A:Answer It's loud if you ask me. I wouldn't turn on during sleep. I'd turn on during wake time to get rid of the smell (cooking, cigarette etc) but would turn it off after smell is gone. It's not automatic either so it's totally manually operated, would have to turn on and off by hand. Little inconvenient if you ask me. For price of $79.99 compared to $100 over prices for other ones we chose this one. It's okay for now.
