The advice is always the same: Change the air filters for your home's heating and air conditioning system every 90 days. But also: Do it more often if you have pets or allergies. How often is more ...

I tested an AirDoctor air purifier for over six months to find out if it's worth the splurge.

There's nothing better than feeling that first blast of warm air when you finally give in and crank up the furnace because of the chilly winter weather. That cozy feeling should also remind you that ...