Add a little greenery
Install a living air filter—houseplants! Some of the most efficient air-cleaning houseplants include Spider plants, English ivy, rubber plants, and peace lilies. You’ll need 15 to 18 medium-sized (6 to 8-inch diameter container) houseplants for the average 1,800 square foot house. If that sounds like a lot, place a few plants in the room where you spend the most time.