The Fisher & Paykel HC150 stand-alone Heated Humidifier adds heated humidification to standard CPAP therapy, maintaining hydration and preventing discomfort. During the night, room temperatures often drop. When this occurs, humidification users commonly notice condensation and water droplets forming in the tubing. Many find the associated gurgling noise irritating and are often forced to drain the tubing during the night. To overcome this, Fisher & Paykel Healthcare has developed the HC150 Humidifier with a unique feature - Ambient Tracking.