Instead, their device relies on buoyancy to float the hydrogen bubbles up into a storage chamber.

An antechamber and a storage chamber completed the set of interior rooms.

Lanterns in the windows illuminated the cartridge storage chamber without the risks inherent with an open flame.

Each drying storage chamber has temperature and humidity controls set to match seasonal variations.

Each cavern storage chamber can be accessed either via road, standard gauge rail or the site's own narrow gauge railway.