Hampshire · Air handling unit cleaning

Air handling unit cleaning in Winchester, Hampshire

For cleaning of air handling units, including filters, coils, drain trays, fans and internal surfaces in Winchester, one call is all it takes, from survey to sign-off. CHAS and SafeContractor accredited, ISO 9001 and fully insured.

  • Blocked condensate drains and slimy trays
  • Dust built up on fan impellers
  • Units that have only ever had filter changes

Need AHU cleaning in Winchester?

Winchester buildings and their air

Going by the FSA’s register, there are about 15 schools, colleges and universities, about 37 hospitals, care homes and childcare premises and about 5 hotels, B&Bs and guest houses serving food in and around Winchester, up to about a mile and a half out. Busy, occupied buildings like these are where clean supply air matters most. About under half a mile east of Winchester is St John's Rooms And Chapel, the nearest hospital. Clean air matters most where people are unwell, and that’s as true in a care home as in a hospital.

If you manage shops or offices close to Winchester station, a TR19® Air inspection shows whether the ductwork needs cleaning. For schools like St Bede Church of England Primary School, the holidays are the usual time to inspect and clean ventilation.

Winchester is in Hampshire. Across the SO22 area, we can carry out AHU cleaning at your premises. Our area takes in 683 places across Hampshire, large and small. You can also see our page for Southampton, about 10 miles away.

Every address in SO22, SO23, SO32 and SO21 is covered for AHU cleaning, from busy streets to back roads. If you need AHU cleaning at premises on The Square, Market Street and Market Lane or anywhere close by, we can help. Winchester is on the A31 and A32, which makes it straightforward for our technicians to reach for out-of-hours visits. Neighbouring places we cover for AHU cleaning include Bar End (1 mile south-east), Highcliffe (1 mile east), Hyde (1 mile north), St Cross (1 mile south) and Stanmore (1 mile south-west). Larger places within reach include Eastleigh (6 miles south), Fareham (15 miles south), Andover (13 miles north-west), Totton (13 miles south-west), Chandler's Ford (6 miles south-west) and Hedge End (10 miles south). Winchester is among the bigger places we cover in Hampshire for AHU cleaning.

Near you in Winchester

We work in commercial kitchens and buildings around Peter Symonds College, The Green Man pub and Leigh House Hospital and the streets around them. Winchester’s nearest station is Winchester station, about 0.6 miles north. A little further out are Winchester City Museum (under half a mile north-east) and St John's Rooms And Chapel (within half a mile east). Open spaces near Winchester include Winnall Moors and Twyford Down.

Map of Winchester © OpenStreetMap contributors

How we handle AHU cleaning in Winchester

Our AHU cleaning covers sites in Winchester and the rest of Hampshire, in buildings such as offices, schools, healthcare sites and shops. The work is timed around when the system can be switched off, including evenings, nights and weekends. The work covers filter sections, internal panels and supply and extract fans, and common reasons people get in touch are plant that has been serviced but not cleaned and debris and leaves in the fresh air intake.

A place as big as Winchester has offices, schools and hotels, many with ducted supply and extract ventilation. Dust in a supply duct ends up in the air people breathe, so cleaning is based on what an inspection finds.

For insurers and inspectors, the record counts. So every job comes with a written report and photos, and grease extract cleans come with a TR19® certificate issued through the BESCA Vent Hygiene Elite portal.

The Duct Doctor team standing beside their branded white and blue vans
Where
Winchester (SO22, SO23, SO32, SO21)
Wider area
Hampshire
Paperwork
Photo report after every visit
Quote
Fixed quote, usually within a working day
Working hours
After hours by arrangement; emergencies any time
Phone
0345 646 2711
Page updated
30 October 2026

How the visit works

Every visit runs to the same pattern: sheeting and protection first, isolate whatever needs isolating, do the work, clear away and leave you the report. On site, the work takes a single shift for a typical unit, longer for large or heavily soiled ones. For a managed building in Winchester, let us know about sign-in, permits and who holds the keys.

  1. We agree a shutdown window that suits the building.
  2. We take before pictures of each section of the unit.
  3. We work through the unit from the intake to the outlet.
  4. The fan and drain tray are cleaned and the drain checked.
  5. We take after photos and issue the certificate and report.

Getting ready for the visit

  • Arrange a key holder or contact on site
  • Dig out any earlier paperwork for the system
  • Let us know when the site is closed or quiet

Getting a quote

Want a quote for AHU cleaning? Please give us a ring on 0345 646 2711 or email us and tell us about the site. We’ll explain what we’d do and send a fixed quote before anything is booked.

