Charcoal Kiln

The Charcoal kiln is a processing structure used to produce Coal from wood. Once built, it converts one unit of Wood, Corewood, or Finewood into Coal every 16 seconds, making it one of the earliest ways to supply fuel for later smelting and cooking chains.

The recipe is unlocked when the player acquires a Surtling Core, and construction requires a nearby Workbench. Charcoal kilns can be placed directly on terrain or on stone structures. They cannot currently be placed on wood structures, although players can work around this by raising terrain with a Hoe until it lines up with wooden floors. Like other processing buildings, it can hold up to 25 units of wood at once.

When adding wood from the player’s inventory, the kiln consumes materials in a fixed priority order: Wood first, then Finewood, then Corewood. This matters when carrying mixed stacks, since the kiln will pull the most basic wood available before using rarer types. Because it is a processing structure, it also speeds up while the player sleeps, which makes overnight use efficient.

A few practical notes make the Charcoal kiln easy to manage:

• Destroying it with a Hammer or other means returns all construction materials, so it can be relocated without loss.
• This makes it practical to alternate between a Charcoal kiln and a Smelter depending on what is needed at the moment.
• An active kiln provides the Fire effect, giving nearby players warmth and scaring away appropriate creatures, with the effect reaching about 2 meters from all sides rather than only from the interaction point.

In normal use, the Charcoal kiln is a simple but important production building: it turns surplus wood into the Coal needed to keep the early and mid-game industry running.