A large area of greater Los Angeles had unhealthy air Friday, due to particulate matter from large wildfires. Here are tips for breathing cleaner air indoors if it's smoky outside.

The best air purifiers can help filter fine particles, gases and other pollutants from the air you breathe. See our top picks ...

The TP09 arrived in classic Dyson packaging, with a visual of the product's design on the outside. Inside the box, the fan and ... from the room. The HEPA filter helps to trap super-fine particles ...