excellent product
excellent product. whisper quiet and seems to make a noticeable improvement in the quality of the air.  A year ago a family member brought one to try in a nursing home for another family member. We noticed a difference in the quality of the air.  Recently, we bought 2 for our home.  HOWEVER, on 11/19/13 we paid $40 each.  On 11/28/13 we bought another one for another family member in a nursing home.  The price now is $35 * not a black Friday special and $35 is the price the first family member paid.  Seems like I got taken when I bought 2 at $40.
Rating: 5 stars