Purchased this purifier for our bedroom. We have 5 indoor cats, and we can't seem to stay ahead of the dust and dander build up on furniture. The laminate floors just add to the problem. I throughly cleaned, vacuumed (with a bissell crosswave pet pro - highly recommended), and dusted. After running the purifier for a few weeks in auto mode, there is a noticeable reduction in dust build up on furniture. It doesn't seem to help much with larger clumps of fur. But the wife feels like the air smells fresher.