The goal of this clinical trial is to test the automatic positive airway pressure (APAP) function of the RXiBreeze PAP System in adult subjects with obstructive sleep apnea (OSA). The main questions the study aims to answer are:
1. Is apnea-hypopnea index (AHI) detection using the RXiBreeze PAP System equivalent to apnea-hypopnea index (AHI) detection using PSG?
2. What is the responder rate using the RXiBreeze PAP System?
Participants will use the APAP function of the RXiBreeze PAP System while undergoing polysomnography (PSG) for two separate nights in a sleep center. During each visit, participants will also complete two patient reported outcome questionnaires:
* Epworth Sleepiness Score (ESS); and
* Functional Outcomes of Sleep Questionnaire (FOSQ) short form.