How Often Should Air Ducts Be Cleaned? (2026 NADCA Guidelines)
The NADCA Baseline
The National Air Duct Cleaners Association recommends cleaning every 3 to 5 years for standard households — a schedule that balances air quality, HVAC efficiency, and reasonable cost.
Aura Home Experts follows NADCA ACR 2021 standards on every job, including negative-pressure containment, source removal, and post-cleaning verification.
When to Shorten the Interval
Every 2–3 years: homes with 2+ pets, smokers, active allergies or asthma, or older homes with original ductwork.
Immediately: after any renovation or drywall work, after a plumbing leak or flooding, after mold discovery elsewhere in the home, or after evidence of rodents or insects in the vents.
Signs You've Waited Too Long
Dust puffs from registers, worsening allergy symptoms, musty smells, uneven room temperatures, higher-than-normal energy bills, or visible debris around vent covers.
Ignoring these signs allows contaminants to recirculate 5–7 times per day through your living space.