Air purifiers, also known as portable air cleaners, are household appliances that improve indoor air quality by removing airborne pollutants from circulation. Many of the best air purifiers boast filters that can trap at least 99.97% of particles measuring as little as 0.3 microns. This means that, in theory at least, they can get rid of smoke, dust, pollen, mold spores, pet dander and many other airborne allergens.
But do air purifiers actually work as advertised, and can they really help people with allergies and respiratory conditions?
