Big Furnaces

Big furnaces are large, expensive replacements to the vanilla furnace.

Use/Progression
Big furnaces are used for smelting ores faster and more easily than the bloomery. They come in 3 tiers: bronze, iron, and steel. They smelt 4 items at once, but THEY DO NOT COOK FOOD. Only ores will work in big furnaces, cooking is done with a spit instead.

Construction
Requires 44 ingots for a full furnace.

The Furnace blocks must be placed over a furnace hearth

Surrounding the left, right, back and top of the furnace block needs a block of it's material(bronze furnace uses bronze blocks,

Iron uses iron blocks, and steel uses steel blocks). You can also put other furnace blocks behind or on the sides(meaning you can

line up furnaces with only 2 sides needed)

Surrounding the left, right and back of the heater block can be any stone:

The heater under bronze furnaces can be any stone

The heater under iron furnaces can be any stone with 2.0 hardness or higher(like slate)

The heater under steel furnaces can be any stone with 5.0 hardness or higher(like granite)

Furnaces can share chimneys from neibouring furnaces(only 1 block radius)

Make sure the front of the furnace isn't obstructed by a solid block