Comparison of Nasal Positive End Expiratory Pressure Valve to Dental Device as an Alternative Treatment for Obstructive Sleep Apnea

Inclusion Criteria: * Symptomatic patients confirmed of OSA by sleep study (PSG according to AASM criteria or validated level 3 portable monitoring devices with AHI \> 10/hr) * Not using CPAP for any reasons or patients on dental device but would like to try alternative treatments for OSA. * Able to sign informed consent and use the PEEP nasal valve. * Age between 18-65 years old. * Willing to attend follow up. Exclusion Criteria: * Known nasal problems like deformities or significant rhinitis affecting application of PEEP nasal valve. * Unable to sign consent or use PEEP nasal valve. * Significant or unstable co-morbidities requiring other forms of treatment for OSA as priority. * Coexisting sleep disordered breathing condition other than OSA requiring more complex treatment. E.g. central sleep apnea, significant Cheyne Stokes respiration or hypoventilation syndrome.