but what is the premium for this cost?
and how hard is it to ensure that your installation ventilates any stray hydrogen sufficiently?
i remember an episode of Mr Robot where they rigged up a server battery farm to vent mass hydrogen and then use some other device to spark it but the actual reality is that hydrogen combustion is very fussy about air rations, very very tight range, tighter than octane engines use and way way tighter than the ratios of diesel