How air purifiers work. Air purifiers essentially work by sanitizing the air, which may include pollutants, allergens, and toxins. They're the exact opposite of essential oil diffusers and humidifiers, which add particles to indoor air. Air purifiers also act differently than filters.

Do air purifiers really work for Covid?

Portable air cleaners and HVAC filters can reduce indoor air pollutants, including viruses, that are airborne. By themselves, portable air cleaners and HVAC filters are not enough to protect people from the virus that causes COVID-19.

How do air purifiers work?

How does an air filtration system work? ... Essentially, air purifiers use internal fans that pull air into your home, and then this air will move through a series of air filters which can range in their abilities to catch such air pollutants and airborne particles such as pollen, bacteria, and dust.