 Right where they are. Plus, you don't have to worry about getting air filters every month. It's going to save you a bunch of money, too. The profile of the Eden Pure Thunderstorm air purifier is small. Plugs right into the outlet. And once you do that, it's in the outlet. It's going to be out of the way. No big cords to trip over. It's going to do the job. You'll know what room you have it in because it's going to smell great. To get a special deal, three units for under $200. You're going to save $200 right now.