The Philips-Respironics System One Heated Humidifier.

System One Humidity Control with Dry Box Technology

The optional System One Heated Humidifier analyzes ambient temperature, changing environmental conditions, relative humidity, and therapy flow to deliver optimum humidity – and ultimate comfort – throughout the night while also dramatically reducing rainout. Dry Box technology isolates the humidfier's water source from the inner workings of the device to protect against accidental spillage and water damage.