What does non-servo controlled heating humidifier mean?

The servo-less heated humidifier is a medical device mainly used to humidify and heat the respiratory system to help improve the patient's breathing experience.

Specifically, a servo-less heated humidifier is a device that provides a comfortable breathing experience by heating and humidifying air. It usually consists of a heating element and a humidifier that heats and humidifies dry air to make it more suitable for the patient's breathing needs.