How Often to Change Filter in Air Purifier: A Practical Schedule
An air purifier filter usually needs changing every 3-12 months, but the correct interval depends on filter type, daily runtime, indoor pollution, pets, smoke, and the manufacturer’s schedule. Replace activated carbon more often than HEPA media, clean a reusable pre-filter every 2-4 weeks, and change any filter sooner when airflow, odor control, or performance declines. […]