Chamber Comparison
AHA AHA Flex 20 V2vsPerry Baromedical Sigma 34
AHA
AHA Flex 20 V2
2
ATA
$20K
Starting
2yr
Warranty
Perry Baromedical
Sigma 34
3
ATA
$50K
Starting
1yr
Warranty
The Bottom Line
The AHA AHA Flex 20 V2 wins on price, warranty, and weight, while the Perry Baromedical Sigma 34 takes the edge in max pressure and clinical credibility. If price is your priority, the AHA AHA Flex 20 V2 is the stronger pick.
Key Differences
AHA
2 ATA
Perry Baromedical
3 ATA
Higher pressure enables more clinical protocols. The Perry Baromedical Sigma 34 reaches 3 ATA, which supports FDA-approved treatment protocols.
AHA
$20,000 - $28,000 (estimated)
Perry Baromedical
$50,000 - $90,000
A significant price gap of ~60%. Consider whether the higher-priced unit's additional features justify the investment for your use case.
AHA
7/10
Perry Baromedical
9/10
This score reflects published studies, certifications, and clinical adoption. Higher scores indicate stronger evidence backing the manufacturer's claims.
AHA
2 years
Perry Baromedical
1 year
A longer warranty reduces long-term ownership risk, especially important for chambers in the $10K+ range.
AHA
soft-shell
Perry Baromedical
hard-shell monoplace
Hard-shell chambers generally offer higher pressures and more clinical features, while soft-shell chambers are more portable and affordable.
Who Should Buy Which?
Best for
AHA AHA Flex 20 V2
US market clinics, FDA-compliance-focused buyers, medical practitioners
View full details →Best for
Perry Baromedical Sigma 34
Hospitals, wound care centers, clinical HBOT programs
View full details →Full Specification Comparison
| Specification | AHA AHA Flex 20 V2 | Perry Baromedical Sigma 34 |
|---|---|---|
| Chamber Type | Soft-Shell | Hard-Shell Monoplace |
| Performance Tier | Clinical Grade | Clinical Grade |
| Max Pressure | 2 ATA | 3 ATA★ |
| Oxygen Delivery | mask/cannula | 100%-medical-grade |
| O₂ Concentration | Up to 95% via concentrator | 100% via BIBS with Duke hoods |
| Capacity | 1-person | 1-person |
| Weight | 88 lbs★ | 2,200 lbs |
| Interior Dimensions | 85cm diameter x 250cm length | 33.5in diameter |
| Portability | portable | fixed-installation |
| FDA Cleared | Yes (#K101262) | Yes (#Multiple 510(k)s) |
| CE Marked | Yes | Yes |
| Made In | Austria/Slovenia | United States |
| Price | $20,000 - $28,000 (estimated)★ | $50,000 - $90,000 |
| Warranty | 2 years★ | 1 year |
| Clinical Score | 7/10 | 9/10★ |
| Brand Established | 2006 | 1956 |
| Climate Control | No | Yes★ |
| Communication System | No | Yes★ |
| Emergency Features | Safety valves, internal pressure relief | Emergency depressurization, fire suppression, BIBS system, multiple safety interlocks |
AHA AHA Flex 20 V2 — Standout Features
Perry Baromedical Sigma 34 — Standout Features
Interested in either chamber?
Request quotes from both manufacturers and compare real pricing.
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