Key takeaways
- ml/min = volume of H₂ delivered per minute at the outlet.
- Real-world delivery depends on purity, cannula and breathing pattern.
- Two machines at the same ml/min can deliver very different sustained output.
What the number means
ml/min is millilitres of gas leaving the outlet per minute. At ≥99.991% purity, essentially all of that is H₂. At lower purity, a chunk is water vapour or oxygen.
Sustained vs peak
A machine may hit its headline ml/min for 5 minutes from cold start and then drop as the stack warms. Check the continuous run-time figure: that's what you'll actually breathe over a 60-minute session.
Frequently asked questions
For a single user on short daily sessions, yes. For two users or long sessions, look at 900 ml/min and above.
Related products
Related learning
Next lesson
Hydrogen concentration explained
Continue →Purity, tablets & bathing
- Hydrogen Bathing vs Hydrogen Tablets — Saturation versus dilution, compared in full.
- Hydrogen Water Purity — 99.991% certified purity from SPE/PEM electrolysis.
- Hydrogen Tablets: What You Should Know — What dissolving reactive material can leave behind.
Ready to choose a machine?
Direct prices · free worldwide delivery · 24-month warranty.
Source content adapted from hydrogen-inhaler-how-long.