Does the machine need ventilation around it?

Yes. Leave at least 10 cm of clear space on the intake and exhaust sides.

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Level 3 · Advanced· 4 min read·Updated 2026-06-27

Cooling systems

Cooling is the unglamorous half of hydrogen machine engineering. Without it, peak ml/min is meaningless past the first hour.

Key takeaways

Passive cooling suits short sessions.
Active liquid or forced-air cooling enables continuous duty.
Throttle behaviour is the honest spec to ask for.

Thermal limits

PEM membranes degrade above their rated operating temperature. The control board throttles current to protect the stack. From the user's side, ml/min drops gradually rather than failing abruptly.

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