Is AC mold causing our cough and itchy eyes?« Back to Previous Page

Yes, the black, fuzzy growth on your AC filter is almost certainly mold, and it is highly likely the cause of your persistent cough and itchy eyes. The symptoms clearing up when you leave the bedroom is a classic indicator of an indoor environmental issue, specifically Sick Building Syndrome often triggered by microbial growth in AC systems.

In Dubai's climate, the constant cycling of high humidity outside and cold, condensing surfaces inside AC units creates an ideal breeding ground for mold. A small, persistent leak provides the moisture mold needs to thrive. When the AC runs, it aerosolizes these spores and fragments directly into your breathing space, causing the respiratory irritation you're describing.

You should immediately stop using that AC unit. The filter itself is a lost cause and needs to be replaced. However, the mold on the filter is just the visible tip of the iceberg; the internal cooling coils, drain pan, and ductwork likely have significant colonization that you cannot see.

For a situation with active symptoms and visible growth, a professional inspection and remediation is strongly advised. DIY cleaning sprays are often ineffective and can disturb spores, making the problem worse. A proper remediation involves containing the area, using HEPA vacuums, and applying EPA-approved biocides to the entire system. Afterwards, a third-party test or post-remediation verification is the only way to confirm the environment has been returned to a healthy state. Resolving the underlying leak is, of course, critical to prevent it from returning.