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First Appear Version 1
Type of Block Interactive
Stackable? Yes
Tool Used to Break Axe
Data Values Hex: *Need Info*
*Need Info*
Obeys Law of Physics? No
Luminosity No
Transparency No


The Calefactor is a furnace that runs on Raw Essence.


Lapis Lazuli (Dye)



Redstone (Dust)

Vinteum Dust

Lapis Lazuli (Dye)





Calefactor UI.png


The Calefactor is essentially a magic furnace with a critical smelt slot to the right. However, it needs a line of Raw Essence to function rather than burning fuel.

By default, you will get the same amount of burn time from the Calefactor as a regular furnace if you throw a single coal into the nexus.

With no foci in it, the Calefactor cooks items 20% slower than a regular furnace. However, it is over 100% faster with 3 Charge Foci.

The Calefactor only consumes essence when burning an item, and gives XP for smelted items same as a Furnace.

There is a slight chance the Calefactor creates some additional Vinteum Dust while smelting, which ends up in the critical smelt slot.

Calefactors do not work well with hoppers.

Essence Capacity[edit]


Foci Accepted[edit]

The Calefactor accepts both Charge Foci and Mana Foci.

Charge Foci both make the Calefactor charge faster and cook items faster. However, it uses much more essence per tick to smelt.

Mana Foci reduce the amount of essence used per tick. They can be used in conjunction with Charge Foci to offset the cost.

Essence Use[edit]

Base Essence use per tick 0.1
Base cook time: 240 ticks (20% slower than a normal furnace which is 200)
Formula for essence consumed/tick: [Base Essence use] * (3 ^ [Number of Charge Foci]) * (0.5 ^ [Number of Mana Foci])
Formula for cook time: [Base Cook Time] * (0.7 ^ [Number of Charge Foci]


Essence Conduit, Calefactor, Fabricator and Caster by Huntanor


  • Shift-clicking on the Vinteum Dust in the bottom right slot will not auto-send to inventory.


Version Changes
Beta_3.12 Fixed duplication bug
5.25.022 Now gives experience when shift clicking smelted items out of it