Filters with higher values can catch smaller contaminants like smoke, bacteria and viruses ... All you need is a box fan, good air filters and some duct tape, and you're in business.

Air quality can be impacted by smoke from wildfires. Our reporter set out to build an air filter — in a style the EPA praised, using only things she already had at home.

NEW YORK (AP) — Social media users are sharing a surprisingly effective way to protect yourself indoors from the toxic wildfire smoke blanketing much of the East Coast: a box fan, four air filters and ...

or MERV. Filters with higher values can catch smaller contaminants like smoke, bacteria and viruses.