Hydrogen fuel cells are another kettle of fish…
Nothing to compare with main line hydrogen feeds.
I’m not and will not be tempted to have it within a mile of my house and be against any home type of installations for the ATEX reasons , also may not give of C02 but does give off nitrogen oxide.
I’ll try and find what an H2 explosion did to one of the sites I managed the major works projects for a few years after the explosion .
Here’s the link sorry it’s covered by a pay wall unless you have an abonnenment lemonde (good news paper IMHO), https://www.lemonde.fr/archives/article/1987/01/14/l-usine-thomson-csf-de-velizy-detruite-par-une-explosion_4022970_1819218.h
No as in J (first letter of husbands name) and he is the man shaped person in the house 
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Yes Jane but not mainstream. The likes of Worcester Bosch, Viessmann and Vailant are making town gas boilers that can easily be converted to hydrogen should our (UK) government actually make up its mind and stick to it.