What to look for in a hydrogen inhaler — a practical checklist.

1.Electrolysis technology — PEM/SPE or alkaline?

This is the most important question you can ask about any hydrogen inhaler. There are two electrolysis technologies in the consumer market:

PEM/SPE — Proton Exchange Membrane / Solid Polymer Electrolyte. Water is the only input. The solid polymer membrane acts as the electrolyte, splitting purified water at the proton level. Hydrogen and oxygen are produced in separated streams. No chemicals required. 99.99% purity achievable at the hydrogen outlet. The correct technology for a daily-use consumer inhaler.

Alkaline electrolysis — uses a liquid chemical electrolyte, typically potassium hydroxide (KOH) or sodium hydroxide (NaOH), dissolved in water. These are corrosive chemicals. Alkaline electrolysis produces mixed gas streams that require additional purification steps, introduces contamination risk, and creates a chemical handling and disposal requirement for the user. It is an industrial production method that is not appropriate for a device you breathe from daily.

The AquaCure AC50 — one of the better-known machines in the market — uses alkaline electrolysis with a lye electrolyte. It is a well-built industrial machine. It is not appropriate as a daily consumer inhaler for most buyers.

Every machine in the Hydrogen Machines range uses PEM/SPE exclusively.

2.Gas purity — what is the certified hydrogen purity?

99.99% pure H₂ at the hydrogen outlet is the standard a correctly engineered PEM/SPE machine achieves. This figure should appear explicitly on the specification sheet.

Purity matters because you are breathing the output of this machine daily. Impurities in the hydrogen stream can include water vapour, oxygen carry-over from inadequate membrane separation, and — in alkaline machines — chemical vapour from the electrolyte.

A well-engineered PEM/SPE machine with correctly separated gas streams produces 99.99% pure H₂ as a natural consequence of its design. A seller who cannot state this figure in writing is either using an inferior electrolysis method or has not tested their output.

Note: 99.99% refers to the hydrogen outlet only. The combined H₂+O₂ stream, when using a Y-connector, will be a mixture — this is expected and correct. Purity is stated for each separated outlet stream.

3.Flow rate — certified ml/min, not estimated

Flow rate — measured in millilitres per minute (ml/min) — determines how much hydrogen is delivered per breath at a given inhalation rate. It is the primary performance specification for a hydrogen inhaler.

Two things to verify:

First — is the figure certified or estimated? A certified flow rate has been measured and verified. An estimated figure is marketing copy. Ask for the test documentation if it is not published.

Second — is the figure pure H₂ output or combined H₂+O₂ total output? This is where many listings mislead buyers. Water electrolysis produces hydrogen and oxygen in a 2:1 ratio. A machine producing 1,500 ml/min total output produces 1,000 ml/min pure H₂ and 500 ml/min pure O₂. Some sellers quote the 1,500 ml/min total as if it were the hydrogen figure — it is not.

Always ask for the pure H₂ figure separately. In a correctly separated 2:1 system, pure H₂ is always two-thirds of the combined total.

4.Certification stack — what is independently verified?

Certifications tell you what has been independently tested and verified about a machine. They are not marketing badges — they are documented test results from accredited laboratories.

CE — European conformity. Covers safety, electromagnetic compatibility and environmental standards. Required for machines sold into the EU and widely required or accepted globally. Absolute minimum for any machine worth considering.

FCC — US Federal Communications Commission. Confirms the device meets US radio frequency emission standards. Required for machines sold in the US; a positive signal for any market.

RoHS — Restriction of Hazardous Substances. Confirms the machine is free from specified hazardous materials including lead, mercury and cadmium.

ISO 9001 — quality management system certification for the manufacturer. Confirms the production process meets an independently audited quality standard.

ISO 13485 — quality management system specifically for medical device manufacturers. The highest manufacturing quality standard relevant to a hydrogen inhaler. A machine whose manufacturer holds ISO 13485 is manufactured to a more rigorous standard than one whose manufacturer holds ISO 9001 alone.

The benchmark: CE + FCC + RoHS + ISO 9001 + ISO 13485. All QY-A series machines carry all five — the fullest certification stack available on any hydrogen inhaler at direct price.

Critically: certification documents should be published and accessible — not listed as logos without supporting documentation. Ask for the actual certificate if it is not published. A legitimate certification has a certificate number, an issuing body, and an expiry date.

5.Safety features — what happens when something goes wrong?

A hydrogen inhaler runs for 20–60 minutes at a time, often in a bedroom or bathroom. Safety cut-offs are not optional.

Three cut-offs every machine should have:

Over-temperature protection — automatically halts the unit if the internal temperature exceeds a safe threshold. Prevents thermal runaway during extended sessions.

Over-pressure protection — automatically halts hydrogen production if gas pressure inside the system exceeds the rated maximum. Critical for maintaining the integrity of the gas delivery pathway.

Low-water cut-off — automatically halts electrolysis when the water reservoir drops below the minimum operating level. Running an electrolysis cell dry causes irreversible damage to the membrane.

Additional features worth confirming:

Separated gas streams — confirmed above under electrolysis technology. Physical separation by the PEM membrane means no flammable hydrogen-oxygen mixture is present inside the machine.

Auto-shutoff timer — lets you set a session length and walk away. The machine stops itself. Important for users who fall asleep during a session.

All machines in our range include over-temperature, over-pressure and low-water cut-offs as standard.

6.Power compatibility — does it work in your country?

Hydrogen inhalers draw meaningful current — typically 50–150W depending on output. Power compatibility matters.

What to check:

Input voltage — look for 100–240V on the specification sheet. This means the machine is dual-voltage and will work on both 110V (US, Canada, Japan) and 230V (Australia, UK, Europe) power systems without a converter.

Frequency — 50/60Hz. Most modern switching power supplies accept both. Confirm this is stated on the spec sheet.

Plug type — the machine will ship with a plug suited to the manufacturer's home market. Confirm whether a plug adapter is included for your country, or whether you will need to source one. A plug adapter is a simple, inexpensive item — it is not a reason to avoid a machine — but confirm it before purchasing.

All machines in our range are dual-voltage (100–240V, 50/60Hz) and ship with a plug adapter appropriate for the destination country.

7.Support, warranty and returns — what happens after you buy?

At this price point — typically $1,500 to $5,000 — post-purchase support is not a nice-to-have. It is a purchase criterion.

Four things to confirm:

Warranty period and coverage — 12 months is the standard. Confirm what is covered (manufacturing defects vs wear parts vs everything) and what the claim process involves. A warranty that requires you to ship a machine back to China at your cost is effectively no warranty.

Returns policy — confirm the window (30 days is standard) and who pays return shipping. A no-questions-asked return window from the delivery date is the reasonable baseline.

Who handles the claim — is there an Australian contact you can reach directly, or does every claim go through an overseas ticketing system? The answer to this question tells you a great deal about the seller's confidence in their product.

Business registration — for an Australian buyer, confirm the seller has an Australian ABN. This establishes that Australian Consumer Law applies to the transaction and gives you recourse through Australian channels if needed.

Hydrogen Machines is operated by YBG Group International Pty Ltd (ABN 22 636 934 999). Every machine carries a 12-month manufacturer warranty and a 30-day return window from the day it arrives. Warranty claims are handled directly via WhatsApp or email — no overseas ticketing system.