Health experts also reveal how air purifiers work to prevent illness and where you should put them in your home.

Delhi’s air quality remains hazardous, pushing many to rely on air purifiers. Are they safe, and can overuse harm your lungs?

Since I first started reviewing air purifiers for WIRED in 2018, I’ve tested dozens and dozens of the health-protecting appliances, usually for months at a time. I started out looking into how to ...