This is one of the best in-home air purifiers on the market.  The thing runs so quite I cant even tell if it is on.  The air quality is noticeably much better.  We have a dog that lives in the house, and air quality this summer has been not good.  Our house is a safe haven with this thing, I love waking up every morning to crisp clean air.  The built quality is amazing, and very durable.  Filter lasts a long time.