OMG! I Can't say enough positive things about the Conair Medium room air purifier!  This thing is absolutely amazing!  I have used others in the past and they seemed to work ok but this one takes the cake!  it cleans out the air in my open layout home to my amazement!  takes out cooking smells so that when my daughter comes home she doesn't even know I fried something on the stove top! I highly recommend this little but mighty device!  I am going to purchase one for my downstairs living area as well!