For Smaller Rooms: Blueair Blue Pure 411 Air Purifier
If you're looking for something for the bedroom, then try the Blueair Blue Pure 411 Air Purifier ($140). It's great for spaces up to 190 square feet. Plus, this model is one of the brand's newer, smarter options that features technology that senses the air for you. This way it knows what speed and efficiency to work at without you even having to adjust it.