Molecular hydrogen.
Precisely delivered.

The next generation of molecular hydrogen inhalation.

InhaleH₂ is designed around controlled Fraction of Inspired Hydrogen (FiH₂), helping deliver a consistent concentration rather than relying on total gas output alone.

Precision starts with what you actually inhale.

WHY CONTROL MATTERS

With hydrogen inhalation, the amount a machine produces is not necessarily the amount you actually breathe. FiH₂, or Fraction of Inspired Hydrogen, describes the percentage of hydrogen in the air mixture that reaches the lungs.

InhaleH₂ uses a reservoir-controlled system designed to provide a defined inspired hydrogen concentration, reducing variability caused by breathing patterns and ambient air dilution. It is a more precise, consistent approach to molecular hydrogen delivery.

See how the InhaleH₂ system is set up, how the concentration is selected, and how the reservoir-controlled delivery system works in practice.

Want to know whether InhaleH₂ is right for you or your practice?

InhaleH₂ at a glance

0.5–4.0% FiH₂

Adjustable inspired hydrogen concentration.

>99.999% H₂ purity

Generated using SPE-PEM electrolysis.

12 L/min total gas flow

Designed to support stable delivery during normal breathing.

3 L reservoir system

Built to accommodate natural changes in inspiratory flow.

Advanced engineering designed to make molecular hydrogen inhalation simple, controlled and reproducible.

The smallest molecule. A growing field of research.

Molecular hydrogen, H₂, is a colourless, odourless gas that is already naturally present within human biology.

Research has explored its relationship with redox balance, mitochondrial signalling, inflammatory signalling and cellular stress responses, while our understanding of its biological effects continues to evolve.

Rather than acting like a broad-spectrum antioxidant, molecular hydrogen is increasingly described as a selective redox modulator, which is one reason it continues to attract scientific interest.

Frequently Asked Questions

What Does Hyperbaric Oxygen Therapy Feel Like?

At the start of the treatment session, oxygen immediately begins to flow, and the pressure is gradually increased. You will generally start to feel a fullness sensation in the ears, similar to ascending or descending in an airplane.

This fullness should only last about 10 minutes and our experienced Oxygen Therapy technician will guide you to relieve any ear pressure, usually by yawning or swallowing.

Once treatment pressure is reached, patients relax and just breathe normally. Near the end of the treatment session, the hyperbaric technician will gradually decrease the pressure in the chamber, a process that lasts about 10 minutes.

During this decompression stage, it is common for patients to experience a slight popping sensation in the ears as a result of the change in pressure.

Are There Any Side Effects Associated With Hyperbaric Oxygen Therapy?

HBOT is a therapy with minimal side effects and is extremely safe. The most common side effect (in 10% of patients) is mild irritation to the ears due to changes in oxygen pressure (the same risks associated with flying).

The technicians at Oxygen Room will be with you every step of the way to help prevent this from occurring, but it is advised that you don’t have therapy if you are suffering from a cold or other condition affecting your sinuses.

Other side effects may include temporary vision changes, worsening of cataract, dizziness, or light-headedness. In very rare instances, oxygen toxicity may occur, however, risk of this is mitigated by our HBOT protocols and comprehensive client screening process. A full medical history will be taken at your consultation where we can advise on side effects associated to you.

What Do I Do Inside The Hyperbaric Chamber?

Many clients sleep, watch a movie on their phones or tablets. Read a book, catch up with your emails or work. Our favourite thing is to listen to motivational podcasts

What Kind Of Hyperbaric Chambers Does Oxygen Therapy Bristol Use?

Each of our facilities uses state-of-the-art Mono and Duo hyperbaric chambers. All our chambers are built to high standards by industry professionals. These chambers are made of metal and acrylic which differ from the soft or mild variety.

Our chambers deliver 96% medical grade oxygen vs. room air (which is only about 20% oxygen) and are able to reach greater atmospheric pressure levels. This allows for the treatment of a wider variety of health conditions more efficiently and effectively. Every 6 months our equipment is serviced by our chamber engineers.

It is important to know that Portable/Canvas bag chambers are also known as low-pressure. Fabric hyperbaric chambers are authorized by the FDA only for treatment of acute mountain sickness. Fabric inflatable chambers cannot achieve internal pressures over 1.5 atmospheres and cannot be run on a BIBs breathing system.

Is There Any Preparation Required For Hyperbaric Oxygen Therapy?

We recommend that patients avoid eating or drinking (specifically carbonated beverages) directly prior to treatment, unless medically required, to avoid the need to use the restroom or cause an upset stomach during the session.

Some medications are incompatible with HBOT; a complete list of medications and supplements taken by the patient should be provided to the Oxygen Therapy team during the initial consult, and updates should always be provided.

To maximize the benefit of HBOT, smoking of any kind should be avoided during the course of a patient’s complete treatment protocol. Smoking causes vasoconstriction and accumulation of carbon monoxide and other wastes, all which are counterproductive to HBOT.

Lastly, alcohol consumption should be avoided at least 8 hours prior to treatment.

Who shouldn’t use HBOT?

There are a few contraindications to HBOT such as an untreated pneumothorax, moderate to severe COPD, bullous lung disease, and individuals currently receiving certain chemotherapeutic agents.

It shouldn't be used by people who have had recent ear surgery or injury, a cold or a fever.

During the consultation with a member of our Oxygen Therapy Team, each client is evaluated to determine whether HBOT is a safe and appropriate course of treatment.

What is FiH₂?

FiH₂ means Fraction of Inspired Hydrogen. It refers to the percentage of molecular hydrogen actually present in the air mixture you breathe, rather than simply how much hydrogen a machine produces.

Why is FiH₂ important?

Hydrogen flow rate, breathing pattern, delivery method and ambient air dilution can all affect the concentration that actually reaches the lungs. FiH₂ provides a more meaningful way to understand inhaled hydrogen exposure.

What concentration does InhaleH₂ deliver?

InhaleH₂ allows an adjustable inspired hydrogen concentration from 0.5% to 4.0% FiH₂.

Why does InhaleH₂ use a reservoir and mask?

The reservoir-controlled system is designed to reduce variability caused by natural changes in breathing and ambient air mixing, helping provide a more consistent inspired hydrogen concentration.

Why doesn't InhaleH₂ use very high hydrogen concentrations?

Higher output does not automatically mean better delivery. In air, hydrogen becomes flammable from approximately 4% concentration, which makes precise concentration control an important part of responsible hydrogen inhalation.

Is molecular hydrogen a medical treatment?

InhaleH₂ is designed as a controlled method of molecular hydrogen delivery and is not positioned as a treatment, cure or substitute for medical care.

Who is InhaleH₂ designed for?

The system has been developed for people interested in molecular hydrogen inhalation, including consumers, clinicians, health professionals, wellness centres and research environments.

Is the machine difficult to use?

The system uses a simple control interface that allows the user to select the session duration and hydrogen concentration. The machine also supports Wi-Fi connectivity for software updates.