Humidifiers increase the humidity in the air they emit. Comes with a water bottle There is a heating tray to warm the water. Because the air released is stronger than we normally breathe. As a result, the nose or throat can be dry. As for the temperature control tube or heated tube, it is a special tube that has a heating system around the tube, preventing water droplets from condensation remaining in the tube. If using a conventional pipe, there is often a large amount of water droplets. and can flow into the mask and into our nose If using a CPAP machine and using a complete set of humidifiers and heat pipes like this The patient will be most comfortable.