What is a passover humidifier?
A passover humidifier is a chamber of water added to the CPAP to help moisten the airflow and reduce irritation to the nasal passages. Air flows from the CPAP, through a short hose to the humidifier, then into the six foot hose to the mask. The air picks up whatever moisture it can as it “passes over” the water in the chamber. Passover humidifiers may provide suffcient moisture with CPAPs set at lower-end pressures, but if not, there is no way to increase the amount of moisture produced. Furthermore, in cold climates, the water temperature in the chamber will drop, causing the CPAP air to become very cold and reduce the amount of moisture.
