Mastering the Furnus Mod: Smarter Smelting and Grinding in Minecraft
If you have ever wished your furnaces could work faster, use less fuel, or handle ore doubling automatically, the Furnus mod is about to become your new best friend. It introduces two core machines — the Furnus (an advanced furnace) and the Pulvus (a grinder) — both packed with upgrade potential. Instead of cluttering your base with dozens of vanilla furnaces, you can fine-tune a single Furnus to match your production needs perfectly.
What Exactly Is Furnus?
At its heart, Furnus is a straightforward upgrade to the vanilla furnace. It smelts items just like the original, but with a twist: you can slot in various upgrades to alter its behavior. The companion Pulvus machine works as a grinder, crushing ores, stone, and other materials into dusts and doubled outputs. Both machines look similar to a standard furnace but feature a distinctive interface that shows upgrade slots on the left side. You can insert and extract items just like a vanilla furnace, but the real magic begins when you start adding upgrades.
All the Upgrades You Can Apply
Furnus introduces eight distinct upgrades, each changing how the machine operates. You can mix and match them to create the perfect smelting or grinding station. Here is the complete list:
- Speed Upgrade: Increases smelting or grinding speed dramatically, but also ramps up fuel consumption. Perfect when you need results fast and have fuel to spare.
- Efficiency Upgrade: Reduces fuel usage, making your coal or lava buckets last longer. Ideal for eco-conscious players.
- IO Upgrade: Enables full automation. Each side of the machine can be configured to Input, Output, Fuel, or blocked. A special “A” mode lets the Furnus/Pulvus pull from adjacent inventories and push outputs automatically, including hopper and pipe compatibility.
- Slot Upgrade: Adds one extra input slot and one extra output slot, up to a maximum of two. This lets you process two different materials simultaneously or double your throughput.
- XP Upgrade: Increases the amount of experience orbs generated from smelting or grinding, great for early-game enchanting setups.
- Eco Upgrade: Maintains the machine’s heat even when no items are inside, and prevents the progress bar from resetting if fuel runs out. This means no wasted burn time.
- Energy Upgrade: Allows the Furnus or Pulvus to accept RF (Redstone Flux) energy from compatible mods, reducing or eliminating the need for solid fuels.
Each upgrade stacks logically, so a fully upgraded Furnus with Speed, Efficiency, and Eco can blaze through stacks of ore while sipping fuel. The IO Upgrade is where things get really interesting for tech-minded players, because it transforms a simple furnace into a fully automated processing line.
The Pulvus Grinder and Ore Doubling
The Pulvus is the grinding counterpart to the Furnus. It crushes raw ores and other blocks into dusts, effectively doubling your metal output. For example, one Iron Ore yields two Iron Dust, which can then be smelted into two Iron Ingots. The same doubling applies to Gold Ore, Diamond Ore, Emerald Ore, and many others. Even non-ore blocks have useful recipes:
- Stone Bricks → Cobblestone
- Cobblestone → Gravel
- Gravel → Sand
- Glowstone → 4 Glowstone Dust
- Blaze Rod → 4 Blaze Powder
- Wool → 4 String
- Bone → 6 Bone Meal
- Block of Quartz → 4 Nether Quartz
These recipes are not just limited to vanilla materials. If your modpack adds other ores and their corresponding dusts, the Pulvus will likely handle them automatically. You can also edit the configuration file to add custom grinding recipes, making Furnus extremely flexible for modpack creators.
Automation and Cross-Mod Compatibility
With an IO Upgrade installed, the Furnus and Pulvus become fully automatable. You can define each face as input, output, fuel, or blocked using a simple interface. The “A” (auto) setting is particularly powerful because it makes the machine actively pull from neighboring inventories and push results out — no hoppers needed on that side. This works seamlessly with item ducts, pipes, and other transport systems from popular tech mods.
Furnus also plays nicely with external heat sources. The External Heater from Immersive Engineering and the Exoflame from Botania can power both the furnace and grinder, opening up even more creative automation chains. If you are running a modpack that includes those mods, you can skip solid fuels entirely and rely on passive RF or mana-based heating.
If you are eager to try all these features without the hassle of manual installation, you can easily install Furnus via the foxygame.net launcher — a convenient, flexible, and modern Minecraft launcher where you can download mods right from the menu. It handles dependencies like LimeLib automatically, so you can jump straight into upgrading your smelting setup.
Configuration and Modpack Use
Furnus is highly configurable. The mod’s config file lets you tweak every grinding recipe, adjust upgrade effects, and even add entirely new processing chains. This makes it a favorite for modpack developers who want to balance ore doubling or integrate custom resources. The mod is also explicitly open for use in any modpack, so you can include it in your personal collection or public pack without worrying about permissions. Just remember that Furnus requires LimeLib as a dependency, so keep that library mod installed alongside it.
Why Furnus Deserves a Spot in Your World
Furnus takes the familiar furnace mechanic and expands it in a way that feels both intuitive and powerful. Instead of building massive arrays of vanilla furnaces, you can invest in a single, highly optimized machine that grows with your base. The upgrade system rewards experimentation, and the Pulvus grinder gives you early access to ore doubling without needing a complex multiblock structure. Whether you are a lone survivalist or the engineer of a sprawling tech empire, Furnus slots neatly into any playstyle.
By combining Speed, Efficiency, and IO Upgrades, you can create a smelting powerhouse that processes entire inventories in seconds. The Eco Upgrade eliminates the frustration of wasted fuel, and the XP Upgrade turns your furnace into an experience farm. The grinder side of the mod makes mining trips twice as rewarding, and with cross-mod heating support, you can weave Furnus into almost any energy ecosystem. Next time you find yourself staring at a wall of furnaces, remember: one Furnus with the right upgrades can replace them all.