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About Air Duct Cleaning
Air duct cleaning removes accumulated dust, debris, mold spores, and contaminants from your home's duct system — the network of passages that circulates heated and cooled air throughout your home. The EPA recommends duct cleaning when there's visible mold growth, evidence of rodent infestation, or ducts so clogged with debris that airflow is restricted.
In cities with poor outdoor air quality — particularly in California's San Joaquin Valley, which consistently ranks among the nation's worst for particulate matter — more frequent duct cleaning is warranted. The same applies after major renovations, after purchasing an older home, or if household members have respiratory conditions that are worsening indoors.
What professional duct cleaning involves
A legitimate duct cleaning service uses high-powered vacuums, brushes, and compressed air to dislodge and remove debris from supply ducts, return ducts, registers, and the air handler. The process takes 3-5 hours for an average home. Be skeptical of companies offering whole-home duct cleaning for under $99 — that's typically a bait-and-switch tactic.
Frequently Asked Questions
How often should air ducts be cleaned?
The National Air Duct Cleaners Association (NADCA) recommends cleaning every 3-5 years for most homes. Homes in areas with poor air quality, homes with pets, or homes where residents have allergies or asthma may benefit from more frequent cleaning.
Does duct cleaning actually improve air quality?
Research is mixed on the broad claim that duct cleaning improves air quality in all homes. However, for homes with confirmed mold, pest debris, or heavy dust accumulation in ducts, cleaning provides clear benefit. Have ducts inspected before committing to cleaning.
What should duct cleaning cost?
Professional duct cleaning for an average home runs $300-$600. Be wary of prices significantly below this range — they typically reflect incomplete service or are designed to upsell add-on services once the technician is in your home.
Can I clean my own air ducts?
You can vacuum visible debris from registers yourself, but the main trunk lines and return ducts require professional equipment to clean properly. DIY cleaning typically addresses 5-10% of the actual duct surface area.