How to inspect AC mold in ducts and fix unit?« Back to Previous Page

Black speckles around AC vents in a Dubai villa are a strong indicator of microbial growth, often caused by condensation from the unit's constant operation in our high humidity. The damp, cold feeling downstairs suggests the AC may be oversized or there's an issue with its drainage, causing excess moisture that mould thrives on.

For a proper inspection, do not attempt to clean or remove the vent covers yourself, as this can disturb and spread spores. A professional inspection is necessary to assess the entire system, including the internal evaporator coil and ductwork, which is where the main colony often resides. In Dubai, look for a provider that uses a borescope inspection to visually confirm growth inside the ducts and takes surface or air samples for lab analysis to identify the species. This documented evidence is crucial for understanding the health risk and planning an effective remediation.

Fixing the unit itself involves addressing the root cause: moisture. A certified HVAC technician should check for correct refrigerant levels, ensure the condensate drain line is clear and properly draining, and verify the unit is correctly sized for the space. Post-remediation, consider installing a UV-C light system inside the AC unit to help keep the coil surface sterile and prevent regrowth.