Fuel-Efficient Furnace

Description
"Logs flamed in the wide fireplace, for there was a frosty edge to the air, and a great meat pasty in a stone platter stood smoking on a broad mahogany board."

- The Hour of the Dragon

As an improvement over more archaic smelting holes, the heat in a fuel-efficient furnace is fanned by air entering through an aperture at the bottom of a smelting shaft positioned to capture the prevailing winds. This refinement helps to reduce the cost of fuels such as coal, wood, and ores needed for processing.

Thrall(s) Used

 * Smelter

Repair
Repairing  requires up to:
 * 225
 * 75
 * 75