I purchased this unit due to traces of soot in the family room emanating from the wood heater. Since running the Ionmax ION450 on auto mode, the soot and dust have been significantly reduced. You can hear the unit go to high shortly after a new log is put on the fire. Most of the time the unit runs on low or one up from low.
All in all I am happy I invested in the unit as it has improved the air quality in my living space. The air feels fresher.