Key takeaways
- A bath system dissolves H₂ into bath water in real time.
- Output is rated in parts per billion (ppb) of dissolved H₂.
- Quality systems target >1,500 ppb sustained across a full bath.
- No plumbing changes are required — the unit sits on the bathroom floor.
How it works
The machine produces H₂ via PEM electrolysis (the same core technology as an inhaler) and uses either nano-bubble diffusers or a dedicated saturation chamber to dissolve that gas into water before it enters the bath.
Two delivery patterns dominate: an inlet hose that drops into the bath water, and a hydrogenator rod that sits in the tub. The best systems combine both for faster saturation.
Why dissolved concentration matters
Free hydrogen gas escapes a tub surface quickly. The figure of merit for a bath system is the dissolved concentration sustained over a 20–30 minute soak — typically expressed in ppb.
A weak system might produce visible bubbles but only 200–400 ppb dissolved. A purpose-built system like the HERO Bath targets >2,000 ppb at a 3,500 ml/min hydrogenated water rate.
Inhalation vs bathing — different jobs
Inhalation delivers H₂ directly to the lungs at a known flow rate. Bathing delivers dissolved H₂ across a much larger surface area at a lower per-area concentration.
Many households operate both: a daily inhaler for routine use, a bath system for weekend or recovery rituals.
Engineering notes
- · Tap water hardness affects dissolution efficiency. Soft water saturates faster.
- · Tub volume and starting water temperature both affect achievable ppb.
Frequently asked questions
Related products
Related learning
Purity, tablets & bathing
- Hydrogen Bathing vs Hydrogen Tablets — Saturation versus dilution, compared in full.
- Hydrogen Water Purity — model-specific gas composition from SPE/PEM electrolysis.
- Hydrogen Tablets: What You Should Know — What dissolving reactive material can leave behind.
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