“One week I to using this we awoke to a horrible noise coming from the room it was in. The I it was so loud you could hear it all over my home and it sounded much like a rocket taking off. It also was not very effective in dealing with smells. I purchased this for the room my cat's litter box resides in to help keep the air fresh. I wanted to try something new, but will go back to a filter I've used in the past.”
