Oxygen Ark Ark H1vsPerry Baromedical Sigma 34

Higher pressure enables more clinical protocols. The Perry Baromedical Sigma 34 reaches 3 ATA, which supports FDA-approved treatment protocols.

A significant price gap of ~70%. Consider whether the higher-priced unit's additional features justify the investment for your use case.

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.