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Iron Furnaces provides two ways to improve your setup: crafting a new furnace block or using Upgrade Items to transform an existing furnace in the world without breaking it.
Upgrade Items
By right-clicking a furnace with these items, you can instantly upgrade it to the next tier while preserving the items and fuel inside.
- Stone to Iron Upgrade: Upgrades a Vanilla Furnace to Iron.
- Iron to Gold Upgrade: Upgrades an Iron Furnace to Gold.
- Gold to Diamond Upgrade: Upgrades a Gold Furnace to Diamond.
- Diamond to
Emerald Upgrade: Upgrades a Diamond Furnace to Emerald. - Emerald to Netherite Upgrade: Upgrades an Emerald Furnace to Netherite.
- Copper/Silver Variants: Specific items exist for branching paths (e.g., Stone to Copper).
Augments
Augments are specialized items placed into the furnace's augment slots (accessible via the GUI) to change its behavior.
| Augment | Effect |
|---|---|
| Speed Augment | Decreases smelting time further at the cost of higher fuel consumption. |
| Fuel Efficiency Augment | Makes fuel last longer but may slightly slow down smelting. |
| Ore Processing Augment | Provides a chance to double or triple the output of ores. |
| Smoking Augment | Converts the furnace into a Smoker (fast food cooking). |
| Blasting Augment | Converts the furnace into a Blast Furnace (fast ore smelting). |
| Factory Augment | Adds internal auto-input and auto-output capabilities. |
| Wireless Heat Transmitter | Allows the furnace to pull fuel/heat from a remote source. |
