Hello,

My husband was telling me that sometimes his mask blows warm air. Has anyone
had that problem before?


Thanks,
Daffy

Welcome to Apnea Board, daffy.

If the air is warmer than ambient temperature, your husband may be using a heated humidifier. These devices provide warm, moist air to minimize drying and discomfort, especially at high pressures.

If the air seems too warm, you can either adjust the humidity to a lower level, or simply turn off the humidifier. Most folks only need/use them in the winter or other times when overall humidity is low.

Carl

I just picked up my CPAP machine today and in the manual it stated that the airflow from it could be as much as 11 degrees F warmer than the room temp. I believe anything that would make the machine work harder than normal could also cause a rise in temperature, such as a restrictive air filter.

I guess that's your answer.

I would have thought that since moving air feels cooler than still air, it would take more than a 10° raise in temperature from an overworked blower motor to make CPAP output feel significantly warmer than ambient temperature.

Carl

Just place your hand on the XPAP when it's turned off, it's warm to the touch from the electronics inside being on. As the machine flows air, the temp drops slightly.

Another thing besides the fact that it has to do work to make and control pressure is, when you compress a gas (air) the compressed gas gives off heat. (Like a refrigeration cycle) When the compressed gas has it's pressure returned to normal, the opposite happens. (airflow goes cool) That's why it feels cool coming out of the mask, that's also what promotes rainout. Jim