Coil & Filter Deep Clean
The evaporator coil and washable filters are stripped down and cleaned by hand.
What's Included
What Goes Into a Full Cleaning & Disinfection Visit
An air conditioner is essentially a box that pulls warm, humid room air across a cold, wet coil — which is exactly the environment mould and bacteria like best. Wiping the front panel or rinsing a filter under the tap barely touches that problem, so our visits go further.
- ✓Removal, washing and drying of the washable air filters
- ✓Deep clean of the evaporator (indoor) coil, where mould and biofilm build up unseen
- ✓Fan wheel cleaning, since a dust-caked blower recirculates particles and cuts airflow
- ✓Condensate drain flush to clear the sludge that causes leaks and musty smells
- ✓Full wipe-down and disinfection of the plastic housing, fascia and louvres
- ✓Antibacterial and antifungal treatment applied to the coil and drip tray
- ✓Optional fogging or nebulizing treatment for units with heavier mould or odour
- ✓Odour-neutralising step so the unit smells clean, not just "chemical"
- ✓Quick check of the outdoor unit coil for dust, leaves or blocked airflow
- ✓Eco-certified, non-corrosive disinfectant products safe for use around food and children
- ✓Airflow and odour test once the unit is reassembled and switched back on
- ✓Short written note flagging anything else worth knowing, such as a worn filter
On Site
Where the Dirt Actually Hides
Most of what makes an AC unit smell or perform poorly is invisible from the front — it's on the coil fins, inside the fan wheel and along the drain path.
Kitchens & High-Traffic Rooms
Grease and cooking odours clog filters faster here, so these rooms need more frequent cleans.
Clear Answers Before We Start
We explain what we found and what we're treating before any disinfectant is applied.
Signs You Need This
How to Tell a Dirty Unit From a Faulty One
These symptoms often get mistaken for a mechanical fault, when the real cause is simply years of buildup inside the unit.
- ✓A musty, damp or "gym locker" smell in the first minute or two after switching on
- ✓Visible dust, dark specks or mould around the vents or on the front louvres
- ✓Anyone in the household with allergies, asthma or sinus issues that flare up indoors
- ✓No professional cleaning or maintenance in the last 12 months or more
- ✓Visible dust being blown out of the vents when the unit first starts
- ✓Water dripping or pooling under the indoor unit, often a sign of a blocked drain
- ✓Airflow feels noticeably weaker than when the unit was new
- ✓The property is a rental or Airbnb used by many different guests between cleans
Our Process
How We Clean and Disinfect an AC Unit
We treat the whole air path, not just what's visible behind the front cover, so the improvement in smell and airflow is noticeable straight away.
Book the visit
Tell us the symptoms — smell, allergies, visible dust — and we schedule accordingly.
Inspect & assess
We check the coil, filters and drain to gauge how much buildup and contamination there is.
Filter & coil clean
Filters are washed and dried; the coil and fan wheel are cleaned by hand.
Disinfection
Antibacterial and antifungal treatment is applied to the coil, drip tray and housing.
Fogging (if needed)
Heavier mould or odour cases get a fogging treatment to reach the wider air path.
Reassemble & test
Drain is flushed, unit reassembled, and airflow and smell are checked before we leave.
Pricing
What Affects the Price
Cleaning and disinfection starts from EUR 89 per unit. A handful of factors move the final number, and Square Meter always confirms it in writing before starting.
| Factor | Why it matters |
|---|---|
| Number of indoor units | Each split, cassette or ducted zone has its own filters, coil and drain to clean. |
| Level of contamination | A unit that's never been cleaned takes longer and needs more thorough treatment than one on a regular schedule. |
| Fogging or nebulizing needed | Heavier mould, strong odours or allergy-sensitive households often benefit from an added fogging treatment. |
| Unit type & access | Ducted and cassette units usually take longer to access and reassemble than a wall-mounted split. |
| One-off visit vs. maintenance contract | Cleaning bundled into an annual maintenance contract works out cheaper per unit than a single stand-alone visit. |
Why Square Meter
What a Full Clean Actually Covers
As the air conditioning arm of the wider Square Meter renovation, plumbing and electrical group, we're used to working cleanly and carefully inside occupied homes — sheets down, no mess left behind, and products safe to be around straight after we leave.
Eco-Certified Products
Biodegradable disinfectants, safe for children, pets and food-prep areas once dry.
English-Speaking Engineers
Clear explanations of what was found and treated, no technical jargon left unexplained.
2-Year Written Warranty
Backed by the same workmanship guarantee we put behind every installation and repair.
Coverage
Cleaning & Disinfection Across Valencia
We carry filter-safe cleaning products, coil brushes and fogging equipment on every van, so most visits across these areas are completed in a single call-out.
ValenciaMislataBurjassotPaternaTorrentAlborayaManisesQuart de PobletRuzafaBenimacletCampanarPatraixExtramurs
FAQ
Cleaning & Disinfection Questions, Answered
What Valencia homeowners, landlords and allergy sufferers most often ask before booking.
A musty smell almost always comes from mould or bacteria growing on the damp evaporator coil or in the condensate tray, which releases a stale odour into the airstream every time the fan starts, particularly after the unit has sat unused for weeks.
A basic filter clean removes dust from the washable mesh filters in a few minutes, while a full disinfection service also cleans the evaporator coil, fan wheel, housing and drain, then applies an antibacterial and antifungal treatment, sometimes including fogging, to remove growth a filter wash cannot reach.
Yes; a coil or filter carrying dust, mould spores or bacteria recirculates those particles into the room every time the unit runs, which can trigger or worsen allergy and asthma symptoms in sensitive household members.
Square Meter recommends a cleaning and disinfection visit once a year for lightly used household units, and twice a year for units in Airbnb rentals, offices, or homes with allergy-sensitive occupants or pets.
Square Meter uses biodegradable, food-industry-safe disinfectant products for fogging treatments, and rooms are ventilated for a short period afterward, so the treatment is safe for children and pets once the room has aired out.
Related Services
You Might Also Need
Cleaning pairs naturally with these other repair and maintenance services.
Book a Cleaning & Disinfection Visit
Call or WhatsApp Square Meter to get your AC units properly cleaned and disinfected — fresher air, no musty smell, and a written warranty on the work.