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Auto CPAP or APAP Machines. Similar to the CPAP machine, auto adjusting or APAP machines automatically calculate a patientâs required pressure and adjust to a comfortable level without any pre-set programming. These machines are ideal for patients who have various pressures during the night.
1 A BiPAP machine will cost $800-$6000. 2  For example, the ResMed S9 AutoSet APAP is a machine that ensures that sleep disorder patients receive the appropriate therapy and pressure.3  This machine will offer the maximum sleep comfort. 4  This particular machine retails for $800 to $900. Generally speaking, the more features it has the more expensive it will be. 2  Some CPAP machines have a built-in humidifier. 3  CPAP machines have multiple power sources, from battery to plug-in. 4  CPAP machines some with software that allows you to update your machine.