From the Thaumonomicon: "By capturing a Blaze and harnessing its energy within a furnace crafted from obsidian and netherbrick you have created a highly efficient and fuel free furnace. So efficient in fact, that occasionally it will produce bonus material in the form of nuggets or other items[...]"

What are these bonus items and how high is the chance of producing them?


When smelting Ores (not dusts or processed materials) You will receive a nugget for that ore. This also works on meat (cooking chicken will give chicken nuggets)

I'm not sure on the chance but I believe its around 25%, but when you add all of the arcane bellows to it that you can(one on each hole on the side), it not only becomes faster and uses less aura, it also increases the reward chance to something like 90%.

One thing I should mention is although the description says its "free" it's far from it (in Thaumcraft 3 anyway. in Thaumcraft 4 it is free, as explained in the comment). it uses aura from the atmosphere in order to smelt, so if you are using it as a primary furnace and smelting a lot. I suggest getting some aura generation items around otherwise that area will become a painful area.

  • The Infernal Furnace did use Aura in Thaumcraft 3, but as of Thaumcraft 4 it is a fuel-free smelting furnace ( as there is no aura in the mod anymore). You can also provide it with Ignis essentia to increase it's smelting speed, in addition to the bellows. – Phill.Zitt Dec 16 '13 at 15:59
  • Oh well thats neat. I'll edit my answer to reflect that. thanks. – Rapitor Dec 16 '13 at 16:04

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