[@Mercenary Lord] Combustion is not a thing.  Heat and light both require ether to happen.  Flame doesn't exist.  Most fossil fuels are burned, so they wouldn't be used.  The workshop forge, as I've imagined it, probably uses some form of ether or something but is probably called "coals" all the same.  You might be able to harness chemical reactions of other types for power, and boiling water with ether-generated heat to make steam can give steam power.  So much of it is blood or extracted from blood, I think.  Animals slaughtered for food can have their ether extracted first, ad there might even be a way to keep it being from so much pain for them?  It's possible that future research (or current but little publicized research) has discovered ways to put one's own ether into a storage state, for later use, or something less...ah...dramatic.