Ceiling air vent register with faint mold spots on the louvers and staining on the drywall around it

Mold in Air Ducts: How to Identify It and When to Call

A musty, earthy smell when your HVAC system starts is often the first sign of mold in air ducts. The odor is strongest at the vents, and it can return once the blower kicks on even after you have aired out the house. Wiping the register covers is not enough. Growth inside the ducts, on […]

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