June 13, 2018 at 2:12 pm #2244 Teresa KraussParticipant True Hepa 310 sq ft Allergen Remover Air Purifier We purchase 2 of these units to cover our raised rancher open floor plan house. We have 5 dogs home at any time, and sometimes as many as 8 in the house. Our dogs aren’t big shedders (Brittanys) but they do track in dirt and mud from outside, creating large amounts of dust. We just replaced carpet floors with wood, and wanted to keep dust down going forward (from us and the dogs, we also have horses, so we track in mud/dirt too)… This leads to an extraordinarily dusty house. These filters have cut our dust down by more than half, and have kept the air MUCH cleaner going forward. We typically leave one on all the time, and the other on about half the time. I frequently clean the large particle filter in the sink… and we have spare HEPA filters when they are due. We’ve owned these about 2 months now, and are extremely happy with them. They do NOT run quiet, but have 3 speeds (and off) of fan. The lowest setting is tolerable to be on and still hear the TV without having to crank up the volume. The fan controls are “soft touch” and the dogs have figured out how to change the speeds themselves (and it scares them every time they do).