Furnace I
Furnace I smelts Bronze Ingots, and every early Bronze Detail goes through it. It comes with Bronze Melting (10 red) and costs 6 Pieces of stone and 12 Bricks, so it waits for both the Stonemason’s Workbench and the Kiln. It stands in your yard and works by itself once loaded.
| Makes | From | Technology | Smithing |
|---|---|---|---|
| 2 Bronze Ingots | 3 Bronze Scrap, 10 Fuel | Bronze Melting | 1 |
| 4 Bronze Ingots | 3 Copper Nuggets, 1 Tin, 20 Fuel | Bronze Forge | 2 |
| 3 Glass | 3 Sand, 10 Fuel | Glass | 2 |
| 2 Empty Bottles | 1 Glass, 10 Fuel | Glass Blowing | 3 |
| 2 Alchemy Flasks I | 2 Glass, 10 Fuel | Glass Blowing | 2 |
Crafted here (7)
| Ingredients | Outputs | Mastery | Duration | Tech points |
|---|---|---|---|---|
 Glass ×2  Fuel ×10 |  Alchemy Flasks I × 2 ( Glassworker +1 ) |  2 | 9 | 2 |
| Fuel ×10 Required extension: Bellows | 3 | 12 | 3 | |
| Glass ×1 Fuel ×10 |  Empty Bottle × 2 ( Glassworker +1 ) | 3 | 8 | 2 |
 Sand ×3 Fuel ×10 | Glass × 3 ( Glassworker +1 ) | 2 | 6 | 1 |
 Tin ×1 Fuel ×20 |  Bronze Ingot × 4 ( Fireman +1 ) | 2 | 9 | 2 |
 Bronze Scrap ×3 Fuel ×10 | Bronze Ingot × 2 ( Fireman +1 ) | 1 | 9 | 1 |
| Sand ×8 Fuel ×30 Required extension: Bellows |  Lens × 2 ( Glassworker +1 ) | 5 | 12 | 3 |
Notes
- It burns Fuel, not Firewood. Build a Firewood shed in the yard (same technology) and fill it with Firewood: 2 Firewood make 20 Fuel.
- A batch of ingots takes about 2 minutes (9 steps of 15 seconds). Starting it needs the Smithing mastery in the table, checked against your own.
- Two recipes here need Bellows built against the furnace: the Lens and Alchemy Flasks II. The Bellows come with the Bellows technology (30 red) and cost 4 Wooden Planks, 4 Bronze Nails and 2 Leather Scrolls. The other extension, the Casting Table, only serves Furnace II’s Engineering Details.