3M AC Filters for converting Split AC into air Purifier [Dust, Pollen & Allergens, 4 Sheets, 2 Change Indicators] Air Purifier Filter  (HEPA Filter)

Living in or near a polluted area is not the only cause of air pollution in your home. Seemingly harmless activities such as cleaning and cooking can release allergens and pollutants into the air. Developed by 3M engineers, the air filter helps trap PM2.5 and other pollutants in the air. It's charged with static electricity which acts like a small magnet to attract and capture small particles from the air when it passes through the filter. With 3M AC filters, your family will breathe cleaner and healthier air. Electrostatic filters are most effective when they're new and clean. Make sure you're changing your filter at least every three months for maximum effectiveness.