Iron furnace (coal power)

This would be a furnace made of iron it would burn slower and would not be able to smelt items. It could be used to power items such as redstone and pistons however it’s main use would be in golems (read my other post for more info) it would be crafted by surrounding a furnace in either iron ingots or blocks. In the end it’s up to the devs to decide how the furnace is created and how it functions.