The clorox medium room air purifier is the best air purifier I have used. It blinds into the room so it doesn't stand out, it's easy to turn on and it gives me a read on the air quality in my home based of numbers and colors. When an impurity is in the air a fan turns on and clears it away. The fan can get a bit loud sometimes but it doesn't stay on for long. I'll be giving these out as gifts to my family.