Neither here nor there
This didn't help the odor near a litter box in a small 10x12ft room.  It ran 24/7 for several weeks before I decided it wasn't helping anything.  The air intake holes do become clogged with dust requiring the unit to be cleaned periodically.  The plug swivels so the unit can be used sideways if necessary, but it was difficult to rotate. The noise and light will be bothersome if you're the sensitive type.  As to it reducing mold spores or eliminating viruses? Who knows without air quality testing.
Rating: 3 stars