It is effective for cleaning the air / feel it ...
It is effective for cleaning the air / feel it has reduced infections.  Use it is room when meeting with others - we have had minimal health issues since faithfully using these units.  Keep one in bathroom all the time we have others in our home.  Also use on train when traveling in a bedroom unit.  Only drawback might be a little hum in the motor but we feel it is minimal.
Rating: 5 stars