FINK FESL-322 (Duo): 2-seat hyperbaric chamber
Two seated places for shared, supervised sessions. Medical oxygen by mask at up to 2.0 ATA.
Updated 5 November 2026 · HBO₂ Health
Two seated places for shared sessions
The FINK FESL-322 (Duo) accommodates two people in the same session, each breathing medical oxygen through a separate mask. Both occupants share the chamber pressure, so their prescribed pressures need to be compatible.
A doctor decides the treatment for each person. For a clinic or home installation, discuss which appointments can be shared and how often both places are likely to be used. A two-seat chamber does not mean that both occupants need the same treatment course.
Plan around paired appointments
A small clinic should consider which appointments can be paired and which will leave one place empty. Two seats offer capacity for two people, but a session with one occupant still requires an operator and an oxygen plan. Compare the expected use of both places with the simpler scheduling of the Solo and the additional places in the Trio.
For a home installation, discuss who will attend together and how the operator will be available for those appointments. The Duo is operated by a trained person. Its occupants do not run their own session. The equipment purchase and each person’s medical arrangements need to be settled separately.
Allow for the wider vessel
The Duo is 2.67 m wide, compared with 2.0 m for the Solo. Its external depth is 2.3 m, its height is 2.2 m and its listed weight is 2,000 kg. See FINK’s Duo specifications. Check the complete room plan and structural loading before deciding that a space can accommodate it.
The cabin is pressurised with air and each occupant breathes medical oxygen through a personal mask. Agree cylinder supply, storage and reserve arrangements for the two-seat configuration. The single-seat replenishment estimate should not be used as a delivery schedule for this model. Ask for the oxygen plan to accompany the room layout and quotation, so both the physical installation and the recurring responsibilities are clear.
Specifications
| Seats | 2 |
|---|---|
| External dimensions (W × D × H) | 2.67 × 2.3 × 2.2 m |
| Weight | 2,000 kg |
- Treatment: 100% medical oxygen by mask, at up to 2.0 ATA
- Chamber rating: 2.8 ATA operating, 3.0 ATA design, to ASME PVHO-1 2023
- Door: sliding, 700 × 1,416 mm
- Safety: fire deluge system, UPS backup power, emergency depressurisation inside and outside
- Oxygen: cylinder manifold with automatic changeover
- Windows: two 695 mm viewports
The chamber is rated above the treatment pressure. That margin is part of the code, not a treatment setting. Your doctor sets the pressure for each session.
Plan the room and oxygen supply
The installation plan needs suitable ventilation and space for the operator, supporting equipment and servicing. Modular sections are assembled in the room, with the actual delivery route checked before ordering.
The cabin is pressurised with air. Medical oxygen reaches each person through a separate mask, supplied by a cylinder manifold with automatic changeover. A trained operator runs every session. The occupant does not self-operate.
Is this FESL model FDA cleared?
Yes. The one- to four-seat FESL chambers (FESL-310, 322, 323 and 324) are supplied under FINK's FDA 510(k) clearance K240569, granted on 21 November 2024, as prescription medical devices for the 13 conditions listed in the clearance. The FDA summary describes FINK's chamber family by compartment rather than by seat count, which is why it mentions capacities of four to 28. We send the clearance letter with every proposal.
What does the project cost?
Most seated FESL projects come in between USD 300,000 and 600,000 installed. Where yours lands depends on the number of seats and the fit-out. The written quote for your site sets the final figure, including delivery, import and any building work.
Request the model price and a quotation for your site. What to include in the quotation.
Planning a Duo installation?
Tell us where the chamber will go and how you plan to use it. We will work through the Duo's room requirements and oxygen supply with you, along with an initial project budget. The final scope and price are confirmed in a written quotation for your site.