How to prevent black mold in a humid DEWA room?« Back to Previous Page

The high humidity in a DEWA/utility room is a classic recipe for black mold, especially with a water heater adding heat and moisture. The most effective long-term solution requires addressing the moisture source, not just the visible growth.

First, verify the moisture source. It's often condensation from the AC drain line, a leaking pipe, or steam from the water heater tank itself. For a permanent fix, upgrading ventilation is non-negotiable. Install an extraction fan that vents directly outside, not into the attic. Run it continuously or use a humidistat to activate it automatically when humidity rises above 50-55%.

Sealing porous walls and ceilings with a mold-resistant, waterproof paint (like epoxy-based) is highly effective after the area is completely dry and remediated. This creates a barrier that prevents spores from taking root. Ensure all pipework is properly insulated to prevent condensation drips.

Given the health symptoms and the confined space, a professional inspection is advised to identify all hidden moisture sources. They can perform a humidity map of the room to pinpoint the exact problem. In Dubai's climate, where AC runs year-round, the condensate drain line is a frequent culprit and should be checked for blockages or improper drainage. A thorough remediation, followed by these moisture control steps, will provide a long-term solution.