Loud but Works
It's loud to me but I am more sensitive than most to noise. I hate most white noise to the extent I'd rather be slightly too warm than run a fan in my bedroom. I am using it in my den next to the cat litter box. It took a few days of running but I then noticed a appreciable decrease in the odor from that area. Now that it has been on a few weeks I consider it a good purchase for that location. I would never be able to use it in a room I am regularly in.
Rating: 4 stars