Origin Oxygen UnityvsPerry Baromedical Sigma 40-II

Higher pressure enables more clinical protocols. The Perry Baromedical Sigma 40-II reaches 3 ATA, which supports FDA-approved treatment protocols.

A ~2% price difference. At this range, the decision likely comes down to features and certifications rather than cost alone.

FDA clearance matters if you need insurance reimbursement, plan to operate a clinical facility, or want the highest safety assurance. For home wellness use, it's less critical.

This score reflects published studies, certifications, and clinical adoption. Higher scores indicate stronger evidence backing the manufacturer's claims.

A longer warranty reduces long-term ownership risk, especially important for chambers in the $10K+ range.