How Often to Change Furnace Air Filter: 30-90 Days
Most furnace air filters should be replaced every 1-3 months, but the correct interval depends on filter thickness, MERV rating, airflow hours, pets, dust, smoke, and household health needs. Replace a 1-inch filter about every 30-90 days, inspect it monthly, and replace it sooner when the filter media is visibly loaded or airflow decreases. Key […]