I recently bought a RainMate room air- freshener. I have a Rainbow that does the same thing as far as deodorizes, but as for the RainMate , you add water then deodorizer and plug it in. there is no noise, you don't even know it is there.it is small enough to sat anywhere, on the table or in the floor. I turn mine on everday just to freshen the room, when your done just rinse out and dry.rainbow rainmate