Note: This unit will only work with the Philips Respironics System One (PR1) 50 Series of CPAP and BiPAP machines. Verify the Ref number on the machine label consists of the "50" i.e. "450P" for example. No heated tube capability.
Models:
- DS150
- DS250
- DS450
- DS550
- DS750
This humidifier will not work with the PR1 60 Series models.
