Eorzea? Same as Madhuri and Emet-Selch? Really, now. Well, that was just a mental readjustment. "Air ducts that run throughout a home. The air is heated or cooled by a device in one location and then pumped through vents into all the rooms at once, keeping temperature stable. Nobody really uses fire for heating anymore unless their house is very old and doesn't have power- chai latte, thank you-"

He stepped back, leaning against a pillar. "-but there's certainly some homes still dependent on wood or oil-burning heaters, I suppose. I've never lived in one."