Love this air purifierHEPA filter!  Have allergies but am a foster mom for kittens and have a special needs St. Bernard- so the furdander literally flies sometimes.  I have it in the livingroom, which opens onto the kitchendining area and is the main part of the house when you enter.  This filter does a wonderful job of keeping the dander down and the smell from the litter boxes is noticeably reduced!  So happy with my purchase I bought another one for my bedroom, so the whole house is managed.  Itchy, watery eyes and runny nose - not a problem anymore.  My only regret is that I hadnt bought them sooner!