How often should air ducts be cleaned?

Why duct cleaning frequency varies by home

Ductwork collects whatever the house produces: dust, pet dander, pollen pulled in through returns, and construction debris. A newer suburban home with good filtration may stay reasonably clean for years, while an older Philadelphia rowhome with decades-old ducts, or any house fresh off a remodel, can load up much faster. Drywall sanding and demolition dust in particular settle deep in supply runs and get redistributed every time the blower starts. That is why the three-to-five-year guideline is a starting point, not a rule.

Signs your ducts are due now

• ✓Visible dust puffing from supply registers when the system starts
• ✓A renovation, flooring replacement, or drywall project was recently completed
• ✓Evidence of mice, insects, or nesting material in vents
• ✓Musty odors when the heat or AC runs
• ✓Filters that load up with dust unusually fast
• ✓You just bought an older home and do not know the duct history

What a proper cleaning involves

A thorough job follows NADCA-standard methods: the system is put under negative pressure with a high-powered vacuum while agitation tools work debris loose from supply and return runs, registers, and the main trunks, so dust is captured rather than blown around the house. It pairs naturally with dryer vent cleaning, which is a fire-safety task as much as an airflow one. PJ MAC HVAC handles both, along with filtration and indoor air quality upgrades if dust keeps returning.

PJ MAC HVAC is family owned and reachable 24/7, so questions about your ductwork never have to wait for business hours.