I live in a very dry State during the winter we have cold dry winds with little or no moisture so when the furnace comes on it even sucks out what moistures left and that's why this humidifier is so perfect for me I have very bad dry sinus headaches. I would take meds for it which I did not like taking because of the high blood pressure issue, this machine really helped with my dry sinuses and my dry eyes. I would highly recommend this for anybody that has these types of problems