Soft-Shell Versus Hard-Shell Hyperbaric Chambers
Build type decides installation, duty cycle and resale far more than pressure does. Here is how the two families actually differ.
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The short version
A soft-shell chamber is a high-strength TPU envelope with a reinforced nylon cover, sealed with a zipper system and held in shape by an internal frame, an external frame or inflatable air columns. A hard-shell chamber is a rigid body - aluminium alloy, aerospace aluminium profile or stainless steel - with a door and, usually, automatic pressure control.
The common assumption is that soft means low pressure and hard means high pressure. That is not true in this range: the soft-shell OTS20 delivers a true 2.0 ATA and the hard-shell OHD15 is rated up to 1.5 ATA.
Where the real differences are
| Soft shell | Hard shell | |
|---|---|---|
| Installation | Arrives folded, passes a standard door, no foundation | Fixed placement; access route and floor loading must be checked |
| Weight | OTL19 chamber approximately 45 kg | OHL body approximately 100 kg; OHS Series 330-380 kg |
| Sealing | Reinforced or triple zipper system | Mechanical door with automatic and manual locking |
| Pressure control | Manual on entry models, automatic on the OTL19 | Automatic on the OHE20 and OHL Series |
| Relocation | Folds and stores; the OTSA15 deflates | Not intended for frequent relocation |
| Interior | Folding chair or mattress | Electric seating, warm LED lighting, upholstery on the OHS Series |
| Typical setting | Home, studio, travelling teams | Clinics, hotels, high-utilisation rooms |
Duty cycle is the deciding factor
A chamber used once a day by one household and a chamber used eight times a day by paying clients are different machines. Zippers, soft windows and manual valves are perfectly adequate for the first and wear noticeably under the second. If the chamber is a revenue line, the rigid body and automatic control usually pay for themselves in operator time alone.
What soft shell buys you
Three things: the unit gets into rooms rigid chambers cannot reach, it can be moved when the room changes use, and the landed cost is lower because it weighs less. For a distributor, that last point decides whether a demonstration unit can be air-freighted.
What hard shell buys you
Repeatability and presentation. One-touch pressurisation removes operator variance between sessions, dual electronic and mechanical safety layers cover continuous operation, and a finished cabin with electric seating reads as clinical equipment in a client-facing room.
The middle option
The OTL19 is worth a look if the decision is close. It is a soft-shell chamber with fully automatic pressure control from 1.1 to 1.9 ATA, a reinforced external support frame and a protective cover - most of the operating behaviour of a rigid cabin, in a 45 kg envelope.
Buyer questions
Questions On This Topic
Is a soft-shell chamber less safe?
Both families ship with layered pressure protection - automatic relief, manual release and internal gauges - and every unit is pressure-tested before dispatch. The difference is duty cycle and wear behaviour, not a different safety concept.
Which holds its value better?
Rigid chambers generally hold resale value better because they are capital equipment with a longer service expectation. No resale figures are published, so treat this as general market behaviour rather than a guarantee.
Can a soft-shell chamber be left inflated permanently?
It is designed to be pressurised for sessions and depressurised afterwards. Storage and daily-use guidance is supplied with the chamber and over WhatsApp.
Chambers Mentioned In This Guide
OTS15 Spacious Sitting Chamber
Spacious upright sitting chamber at 1.5 ATA with panoramic windows and room to read, work or relax.
Specs and quote
OHE20 Hard-Shell Sitting Chamber
Premium stainless-steel 2.0 ATA sitting chamber with intelligent automatic pressure control and a zero-gravity cabin.
Specs and quote
OTL19 Premium Soft Lying Chamber
Premium soft-shell chamber reaching 1.9 ATA (13 PSI) with automatic pressure control and an external frame.
Specs and quote
OHL15 / OHL19 Hard-Shell Lying Chamber
Premium lie-flat hard-shell chamber in a lightweight aluminum-alloy body, available in 1.5 or 1.9 ATA.
Specs and quoteKeep Reading
ATA Pressure Explained For Hyperbaric Chamber Buyers
What 1.3, 1.5, 1.9 and 2.0 ATA mean in practice, and how to pick the pressure band before you shortlist a chamber.
Chamber Room Checklist Before You Place The Order
Door widths, lift dimensions, floor loading and power - the checks that decide whether a chamber can be installed at all.
Talk to the factory
Ask The Factory Directly
If this guide did not answer your question, send it over WhatsApp. Technical questions reach the engineering team, not a call centre.
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