Surprisingly high quality unit
The Germ Guardian Purifier is a compact wall unit that fits into an AC outlet.  It can be rotated 90 degrees if it fits the area better.  It has a fan that pulls the air in and circulates over the UV-C bulb with a relatively quiet noise level that's about the same as a computer fan.  In fact it provides a nice level of white noise.  The unit has a pleasing blue light that lets you know it's on and could also service as a night light.  As far as effectiveness, I believe is effective for a standard room or hallway.  The air seems to have a neutral smell and I do not notice any ozone.  I ordered two and having used them for a few days, I ordered two more along with replacement bulbs since a bulb will typically last about 5000 hours before it loses its effectiveness.  I recommend this product for disinfection of air and deodorizing.
Rating: 5 stars