(11-19-2015, 03:42 PM)Possum Wrote: Thermodynamically, it makes more sense that the heated hose probably helps the flowing air not to cool significantly on its way to the mask, but I seriously doubt it actively "warms" the air much. First of all, air is an extremely poor conductor of heat. Second, the molecules that make up air are flowing through the tube so quickly (60 L/min or so) that they don't have much time (1-2 secs) to be heated via conduction during the short time they are traveling through the tube. In the case here, he needs the air to be heated completely by the tube, not the humidifier. So, I would not expect very good results.
Exactly... And well said.
Remember the OP situation has no humidifier.