Duplication Furnace

A special furnace that doubles every item you smelt, no exceptions!

1.2K Downloads

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Rent Server with this Mod

About this Mod

🔥 Duplication Furnace

Duplication Furnace is a simple but powerful Minecraft mod by Shirjeel_plays that lets you smelt any item and get double the output — no rules, no restrictions, just pure duplication fun! Perfect for speedrunning resource gathering or making survival a little more chaotic.

🎮 Fun fact: This mod is also used by GamerFleet in his Minecraft worlds!

✨ Features

Works with all smeltable items — ores, food, blocks, anything.
Gives x2 output every time you smelt.
Survival-friendly crafting recipe.
Unique enchanted-glint texture so you’ll never confuse it with a normal furnace.
Supports Fabric Loader 1.20.1 with Fabric API.

🛠 Crafting Recipe

Place a Furnace in the center of a crafting table and surround it with Iron Ingots.

📷 Media

Check out my YouTube for showcases and tutorials:
▶ Shirjeel_plays YouTube

📦 Installation

Download the latest .jar file from the Releases page.
Place it in your Minecraft mods folder.
Launch the game with Fabric Loader.

⚠ Compatibility

Minecraft: 1.20.1
Mod Loader: Fabric
Required: Fabric API

Made with ❤️ by Shirjeel_plays

Available Versions

Duplication Furnace 1.0.0release

MC 1.20.1fabric

August 15, 2025

How to Install Duplication Furnace on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.20.1).

Install Mod

Open the mod browser in the dashboard and search for "Duplication Furnace". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.20.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Duplication Furnace server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Duplication Furnace compatible with fabric?

Duplication Furnace officially supports fabric for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Duplication Furnace – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Duplication Furnace consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.