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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.

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Evidence‑Informed Engineering

HydrogenMachines™ systems are built using evidence‑informed engineering, natural materials, and transparent construction. Independent laboratory testing confirms gas purity and composition.