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How it works

How hyperbaric oxygen works.

What a chamber actually does, what happens in a session and how to choose the right one. Plain English, no hype.

The science

What a chamber actually does.

Two things happen at once: the air pressure around you rises, and you breathe concentrated oxygen. Together, they let your blood carry far more oxygen than breathing normal air.

  1. 1

    The pressure goes up

    The chamber seals and fills with air until it reaches its set pressure, usually 1.3 to 2.0 ATA. At 2.0 ATA you're at the same pressure as a diver 10 metres underwater.

  2. 2

    You breathe concentrated oxygen

    An oxygen concentrator supplies around 90 to 93% oxygen through a mask or headset. Normal air is 21% oxygen.

  3. 3

    More oxygen dissolves into your plasma

    Normally almost all the oxygen in your blood rides on red blood cells. Under pressure, extra oxygen dissolves straight into the plasma, the fluid part of your blood. This is Henry's law.

  4. 4

    It travels wherever your blood goes

    Plasma flows through even the smallest blood vessels, carrying that extra oxygen through your body.

More pressure, more oxygen

Oxygen pressure you breathe, compared with normal air at sea level. Drag the slider or hover the chart.

Chamber pressure1.5 ATA
Like being underwater at5 m
Oxygen pressure vs normal air6.6×
Breathing ~93% oxygen in the chamberBreathing normal air

Physics illustration: oxygen partial pressure = pressure × oxygen fraction (air 21%, mask oxygen ~93%). Dissolved oxygen in plasma rises with partial pressure (Henry’s law). Not a measure of health outcomes.

Your session

What happens in a session.

Every session follows the same simple shape. You're in control the whole time, with controls inside the chamber.

Pressure during a session

Example 60-minute session. Times and pressure vary by chamber and program.

  1. Before you start

    Settle in

    Get comfortable lying down or seated, close the chamber and fit your oxygen mask or headset. Loose cotton clothing is best.

  2. 0–8 min

    Pressurise

    Pressure builds gradually. Your ears feel full, like a plane coming in to land. Swallow, yawn or gently blow with your nose pinched to equalise.

  3. 8–52 min

    Breathe and relax

    Breathe normally through your mask. Read, listen to music, watch TV in the seated hard shells, or simply rest.

  4. 52–60 min

    Return to normal

    Pressure comes down slowly and your ears adjust again. Once it's back to normal, open the chamber and step out.

What our UK clients report.

Self-reported results from clients of our UK sister company, Oxydise, after a course of hyperbaric sessions.

Deep & REM · h

91%

Better sleep

Deep & REM sleep per night: up steeply, then held

Average nightly deep and REM sleep reported across a course of 60 sessions. Most of the change came in the first 20 sessions.

Energy · 1–10

88%

More energy

Self-rated daily energy, 1–10

Clients rated their daily energy on a 1–10 scale. The average rose from 4 to 8 by session 60.

Good days · /wk

87%

Better overall wellbeing

Days a week feeling good

Sessions 1–7

2/7

Sessions 54–60

6/7

Good days per week went from about 2 in the first week of sessions to about 6 by the final week.

Pain · 0–10

82%

Pain reduction

Self-rated pain, 0–10

Self-rated pain on a 0–10 scale fell on average from 6 to 3 over the course.

Readiness · 0–100

89%

Faster recovery

Readiness score, tracked with an Oura ring

68Readiness

Session 1

79Readiness

Session 30

91Readiness

Session 60

Less downtime after training or events, with readiness climbing as sessions add up

Clients wearing an Oura ring saw average readiness scores rise from 68 to 91 across 60 sessions.

HRV · ms

84%

Lower stress

Average nightly HRV: higher means calmer

Average nightly heart-rate variability rose from around 31 ms to the mid-50s, a sign of a calmer nervous system.

Data self-reported by clients after a course of HBOT sessions. Curves show the average trend. Individual results vary and are not guaranteed.

Soft vs hard

Two kinds of chamber.

Both raise the pressure and deliver concentrated oxygen. The difference is the shell, the pressure range and how they fit your space.

Lay 1.5, Sit 1.5 and Pro 2.0

Soft chambers

Lay 1.5, Sit 1.5 and Pro 2.0

Flexible, zip-sealed chambers that fit in a spare room and run from a standard power point. Made for home routines.

Pressure
1.5 ATA, or up to 2.0 ATA on the Pro
Oxygen
90%+ via mask or headset
Position
Lying or seated
Power
650 to 1,000 W
Price
From $17,000 delivered
Shop soft chambers
Hard Shell 2.0, Seat One and Seat Duo

Hard-shell chambers

Hard Shell 2.0, Seat One and Seat Duo

Rigid composite, steel or aluminium chambers with touch-screen controls, air conditioning and built-in breathing masks. Built for clinics, gyms and premium homes.

Pressure
1.3 to 2.0 ATA
Oxygen
Up to 93% via built-in mask
Position
Lying, or seated for 1 to 2 people
Power
About 2.6 to 6.7 kW
Price
On enquiry
Compare all chambers

Safety

Safe by design. Simple to use.

Every chamber is built around controlled pressure and easy controls, and a few common-sense rules keep every session comfortable.

Built into every chamber

  • Pressure relief valves that hold the chamber at its set pressure
  • Controls inside the chamber, so you can end a session any time
  • Gradual pressurising and depressurising
  • Emergency stop and intercom on hard-shell chambers
  • Every chamber tested before it's dispatched

Check with your doctor first if you

  • Are pregnant
  • Have a cold, sinus or ear problem, or recent ear surgery
  • Have a lung condition or a history of collapsed lung
  • Have epilepsy or a seizure disorder
  • Have had recent surgery or have an implanted device
  • Are unsure whether pressure is right for you

In the chamber

  • Only take in items your chamber's manual allows
  • No lighters, oils, lotions, aerosols or hair products
  • Wear loose cotton clothing
  • Equalise your ears early and often
  • Stop the session if you feel unwell
  • Follow the operating manual for your chamber

General information only, not medical advice. Speak with a qualified health professional about your own circumstances.

FAQ

Good questions.

The things people ask before their first session.

Ask us anything
What's the difference between mild and medical hyperbaric?

Medical hyperbaric oxygen therapy happens in hospital chambers, usually at 2.0 to 3.0 ATA under medical supervision. Mild hyperbaric usually means 1.3 to 1.5 ATA in a soft chamber for home and wellness use. Our hard-shell chambers reach 2.0 ATA for clinics, gyms and premium homes.

How long is a session?

Most sessions run 60 to 90 minutes, including pressurising and returning to normal pressure.

How often do people use a chamber?

Routines vary. Many owners use theirs several times a week. A qualified health professional can advise on what suits you.

Does it hurt?

No. The main thing you'll notice is fullness in your ears as the pressure builds, like a plane landing. Equalising your ears keeps it comfortable.

I'm a little claustrophobic. Will I be OK?

Soft chambers have clear windows, and the seated hard shells have large doors and windows. You control the session from inside and can stop at any time.

Is the oxygen supply included?

Yes. Every HyperRecovery chamber comes with its oxygen and pressure equipment, so it's ready to use on delivery.

Can I fall asleep in it?

Many people nap during sessions. Follow your chamber's manual for session length and supervision.

Learn

Keep reading.

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Straight answers on the right chamber and setup for your space.