I spend a lot of time in our primary bedroom and I have a stuffy and runny nose. and each time I leave the primary bedroom everything clears up. This has been going on for years and my ENT prescribed two nasal sprays. My husband purchased the Dyson - Dyson Purifier Hot+Cool™ HP07 and after one day of using it I noticed a big difference. We have had it for approximately 6 weeks now and I can’t imagine not having it. Love it!