it should be noted, though, that energetically speaking, that cube packs more punch than a equal cube of tower. from my fireman friend, i know a small propane tank can blow out windows and doors, and even elevator doors inside an apartment lobby, from at least tens of meters. (50, 100?)
someone threw one into the garbage bin, and there was a bin fire. (perhaps budding arsonists?) he said the instant blast of heat was incredible, as he was running away from the apartment when she blew.
that's pressurized propane, though, not kerosene. i don't recall hearing of exploding kerosene lanterns, lol.
certainly propane exploding burns WAY more efficiently. still. a perspective.
but, then, there's not THAT much difference between kerosene and office contents. carpet and plastic, wood and paper burn quite nicely at the right temperature.