There are a number of HEPA filters on the market and they aren't all the same. The Blueair air filter is super quiet so you won't even hear that it is running. It also has an intuitive sensor system that turns on only when it's needed. Air filtration is a must for pet owners and households in general. Even if you don't have allergies, clean air is highly beneficial to our well-being. This particular model is capable of keeping a 17'x10' room smelling fresh