Although several brands of CPAP machines are available, only two have full data management capabilities and offer both online monitoring of CPAP data as well as apps for users to monitor their own data. The ResMed S-10 series is an integrated machine that has a built-in water chamber. This make the device compact and quiet. The Philips-Respironics CPAP machine offers a humidifier and water chamber that can be separated from the blower, which makes travel easier if humidification is not required. Buyers should consider which options best fit their CPAP machine needs. If you travel often, consider a travel CPAP device. These are usually not covered by insurance, but are available in an extremely compact housing. Humidification is generally not available without adding a second bulky device. However ResMed has a new recirculation circuit that provides a modest degree of humidity when this is important for the patient.