Air conditioning cleaning
Deep cleaning of coils, fans, trays and drains for fresher, more efficient units. Priced before we book, with a written report after.
- Visit price agreed before we book
- Written report after every visit
- F-gas records updated where required
What is air conditioning cleaning?
Air conditioning cleaning is a deep clean of an indoor unit's filters, heat exchanger coil, fan, condensate tray and drain, and the outdoor unit's coil. It removes dust, grease and biological growth that cause smells, reduce air flow and raise running costs.
In the UK, expect around £95–£245 per indoor unit, plus VAT. A typical job (deep clean of 2–4 wall or cassette units) is £345–£795 plus VAT.
Units in kitchens, gyms, salons and busy offices collect grease, hairspray, skin flakes and dust. Over time the coil clogs, the fan wheel gets coated, and the drain tray grows slime — which is where musty smells come from.
A deep clean goes further than a routine service: the unit is opened up, the coil cleaned with a suitable cleaner and rinsed, the fan wheel cleaned, the tray and drain flushed and treated, and the outdoor coil cleaned so the system can reject heat properly.
Where it suits
- Units with musty smells
- Kitchens, cafés and bakeries
- Gyms and studios
- Salons and spas
- Healthcare and dental settings
- Units not cleaned for over a year
What is included
- Filter wash or replacement
- Indoor coil clean and rinse
- Fan wheel / barrel clean
- Condensate tray and drain flush with treatment
- Outdoor coil clean
- Before-and-after check of air flow and temperatures
How a visit is carried out
Protect
Floors and furniture are covered and the unit isolated.
Strip down
Covers, filters and (where practical) the fan are removed for cleaning.
Clean
Coils, fan, tray and drain are cleaned and rinsed into a collection bag.
Test
The unit is reassembled and run, with temperatures checked.
AC cleaning prices
National guide prices for 2026. Local pages show prices adjusted for each region.
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Wall-mounted unit deep clean | £95–£175 | £114–£210 | per unit |
| Ceiling cassette deep clean | £145–£245 | £174–£294 | per unit |
| Ducted unit and grilles clean | £195–£395 | £234–£474 | per unit |
| Outdoor coil clean | £65–£145 | £78–£174 | per unit |
Ex VAT. Heavily soiled kitchen units may take longer and cost more.
Often combined with a service visit to save a separate attendance.
Typical job: deep clean of 2–4 wall or cassette units — £345–£795 plus VAT.
Things to plan for
Smells
Musty smells usually mean biological growth in the coil or tray; a deep clean and drain treatment normally cures them.
Grease
Units near kitchens need cleaning more often, and sometimes relocating.
Downtime
Each unit is out of action for about an hour while it is cleaned.
Frequency
Most units need a deep clean every one to two years; kitchens and salons more often.
Questions about AC cleaning
Why does my air conditioning smell?
A musty smell usually comes from mould or bacteria in the coil, tray or drain. A deep clean and drain treatment normally removes it.
How often should units be deep cleaned?
Every one to two years in offices; every three to six months near kitchens, in gyms or salons.
Is cleaning included in a service?
A service includes filter cleaning and coil checks. A deep clean strips the unit down further and takes longer.
Will cleaning reduce running costs?
Clean coils and filters let the unit move air and exchange heat properly, which reduces the energy it needs to reach temperature.
Premises we fit this for
AC cleaning near you
Choose your county or region for local guide prices and the towns we cover.
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- County Durham
- Cumbria
- Derbyshire
- Devon
- Dorset
- East Riding of Yorkshire
- East Sussex
- Essex
- Gloucestershire
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- London
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Scotland
What happens next
Tell us what you need
Use the form, the quote tool, live chat or call us. A postcode and the type of premises is enough to start.
Survey or visit
For mainland installations we survey free of charge. Service and repair visits, and travel to remote locations, are priced before we book.
Written quote
You get the specification, the price and the programme in writing, including any landlord or planning points.
Work and handover
We install, service or repair around your hours, then hand over the commissioning and F-gas records.
Tell us about your premises
Send a few details and we will arrange a survey or call you back with a guide price.