When you have an animal living in your home you are bound to get animal odors as well as animal dander in the air. We have found the prozone air purifiers to be very effective in removing both oder and dander from the air we share with out pet. The only drawback that I can see is the area that it will effectively clean. Our house is large and has many rooms. At first we tried to move the purifier with us from room to room but then discovered that did not work when we were in different ends of the house.