out. Many buildings of this kind have supply and extract ductwork that gathers dust and needs inspecting. About 3.2 miles north of South Down is Royal Hampshire County Hospital, the nearest hospital. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.
Wherever a school like Twyford St Mary's Church of England Primary School has ducted ventilation, a half-term visit keeps the work out of lesson time. If you run an office near Shawford station, its supply ductwork can gather dust for years before anyone looks inside.
South Down is about 3 miles north-east of Chandler's Ford, in Hampshire. Sites in South Down get the same service as everywhere we cover: diagnosis first, a fixed price, out-of-hours working where necessary and a written report with pictures. South Down is one of 683 places in Hampshire where we work for AHU cleaning. We also work in Southampton, around 7 miles away.
We cover every part of the SO21 postcode area for AHU cleaning and the streets around it. AHU cleaning is available to premises on Cross Way, Fairfield Road and Grove Road and the roads around them. Close by, we work in Compton (1 mile north), Otterbourne (1 mile south-west), Shawford (1 mile north-east), Twyford (1 mile east) and Oliver's Battery (2 miles north). Within a short drive, we also cover Winchester (3 miles north), Eastleigh (3 miles south), Fareham (13 miles south-east), Andover (15 miles north-west), Totton (10 miles south-west) and Chandler's Ford (3 miles south-west).
Landmarks near South Down
We work in commercial kitchens and buildings around The Bridge Inn and Thornden School and the streets around them. The closest station to South Down is Shawford station, roughly 0.6 miles north-east of the centre. Nearby you’ll also find Balfour Museum of Hampshire Red Cross History (2.9 miles north) and Wolvesey Castle (3.2 miles north). Green spaces nearby include Twyford Down and Shawford Down.