How Often Should You Replace Your Furnace Filter?

A clogged filter is the number-one cause of avoidable service calls. When air can't move freely, your system works harder, costs more to run, and wears out sooner.

A simple schedule

• 1-inch filters: every 1–3 months.
• 4- to 5-inch media filters: every 6–12 months.
• Homes with pets or allergies: check monthly.

Signs it's overdue

Hold the filter up to the light — if you can't see through it, replace it. Other clues include weaker airflow, more dust on surfaces, and higher energy bills. Changing a filter takes two minutes and protects a system worth thousands.

Make it effortless

Our Precision Tune-Up maintenance plans include seasonal checks so your filter and full system stay in top shape — no remembering required.