Sleep Apnea Support Group
Sleep apnea is a common sleep disorder characterized by brief interruptions of breathing during sleep. People with sleep apnea partially awaken as they struggle to breathe, but in the morning they may not be aware of sleep disturbances.
if you mouth breathe you need one
IMO humidifiers are oversold
I live in the southwest US in a very dry climate AND my heating is natural gas which further dries out the air. I use my humidifier year round raising it to a setting of 4 in the winter and 2 or 3 in the summer.