Works amazing and I love how you can rinse out the filters which should be done once a week as the dust and dander do build up. I run 2 of them...our house is 1200 sq ft. I run one in the living dining kitchen area and one in our bedroom. We have 3 indooroutdoor dogs and we have noticed a considerable difference in the reduction of dust and dander. It’s quite amazing!! I’ve been running them virtually non stop now for a month and a half and our power bill went up less than 10 dollars as they are energy efficient.