Lo.ng for the best air purifier? Consumer Reports has honest ratings and reviews on air purifiers from the unbiased experts you can trust..When speaking of air filtering, the aspect of bad odors comes into the discussion because air impurities which cause a bad scent are responsible for ruining the.Alen BreatheSmart air purifier for large rooms up to sq. ft. The BreatheSmart air purifier is easy to use with Smart Sensors. Lifetime Warranty, Free Shipping, day no h.le returns..If you are sensitive to allergens and odors, which air purifiers work best? Editors look at the various types of air purifiers to find top choices..