Hard Shell vs Soft Shell Hyperbaric Chambers: 2026 Comparison

Carbon Wellness sells both soft and hard shell chambers. This guide explains how they differ and where each type may be the better or worse choice.

Soft Shell vs Hard Shell at a Glance

Prices are from the current Carbon Wellness lineup and include the concentrator.

What Is a Soft Shell Hyperbaric Chamber?

A soft shell chamber is an inflatable tube or capsule made from airtight, flexible material.

A compressor pumps filtered air into the chamber until it reaches the selected pressure, usually 1.3, 1.4, or 1.5 ATA. Most home setups also use an oxygen concentrator that feeds concentrated oxygen to a mask inside the chamber.

You enter through dual zippers, while an internal frame keeps the chamber's shape once it is inflated.

Lying models are available in 32, 36, and 40-inch diameters. Sitting and wheelchair-accessible models are also available, including the Forward90 and Heal40.

What Makes a Chamber Hard Shell?

A hard shell chamber is a rigid steel vessel with a sealed door and viewing windows.

Because the walls do not flex, hard shell chambers can safely operate at higher pressures. The home models most buyers consider can reach up to 2.0 ATA.

Instead of climbing through a zipper, you enter through a door. Models such as the Quest30 include controls inside and outside the chamber, a two-way intercom, and a digital pressure display.

The Space60 is designed around a full-size recliner, allowing you to sit upright or recline during a session.

Pressure: The Difference That Matters Most

Pressure is measured in ATA, or atmospheres absolute. At sea level, normal atmospheric pressure is 1.0 ATA.

Here is how common chamber pressures compare with diving depths:

• 1.3 ATA: about 10 feet underwater
• 1.5 ATA: about 16 feet underwater
• 2.0 ATA: about 33 feet underwater

Higher pressure allows your blood to carry more dissolved oxygen. When you combine increased pressure with concentrated oxygen, the oxygen pressure inside the chamber rises significantly compared with breathing normal air at sea level.

At 1.3 ATA while breathing 90 to 97% oxygen, the oxygen pressure is roughly six times that of normal air. At 2.0 ATA, it rises to roughly nine times.

That is the key reason a hard shell chamber can be a significantly different experience from a mild-pressure soft shell chamber. The oxygen source can be similar, but the higher operating pressure is what creates the larger difference between the two.

Do Soft Shell Chambers Work?

The answer depends on what you expect from the chamber.

In the United States, soft shell chambers with FDA clearance are cleared for acute mountain sickness. Other uses may fall into the wellness category rather than established medical treatments.

The research on mild-pressure chambers is also more limited than the research on traditional clinical HBOT. Many published hyperbaric studies use pressures of 2.0 ATA or higher with near-100% oxygen.

The Undersea and Hyperbaric Medical Society (UHMS) defines hyperbaric oxygen therapy as near-100% oxygen at a pressure of at least 1.4 ATA. That means a 1.3 ATA session does not meet that definition.

Studies involving mild pressures are generally smaller, and results are mixed. Many owners use soft shell chambers for recovery, relaxation, and general wellness, but personal reports are not the same as clinical evidence.

If you need hyperbaric treatment for a medical condition, a home soft shell chamber should not be considered a replacement for medically supervised clinical HBOT.

Which Is Cheaper to Own?

Soft shell chambers are considerably cheaper upfront.

The current Carbon Wellness soft shell lineup ranges from $7,499 for the Elite32 to $10,999 for the Heal40. Hard shell models range from $27,999 for the Quest30 to $48,999 for the Space60 Pro.

That makes the initial price difference substantial.

Ongoing operating costs are closer. Both types can use the same general type of oxygen concentrator, filters, and electricity. Soft shell chambers do have zippers and seals that can experience wear over time, while rigid steel chambers have fewer flexible components exposed to repeated use.

For a full breakdown of purchase prices, financing, and what's included, see our pricing and financing details.

If you want to try a chamber before committing to a purchase, you can also rent a chamber first.

Space, Setup, and Daily Use

Soft Shell Chambers

A soft shell chamber generally takes up about the footprint of a single bed, plus additional room for the compressor and oxygen concentrator.

One major advantage is that the chamber can be deflated for moving or storage. The soft shell chambers we carry operate at 50 dB or less, which is around the volume of a quiet conversation.

That makes them easier to fit into a spare bedroom, home gym, or other space that needs to serve multiple purposes.

