Signs Your Air Ducts Need Cleaning

Visible dust on registers, dust returning quickly after cleaning, and stale odors are the most common signs your ducts need attention.

Key points

• Dust or debris visible at supply registers
• Dust settles back on surfaces within days
• Musty or stale smell when the HVAC runs
• Uneven airflow between rooms
• Allergy symptoms that worsen indoors

Any one of these is worth a quick inspection. A look inside the return duct often confirms whether buildup is the cause.