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Level 2 · Buyer· 4 min read·Updated 2026-06-27

Questions to ask before buying

A short, blunt question list. Answers should be specific, not aspirational.

Key takeaways

  • Specific numbers beat marketing language.
  • Refusal to answer is itself an answer.

The list

1. Sustained output at 60 minutes? 2. Continuous run-time before throttle? 3. Purity test method? 4. CE, FCC, RoHS, ISO 9001, ISO 13485 documents available? 5. Warranty length and coverage? 6. Spare parts availability and price? 7. Service turnaround? 8. Water type required? 9. Power draw at peak? 10. Acceptable input voltage range? 11. Country of manufacture? 12. Returns policy?

Frequently asked questions

Walk away. Engineering-led vendors have these answers ready in writing.

Related products

Related learning

Purity, tablets & bathing

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We Build the Equipment. You Make the Decision.

This category has a real trust problem — overstated claims, high-pressure sales, machines with no independent verification behind them. We're not adding to that. We build hydrogen systems using transparent construction and natural materials, and every unit is independently lab-tested for gas purity and composition. Whether hydrogen inhalation is right for you is a decision to make with your own research and your own doctor — not something we're going to try to convince you of.