ResMed introduces the H5i humidifier with the S9 series machines. The humidifier will measure the room temperature and humidity and adjust your humidification accordingly, giving you partial climate control. For full climate control operation, add ResMed's ClimateLine Tubing which will also measure temperature and humidity at the mask for climate control throughout your whole circuit.
The H5i comes with a disposable water tub that should be changed every 2 to 6 months. You can purchase the optional cleanable water tub for repeated use.