The HC150 respiratory humidifier is used to warm and humidify gases delivered to patients requiring continuous positive airway pressure (CPAP) therapy or Use the HC150 only for its intended use as described in this manual. Use only accessories recommended by Fisher & Paykel Healthcare. The HC150 Heated Respiratory Humidifier is designed for home use with a CPAP or mask ventilator system prescribed by a physician. The HC150 features Ambient The HC150 Heated Respiratory Humidifier is designed for home use with a CPAP or mask ventilator system prescribed by a physician. The HC150 features Ambient Technical Manual for HC100 Respiratory Humidifier. Fisher & Paykel Healthcare have a policy of continued product improvement and reserve the right to alter