Automatic Infinite Furnace

Published on March 29, 2026

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About this build

This compact redstone contraption offers an automated and continuous smelting solution. Utilizing pistons and slime blocks, it efficiently processes items through a furnace, with integrated hoppers for both input and output. Its design minimizes footprint while maximizing utility for any survival base.

hopperHopper4
Chest3
observerObserver2
sticky_pistonSticky Piston2
slime_blockSlime Block2
spruce_trapdoorSpruce Trapdoor2

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Build Details

A clever design of an automatic infinite furnace design. It uses a glitch to duplicate carpets which are then used as fuel. This way, the furnace will never run out of fuel and you can smelt/cook as many items as you like to without needing to use coal. This machine doesn't need a setup. You just need to put the items to smelt/cook into the top left chest and the machine will work. Tested in 1.20 but should work in other versions too

Dimensions7 × 4 × 2
Blocks22
Minecraft1.0
Original FormatStructure Block
File Size668 B

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