This is a very good air filter, light to handle and easy to use. The Hepa filter is simple to put in. The only reason I give it 4 stars out of 5 is that it does make a constant soft whirring noise, which my son doesn't like; it's wound up in my own bedroom, because I love that noise and am happy to have the air filtered.Get more detail about Honeywell 17000 Permanent Pure HEPA QuietCare Air Purifier.
