8. Humidifier. The humidifier is part of the PAP device that is used to add moisture to the pressurized air, using water vapor. Some more advanced humidifiers are heated and use warm water. This process is used to reduce nasal congestion, and prevent dry nose and mouth.
9. Rainout. This is a term used to describe condensation that collects within the CPAP tubing and mask. It happens when the warm, humidified air from the CPAP machine hits the colder room temperature air and cools down. What happens then is a simple physics, now cooler air cannot hold as much moisture as the initially warm air, which further causes the water in the humidified air to form water droplets. Rainout can be prevented using heated tubing.
10. Tubing, Heated Tubing. Hoses that are used to deliver pressurized air from the PAP machine to your face mask are usually called tubing. More advanced tubes can be heated, to prevent “rainout” and make breathing pressurized air less uncomfortable.
11. CPAP Mask, Headgear. A CPAP mask is used to deliver pressurized air from the CPAP machine, via tubing, to your airways. There are several types of CPAP face masks:
Full face mask. Self-explanatory, full face mask covers full or most of the face. It covers both the mouth and nose at the same time. This is the most common CPAP mask as it fits all types of "breathers".
Nasal mask. Unlike the full face mask, this mask is significantly smaller and covers only the nose. Choice number one for “nose breathers”, this mask allows them much more mobility during sleep. Since it is more comfortable, recently it is gaining popularity with all types of breathers as it is used in combination with the chin strap which keeps the mouth closed during sleep.
Nasal pillow mask. The smallest of the 3 types, the nasal pillow mask is an upgraded solution to the nasal mask. This mask does not cover any part of the face, but instead, it sits right under the nose and uses silicone pads that fit just inside the nostrils.
Total face mask – covers the full face from chin to forehead, covering the whole face. These masks might be prescribed in the case of patients with facial irregularities when a proper mask seal cannot be obtained.
Oral masks – opposite to nasal masks, oral masks cover only the mouth. These are usually used when users have deviated septum or any similar issue with nose breathing, and for some reason cannot tolerate the full face mask, or simply find this mask as the better alternative due to its minimalistic design.
Hybrid masks – as suggested by its name, a hybrid mask is the combination (hybrid) of two mask types (most often combining the full face mask and nasal pillow mask, or even oral and nasal pillow mask).
Headgear. This is the part of the face mask, the elastic straps that hold the mask onto your head.