I feel so much better having this air purifier in my home.  When I first plugged it in it had to work a little harder to get the air clean but since then it hasn't hardly ran at all.  Now it only runs when it picks on on some irritants or something.   I am hopeful that I will be able to dust less often because it is supposed to help cut down on the amount of dust particulars so I am hopeful.  Overall I am loving it!