I absolutely love this purifier.I use this Shark air Purifer in the basement. As I always feel the basement has smells. I turn on the small air purifier 24 hours in the basement but, I still  don't feel good enough. This Shark air Purifer is a bit big but really can clean the smells, I can feel the fresh air now. Highly recommended. My friend has a dog and she plans to get one too.