Not Noticeably Effective At All
This product does NOT noticeably remove not reduce odor/s at all. I had plugged in to a wall of a small guest bathroom where a one cat litterbox was stored. The unit appeared to be working with a slight fan noise and illuminated light.  I had it in the bathroom for a weekend with no detectable change in odor level even after the box was clean.<br /><br />I also moved it to another small bathroom to see if the cat box was too powerful.  I did not notice any difference in the second bathroom at all either.<br /><br />Wish I had read poor reviews prior to buying.  And about the noise level, that's the one thing that didnt bother me at all. I found the noise to be similar to a tiny desk top fan.
Rating: 2 stars