Solutions
Humidity Control for Recurring Mold and Condensation
When mold or condensation returns after cleaning or repainting, excess airborne humidity may be one of the underlying conditions that still needs to be addressed.
What you are seeing
Mould may return to the same walls, ceilings, wardrobes, corners or areas around air-conditioning diffusers even after cleaning, repainting or replacing damaged finishes. Condensation may also appear on windows, grilles, cold surfaces or inside concealed spaces, often accompanied by musty odours.
Why it happens
Cleaning removes visible mould but does not necessarily remove the conditions that allowed it to develop. High indoor humidity, humid outdoor-air infiltration, limited air circulation and cold surfaces can repeatedly create local areas where condensation forms and materials remain damp. Water leaks, damaged waterproofing, thermal bridges or other building defects can produce similar symptoms and must be identified separately. A dehumidification system does not replace the repair of an active water leak or construction defect.
The ONYX NOVA approach
ONYX NOVA first assesses indoor humidity, temperature patterns, air circulation, fresh-air entry and the location of recurring condensation or mould. Where excess airborne humidity is a contributing factor, a dedicated ONYX dehumidification system can automatically maintain more stable humidity independently of the air conditioning.
Treated air is distributed to the required rooms and problem areas, helping reduce condensation risk and create conditions that are less favourable for mould to return. Existing mould must still be professionally cleaned, and any leaks or building defects must be repaired separately.
The final solution is selected according to the source of the problem, property layout, affected areas and measured operating conditions.
Learn more about ducted humidity-control systems, read why mold returns after cleaning and repainting, or see how this relates to high indoor humidity.
Technical note: Final equipment selection and expected performance depend on site conditions, system design, outdoor-air conditions and professional assessment.
Suitable product families
Product families typically considered.
Related reading
Understand the background.
Why does mould return after cleaning and repainting?
Cleaning removes what is visible on the surface. If the conditions that allowed growth remain, the same surfaces stay at risk.
Read articleWhy Your AC May Cool the Room but Not Control Humidity
A room can feel cool and still have excessive humidity. Cooling the air and removing moisture from it are related, but they are not the same HVAC task.
Read articleWhat causes condensation around AC diffusers?
Water forming at or around a diffuser indicates that surfaces are reaching the temperature at which moisture in the air condenses.
Read article