Hard Shell Chambers

A hard shell chamber needs a more permanent location.

Steel chambers are heavy, arrive by freight, and generally should not be moved after installation. Before delivery, you should confirm that the room has the required floor strength and power capacity.

Getting In and Out

This is another area where the two designs feel very different.

Soft shell chambers use zippers, which can take some time to open and close and may be awkward for people with limited mobility.

Hard shell chambers use a door, making entry and exit easier for many users.

If you are tall or broad, a 36- or 40-inch soft shell chamber or a sitting model can provide more interior space.

Safety Basics for Both Types

Both soft and hard shell chambers pressurize your body, so many of the same basic safety considerations apply to both.

• Take care of your ears. Ear discomfort caused by pressure changes is one of the most commonly reported side effects of hyperbaric sessions. Learning how to equalize your ears is important, similar to what you do during an airplane flight.
• Take fire safety seriously. Do not bring electronics, lotions, or flammable items into the chamber. Keep the oxygen concentrator outside the chamber in a properly ventilated location.
• Talk to your doctor when appropriate. This is especially important if you have lung disease, recently had ear or sinus surgery, have a seizure disorder, or are pregnant.
• Follow the manufacturer's instructions. The FDA has received reports of serious injuries involving hyperbaric devices and recommends following the instructions provided with each device.

Higher pressure can place more stress on the ears and may require a longer pressurization period. Adjustable hard shell chambers allow users to select different pressure levels, so users can start at a lower setting and work up as appropriate.

Soft Shell or Hard Shell: Which Should You Choose?

There is no single best chamber for everyone. The right choice depends on how you plan to use it, how much space you have, and how much pressure you want.

Choose a Soft Shell Chamber If:

• Your budget is under $11,000
• You want mild pressure between 1.3 and 1.5 ATA
• You want to move or store the chamber when it is not in use
• You have limited space
• This is your first chamber and you want a lower-cost way to start using one at home

Choose a Hard Shell Chamber If:

• You specifically want 2.0 ATA
• You plan to use the chamber regularly for years
• You prefer a door over a zipper
• You want larger windows or a recliner-style setup
• You are equipping a clinic or professional practice

Common Mix-Ups About Soft and Hard Shell Chambers

"Hard shell means 100% oxygen."
Not necessarily. For home use, both chamber types can use an oxygen concentrator delivering 90 to 97% oxygen through a mask. The major difference is the chamber's operating pressure.

"Soft shell chambers are toys."
They still pressurize your body and carry real safety considerations. Soft shell chambers should be used according to the manufacturer's instructions, just like hard shell chambers.

"Higher pressure is always better."
Higher pressure is not automatically better for every user or every goal. More pressure can also mean more stress on the ears and sinuses. The appropriate pressure depends on the intended use and should be discussed with a medical professional when treatment for a medical condition is involved.

FAQ

Is a soft shell session the same as clinical HBOT?

No. Clinical HBOT commonly operates at higher pressures, often around 2.0 to 3.0 ATA, with near-100% oxygen under medical supervision.

A typical home soft shell chamber operates at 1.3 to 1.5 ATA and uses concentrated oxygen from an oxygen concentrator. That is a milder exposure than traditional clinical HBOT.

Is a hard shell chamber worth the extra cost?

It can be, especially if you specifically want 2.0 ATA, expect heavy long-term use, or prefer the easier entry provided by a door.

If mild pressure fits your goals, a soft shell chamber offers a much lower upfront cost.

Which type is better for claustrophobia?

Hard shell chambers can feel more open because of their doors, larger windows, and roomier designs. The Space60, for example, is designed around a recliner.

If a hard shell chamber is outside your budget, a soft sitting model such as the Forward90 provides an alternative with four large windows and an upright seating position.

Can I sit up in either type?

Yes, if you choose a sitting model.

The Forward90 is a soft sitting chamber, while the Space60 is a hard sitting chamber designed with a recliner.

Final Takeaway

The right chamber is the one that fits your goals, space, budget, and intended frequency of use.

Soft shell chambers are the more affordable and flexible option, especially for home users who want mild pressure and the ability to move or store the chamber.

Hard shell chambers cost considerably more, but they offer higher pressure, easier entry, and a more permanent setup for users who plan to make hyperbaric sessions part of their long-term routine.

If you're still unsure, our team can help you compare the available chamber types, pricing, financing, and delivery options.