How Often Should Air Ducts Be Cleaned? (The Real Answer)

There's no single right answer to how often air ducts should be cleaned — but there are clear guidelines.

The NADCA recommendation

The National Air Duct Cleaners Association recommends professional cleaning every 3 to 5 years for most homes.

When to clean more often

Every 2 to 3 years if you have pets, smokers, recent renovation, persistent allergies, or live in a coastal/industrial zone like Wilmington, San Pedro or El Segundo.

When to clean immediately

After moving into a new home, after any flood or fire event, after rodent infestation, after construction, or when biological growth is visible.

What about seasonal cleaning?

Seasonal cleaning is overkill for most homes. Annual maintenance (coil wash, filter change, blower inspection) is more important than annual full duct cleaning for most households.

Bottom line for Torrance

Most South Bay homes do well on a 3-year cycle. Coastal and industrial-proximity homes benefit from 2-year cycles. Inland-only, no-pet, no-allergy homes can usually stretch to 5 years.