Get a price

Advice

Part by part

Rooftop and plant room units

Smaller units in ceiling voids are part of the work as well. The space underneath is protected with sheeting first.

Internal casing and panels

We open each section through its doors and close them securely when we are done, and check every one is shut.

Common problems we fix in Winchester

Cooling coils create condensation, and that water has to go somewhere. A blocked outlet or a badly sloped tray leaves standing water, and slime and smells soon follow.

If you notice any of these, it’s worth a diagnosis:

  • Air handling units with blocked filters
  • Odours coming through the supply air
  • Condensate trays that will not empty
  • Dirty coils holding back the airflow

Healthcare buildings such as St John's Rooms And Chapel, about within half a mile east, depend on their ventilation; if you manage a surgery, clinic or care home near Winchester, yours matters too.

What your quote should include

  • How areas they cannot reach will be recorded
  • Which accreditations they hold, and whether you can check them
  • How they set the interval to the next visit
  • Whether VAT is included

Our hiring checklist

Staff cleaning versus specialist work

Some jobs should never be done in-house: opening up ductwork, cleaning fans, drop testing fire dampers and measuring grease call for the right kit, training and safe access. Leave those to us.

For ventilation and air handling systems, in-house care is mostly about checks: keeping grilles clear, noting unusual noise or smells and logging filter changes. The inside of ducts and units needs a specialist.

What happens if it’s left?

A clean unit feeds cleaner air into the ductwork, so the whole system stays cleaner for longer. It also means the next inspection has less to find. Dirt and wear build up fastest on busy sites, and a place the size of Winchester has plenty of those.

What you pay depends on the size of the system, the condition it’s in and how easy it is to reach. You get a fixed price before we start, so there are no surprises.

What you get with us

  • Fixed quotes from a survey or pictures
  • We’re fully insured
  • CHAS, SafeContractor and ISO 9001
  • In business since 2009

See what affects the cost and our accreditations and certificates.

Between visits

Think of this as the after-treatment advice, short and simple:

  • Make sure condensate is draining away
  • Keep the certificate and photo report with the plant records
  • Report stiff or damaged access doors
  • Keep filter changes on time and recorded

Once the clean is done, we send a TR19® certificate and a report with before and after pictures. Keep both with the building’s maintenance records.

Have the unit inspected regularly, in line with the risk-based approach of TR19® Air, rather than waiting for a problem.

When something else is needed

To be straight with you, some problems need a different fix:

  • Ventilation that was badly designed in the first place
  • Faulty motors, drives or bearings
  • Damaged coils beyond cleaning

If you are not sure, just ring 0345 646 2711 or email us and we will give you a straight answer before you book.

Where we work

  • Internal panels
  • Supply and extract fans
  • Drain trays
  • Filter sections
  • Heating and cooling coils
  • Dampers and louvres

Winchester: your questions answered

Do you offer AHU cleaning in Winchester?

Yes. Our area runs across London and the South East, Winchester included. You can call 0345 646 2711, or send details by email and tell us what needs doing.

Do you work overnight in Winchester?

Yes, we can come after you close and finish before you open. It means the site in Winchester keeps running as normal. When you ring 0345 646 2711, or send details by email, mention when the site is quiet.

What does TR19 mean?

TR19® is BESA’s specification for ventilation hygiene. Since 2019, TR19® Grease has been a standalone specification for grease in kitchen extract systems, while TR19® Air covers other supply and extract ductwork.

Do you have a 24/7 line?

Yes, day and night, every day of the year. Our office is open from 8am to 6pm on weekdays, and the emergency line covers the rest.

Is there a survey before the work?

Yes, always. We diagnose before we treat: the survey shows what needs doing and what access we need, and the quote is based on that.

Is there a report after cleaning?

Yes. A TR19® certificate and photo report are sent after the clean, including anything we think needs attention.

How do you keep the site clean during the work?

By covering it before any work starts. We keep the work contained and clean down when we finish.

What about areas you cannot get to?

Anything we cannot reach goes on the report, with pictures where possible, and we tell you what would make it reachable, for example new access panels.

BESCA Vent Hygiene EliteMember, cleaning to BESA TR19® Grease
CHAS · SafeContractorISO 9001 and fully insured
Certificate and photo reportWith every clean
24/7 emergency calloutEvenings, nights and weekends
Since 2009South East England and London