I bought the BreatheSmart 75i thinking it would just be another air purifier. My family and I have been using it for almost a month. At the beginning when the red light turned green I thought it was just propaganda. Now my wife and I can see the difference when we turned them off . In our living room we have a dog and a cat, I've never noticed the dander affecting my breathing, after using the 75i I'm able to breathe better. During the night, we have a second unit in our bedroom, I used to wake up with a dry mouth because my nostrils were always clogged and had to breathe through my mouth. Now, I wake up with a regular mouth, nostrils are no longer clogged. In short, I'm a believer in this product.
Within 4 hours of use the house had clean air. My wife stopped sneezing as she was doing everyday before this was put in. My little dog also stopped coughing and sneezing too. Air quality in the house is much better.
When we cleaned the ash try in the wood stove sensor went to orange and speed accelerated on AUTO to MED. LOW. We don't have a TV, so this was exciting.