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Eternal Furnace

Eternal Furnace

Craft Hellfire Netherrack, place it under a Furnace, and get infinite fuel forever — at the cost of 1.8× slower smelting. Finally, a use for all that Netherrack.

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185downloads
0followers

Compatibility

Minecraft: Java Edition

26.2
1.20.1

Platforms

Supported environments

Client and server

Links

View source

Tags

Creators

Details

Licensed MIT
Published 3 months ago
Updated 2 weeks ago

Eternal Furnace

Give Netherrack a new purpose.

Craft Hellfire Netherrack, place it directly beneath a regular Furnace, and the Furnace gains infinite fuel — no coal, charcoal, lava buckets, or other fuel required.

The trade-off is speed: when powered by Hellfire, smelting takes 1.8× longer than normal.

How it works

Combine Flint and Steel + Netherrack to craft Hellfire Netherrack.

Place Hellfire Netherrack directly underneath a regular Furnace and add something to smelt. The fuel slot can remain completely empty.

Normal Furnace Hellfire Furnace
Fuel Consumes normal fuel Infinite
Standard smelting time ~10 seconds ~18 seconds
Fuel slot required Yes No

The slowdown is calculated from the recipe's normal cooking time, so recipes with custom smelting times are supported as well.

Features

  • New block: Hellfire Netherrack
  • Infinite Furnace fuel
  • Balanced by 1.8× longer smelting time
  • Existing normal fuel is allowed to finish burning before Hellfire takes over
  • Fuel stored in the fuel slot is not wasted while Hellfire is active
  • Smelting progress is preserved when switching between normal fuel and Hellfire
  • Removing Hellfire returns the Furnace to normal vanilla behavior
  • Works only with the regular vanilla Furnace
  • Smokers and Blast Furnaces are intentionally unaffected
  • Supports recipes with custom cooking times
  • Works in both singleplayer and multiplayer

Crafting behavior

Hellfire Netherrack is crafted using Netherrack + Flint and Steel.

Minecraft 26.2 / NeoForge — Eternal Furnace 1.1.0 and newer:
Flint and Steel is not consumed. It loses 1 durability per craft and breaks normally when its durability runs out.

Minecraft 1.20.1 / Forge — Eternal Furnace 1.0.x:
Flint and Steel is consumed by the recipe.

This difference is intentional: the improved durability behavior was added in Eternal Furnace 1.1.0.

Supported versions

Minecraft 26.2

  • NeoForge 26.2.x
  • Java 25
  • Eternal Furnace 1.1.x

Minecraft 1.20.1

  • Forge 47.x
  • Java 17
  • Eternal Furnace 1.0.x

Download the version matching your Minecraft version and mod loader.

Installation

  1. Install the appropriate Forge or NeoForge version for your Minecraft version.
  2. Download the matching Eternal Furnace .jar.
  3. Place it in your mods folder.
  4. Launch Minecraft.

License

Eternal Furnace is licensed under the MIT License.

Copyright © 2026 VeizakN