How often should air filters be changed?

Most standard 1-inch air filters should be changed every 30 to 90 days, depending on your HVAC usage, home size, pets, and allergies. Thicker or high-efficiency filters may last longer. As part of our Care Club, Done Plumbing, Heating, Cooling & Electric monitors and maintains your air filters during scheduled tune-ups—so you don’t have to guess when it’s time to swap them out.