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An EPAP device uses a nasal device to generate pressure while exhaling, keeping your airways open and promoting normal breathing during sleep. It’s a simple, battery-free solution that doesn’t require electricity and seals the nostrils to prevent airway closure. 

Source : Edwards M. EPAP therapy as a CPAP alternative. SleepApnea.org. September 22, 2023. Accessed September 3, 2025. https://www.sleepapnea.org/cpap/epap-therapy/?srsltid=AfmBOoor1zpHeOYxZTBUu7-Kn1yRrW5AQRpw10kHfN6CCxSSYgePwtKd.  

EPAP: A small, lightweight device that fits over or in your nostrils and uses your exhaled breath to create pressure, helping to maintain airway openness. 

CPAP: A machine that requires a mask and uses electricity to push air into your airway to keep it open. 

EPAP is designed to work with your natural breathing patterns, while CPAP requires external airflow. 

Source: Summer JV. EPAP therapy as a CPAP alternative. Sleep Foundation. July 10, 2025. Accessed September 3, 2025. https://www.sleepfoundation.org/cpap/epap-therapy.   

EPAP relies on nasal air pressure to keep the airway open. It is more suitable for nose breathers, as it creates pressure when exhaling through the nostrils. If you typically breathe through your mouth while sleeping, EPAP may not provide optimal results.