External Heater
Now you're cooking with flux!
<&recipe>The External Heater generates heat from Flux, which it outputs to the heat vents on its sides.
It cannot produce the reducing atmospheres used in Blast Furnaces, woodsmoke for food preservation, or temperatures necessary for kilns.
When placed next to a normal furnace, this thermal energy will provide the furnace heat without consuming fuel.
The sides of the heater can be configured with the Engineer's Hammer, sneak to target the opposing side.
The heater will consume 8 Flux/t for each furnace it needs to heat. To preheat the furnace, it will take four times that, until the furnace is at temperature.
When a furnace is at maximum temperature, the External Heater will consume a total §o32 Flux/t§r per furnace for increased smelting speed, unless a redstone signal disables the speed boost.
Only furnaces which have items to smelt and space to smelt them will be heated.