40d:Furnace

A furnace is a building used to heat materials. It can be powered by fuel or, in the case of magma furnaces, by the heat from magma. Every furnace must be built from fire-safe materials, and magma furnaces must be built from magma-safe materials. Magma furnaces must also be placed with one of their edge tiles above magma with depth of 3 or more; this can be accomplished by digging a channel for the magma. Other than these requirements, they are identical to workshops.^{v0.23.130.23a}

Wood furnace

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Materials needed to build – 1 fire-safe building material
Materials used – wood
Items made – ash, charcoal

Smelter

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Materials needed to build – 1 fire-safe building material
Materials used – Ore
Items made – metal bars

Glass furnace

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Materials needed to build –
Materials used – Sand, Rock crystal, Pearlash, Charcoal, Coal
Items made – Green glass, Crystal glass, Clear glass

Kiln

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Materials needed to build –
Materials used – Potash
Items made – Pearlash

Magma smelter

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Materials needed to build – one steel bar
Materials used – metal ores
Items made – metal bars

Magma glass furnace

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Materials needed to build – One steel bar
Materials used – Sand, Pearlash, Rock crystal
Items made – Glass objects

Magma kiln

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Materials needed to build – one steel bar
Materials used – potash
Items made – pearlash