I've had my air purifier now for about 2 weeks, and what a difference it makes in my quality of life, and quality of air.I bought this because I am unable to open my bedroom windows due to the presence of 12 dryer vents (from my building's laundry room) being about 3 yards from my windows, and expelling steam, fiber dust, and fragrance virtually 24/7. I have plenty of fresh air elsewhere in my condo from windows that I can open, so the bedroom had become something of a dead air space.The Honeywell HHT-011 makes the air in my bedroom smell fresh and sweet. I am sleeping better and feeling better overall. My bedroom is about 14' x 22', and this size works perfectly.Great product. I highly recommend it.