My Conair Medium Room Air Purifier works wonders. It didn't just remove the allergens in the air  I know because major sinus allergies to environmental allergens and I started feeling better after a couple of days using it. I was very pleased  Also it took care of the slight smell of dog in my bedroom where I set it up . I had already washed my dogs blankets from his bed but an odor still lingered . Not anymore!! The only thing I might change about the Air Purifier is to make it a tad quieter. That's it !! Otherwise I think it's great all around  Thank you Conair and Pinchme for the wonerful opportunity . I am blessed.. Thank You again .