As the weather gets colder (and I tend to sleep with my mouth open so I've learned) and the cold air from the machine cools down my teeth to the point that in the morning my teeth ache right down to the bone. (I like to sleep with all the windows open) And the pain can be almost paralyzing.
I saw a Hybernite Rainout Control Heated CPAP Tube System and purchased it not for the rainout as I don't use a humidifier but I just wanted the heated hose, and I just wanted to tell anyone interested that it works wonderfully well. It seems to heat the tube based on the outside temperature. Maybe I'm giving it more credit than it deserves but it seems to me to always be the same temperature no matter how cold the outside air is as it appears to adjust to more heat as the room gets colder.
I only wish I could run it on 12 volt. I have the adaptor of the CPAP unit so when on the sailboat I run it on the batteries but if it's a really cold night I have to come to shore to get 110 volt. Poo..
Anyway just wanted to pass along that it works well and can be found here in the $70 range. Well worth it.