Could mold behind AC be causing our sickness?« Back to Previous Page

Yes, the black mold behind your AC unit is very likely causing the persistent coughing and headaches you're described. This is a common scenario in Dubai villas, especially after periods of heavy rain like we had in January, which can lead to hidden water intrusion and elevated indoor humidity.

The continuous operation of AC units creates a significant temperature difference between the cooled room and the warmer wall cavity, leading to condensation inside the walls. This damp, dark environment is an ideal breeding ground for mold. The airflow from the AC can then aerosolize the spores and distribute them throughout your living space, which is why symptoms are often worst in rooms with hidden mold growth.

For a situation of this visible size and with clear health symptoms, a professional inspection is strongly recommended. They can assess the full extent of the growth, which often spreads behind walls, and identify the moisture source. In the UAE, remediation should follow standards like the IICRC S520 to ensure it's properly contained and removed, not just wiped away, which can make the spore problem worse.

Until a professional can address it, improve ventilation in the room by opening windows when outdoor humidity is lower, typically in the early morning or evening. Ensure your AC drain line is not clogged, as this is a frequent cause of hidden moisture. Do not attempt to clean large patches yourself with bleach, as this can aggravate the issue. A proper assessment will determine the species and the required remediation protocol.