This works well for a small space and kitty litter boxes
I love this small purifier.  I use it under an enclosed staircase where I keep my litter boxes.  The first one I ordered only lasted for 6 months, the fan went out, but it is under warranty for 1 year.  The company sent me a new unit and it works great.  Some reviews said that it was noisy.  It is at first, especially if you do not have it in an upright position.  I think it just needs to work for a bit and then the noise abates.  I really missed it during the week it took to get the replacement.  I highly recommend the unit for a small area.
Rating: 5 stars