Puddling Furnace Core
Starts the Puddling furnace.
The core stands at the stack end, opposite the firebox, and the stack rises in its own column above it. Place it first, then ctrl plus shift plus right-click it to raise the build outline of the Puddling furnace and its shopping list; the ash pit, the firebox, the hearth and the puddling door are laid from it. Its side variant fixes which way the furnace faces and it wears the refractory tier it was crafted from. The core reports the fire and the bath: how many balls are standing on the bed and how many the charge has left to give.

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topMade by
| any Refractory brick x 4 | any Refractory brick x 4 | any Refractory brick x 4 |
| Rod (Iron or Steel) x 2 | Fire clay x 8 | Rod (Iron or Steel) x 2 |
| any Refractory brick x 4 | Plate (Iron or Steel) | any Refractory brick x 4 |
| Puddling Furnace Core | ||
Needs: 20 any Refractory brick, 4 Rod (Iron or Steel), 8 Fire clay, 1 Plate (Iron or Steel); makes 1 Puddling Furnace Core
Amounts are the mod's defaults; the recipe-cost level changes them (see recipe cost levels).