Non-Inferiority Trial of Acute HFT Versus nCPAP

Inclusion Criteria: * At least 18 years of age * Previous diagnosis of primarily obstructive mild-moderate Sleep Disordered Breathing during in-laboratory polysomnography * Ability to read and understand English Language * Ability to provide informed consent Exclusion Criteria: * Unstable medical illness within the last month (30 days) * Acute / recent upper airway infection * Prior use of non-continuous positive airway pressure medical technology therapies prescribed by a physician for the management of obstructive sleep disordered breathing (e.g., Provent®, Winx™, mandibular advancement oral appliances, etc.) * Prior use or exposure to CPAP / Bi-Level / or other non-invasive ventilatory modalities * Craniofacial or other anatomical anomalies that may predispose patients to upper airway obstruction, or obvious blockage to nasal air flow * Patients using opioids or amphetamines will be excluded from the study. * Enhanced oxygen requirement (i.e., FiO2\>0.21) * Patients requiring Bi-Level therapy upon CPAP titration attempt * Surgery since the diagnostic PSG * Significant recent sedative/hypnotic use likely, in the opinion of the principle investigator, to impair ventilatory control or impact the subsequent titration of either CPAP therapy or Flowrest therapy (including benzodiazepines, antihistamines, imidazopyridines) * Significant use of stimulant medications likely, in the opinion of the principle investigator, likely to alter ventilatory or upper airway control and imp…