Recognition 1-154 for PVHO-1-2019 is superseded by 1-181 for PVHO-1-2023, with a declaration-of-conformity cutoff of 26 December 2026.
The dated statement
The FDA Recognized Consensus Standards entry for ASME PVHO-1-2019, recognition number 1-154, carries a transition period notice. Verbatim: “FDA recognition of ASME PVHO-1-2019 [Rec# 1-154] will be superseded by recognition of ASME PVHO-1-2023 [Rec# 1-181]. FDA will accept declarations of conformity, in support of premarket submissions, to [Rec# 1-154] until December 26, 2026. After this transition period, declarations of conformity to [Rec# 1-154] will not be accepted.” The same entry records FR Recognition List Number 059 and a date of entry of 12/19/2022.
| Standard | Recognition number | Status |
|---|---|---|
| ASME PVHO-1-2019 | 1-154 | Declarations of conformity accepted until 26 December 2026 |
| ASME PVHO-1-2023 | 1-181 | Supersedes 1-154 |
| NFPA 99:2021 | 1-153 | Listed |
| NFPA 99:2024 | 1-180 | Listed |
What this is not
This is a rule about paperwork in premarket submissions. It is not a recall, not a safety notice, and not a statement that a chamber built to the 2019 edition becomes non-compliant on 27 December 2026. We did not find, and are not asserting, any FDA statement about chambers already in service. Nothing on the classification page for product code CBF says which edition any particular chamber was declared against, and neither do we.
Why a spec table cares
Several manufacturers state ASME PVHO-1 conformity on their product pages without naming an edition, which our comparison notes already flag. An undated “meets PVHO-1” claim now spans two editions, one of which is on a declaration cutoff. That is a question to put to the manufacturer, not a figure we can transcribe.
What it means if you are buying
If you are buying a new-build chamber that will be submitted or supplied after December 2026, ask which edition of PVHO-1 the declaration of conformity names.
How this was verified
Both FDA pages were fetched with caching disabled on 31 August 2026 and the transition wording above was copied from the 1-154 detail sheet. The product classification page for code CBF was read the same day and listed all four recognitions in the table above.
Sources
- FDA Recognized Consensus Standards — ASME PVHO-1-2019, recognition 1-154Source read on 31 August 2026 · Transition period wording quoted verbatim above.
- FDA Recognized Consensus Standards — ASME PVHO-1-2023, recognition 1-181Source read on 31 August 2026 · The superseding recognition.
- FDA Product Classification — product code CBF, chamber, hyperbaric, 21 CFR 868.5470Source read on 31 August 2026 · Lists recognitions 1-153, 1-154, 1-180 and 1-181 for this product code.
- ASME — PVHO-1-2023, Safety Standard for Pressure Vessels for Human OccupancySource read on 31 August 2026 · Publication record for the superseding edition.