• Inclusion Criteria for enrollment are:
• * Over age 18 years
• * Diagnosed with mild to moderate sleep disordered breathing (SDB) (Apnea Hypopnea Index of 5-30)
• Additional Inclusion Criteria for randomization will be:
• * ESS score \>6
• * Total sleep time \<7 hours at least 4 nights per week, based on baseline sleep diary.

Exclusion Criteria:

• * Current use of PAP or oral appliance therapy for SDB
• * Severe respiratory or cardiovascular disease (e.g., ventilatory failure, congestive heart failure)
• * A recent health event that may affect sleep (e.g. recent surgery or hospitalization)
• * Current alcohol or substance use disorder (\<90 days sobriety) or significant unstable psychiatric comorbidity (e.g., suicidal ideation, psychosis)
• * Pregnancy or within 6 months post-partum
• * Commercial drivers and individuals at risk for motor vehicle accidents (MVA) or ESS\>18
• * Significant comorbid sleep disorders (e.g., severe insomnia, narcolepsy); and
• * Central sleep apnea (defined as central apnea/hypopnea index \>5, and \>50% of total AHI).
• * Use of sedative-hypnotic medications higher than the maximal acceptable therapeutic dose range.