Thermal Expansion
by TeamCoFH
An expanding tech mod that adds machines, dynamos, augments, and a modular RF energy system for resource processing.
Overview
Thermal Expansion is a tech mod created by TeamCoFH. An expanding tech mod that adds machines, dynamos, augments, and a modular RF energy system for resource processing. As a tech mod it concentrates on machines, automation, and resource processing, and it has been downloaded around 110 million times, which puts it among the options players reach for in this space.
Thermal Expansion is built for players who want compact, augment-driven machines on the CoFH RF system. Each machine accepts augments that change its behaviour, so a single block can be tuned for speed, efficiency, or secondary outputs. It rewards a bit of learning, so expect to spend some time understanding its systems before they click.
The mod is available for Forge and NeoForge, so it fits a range of modpacks and launchers. It currently supports Minecraft 1.20.1 and 1.21.1, spanning the 1.20.1 to 1.21.1 releases. It runs on both the client and the server, so on a multiplayer server every player who connects needs it installed alongside the server itself.
Mod Loaders
Minecraft Versions
Key Features
Thermal Expansion brings a focused set of features to the table. Highlights include modular machine upgrades with augments, plus dynamo power generation, with the full list below.
- Modular machine upgrades with augments
- Dynamo power generation
- Portable tanks and caches
- Fluid and item transport ducts
- Phytogenic insolator for automated farming
Dependencies
This mod requires the following dependencies to be installed:
Tags
How to install Thermal Expansion
Thermal Expansion supports Forge and NeoForge; pick one loader (you cannot mix them) and install it for your chosen Minecraft version. It is built for Minecraft 1.20.1 and 1.21.1, so make sure your profile uses one of those versions.
- 1Choose and install one mod loader from Forge and NeoForge for a Minecraft version this mod supports (1.20.1 and 1.21.1).
- 2Download the required dependency for the same version and loader: CoFH Core. Thermal Expansion will not load without it.
- 3Drop the Thermal Expansion .jar file into your instance's mods folder. On a server, place it in the server's mods folder instead, and make sure every connecting player has it too.
- 4Launch the game with that loader profile and confirm Thermal Expansion appears in the in-game mods list; if it does not load, re-check the loader, the Minecraft version, and the dependencies above.
Supported Minecraft versions: 1.20.1 and 1.21.1. Always download the build that matches your version exactly, as mod files are version-specific.
See our full mod install guideCompatibility & alternatives
Thermal Expansion works particularly well alongside Thermal Foundation, Thermal Dynamics, and CoFH Core. It depends on CoFH Core, so those must be present and on the same loader and version. It targets the Forge side of the ecosystem, so it fits comfortably into Forge and NeoForge packs.
Thermal Expansion has a modest footprint for what it adds and is widely used in modpacks without notable performance concerns.
If you are comparing options, similar mods include Mekanism and Ender IO. They cover comparable ground, so the right choice usually comes down to your loader, version, and the rest of your pack.
Frequently asked questions
What does the Thermal Expansion mod do?
An expanding tech mod that adds machines, dynamos, augments, and a modular RF energy system for resource processing. It is a tech mod by TeamCoFH, aimed at players who want compact, augment-driven machines on the CoFH RF system.
Is Thermal Expansion Forge or Fabric?
Thermal Expansion supports Forge and NeoForge. You only install it on one of these loaders, never several at once, so choose the one your pack uses.
What Minecraft versions does Thermal Expansion support?
Thermal Expansion supports Minecraft 1.20.1 and 1.21.1. Be sure to download the file built for your specific version, since mod jars are not interchangeable across versions.
Does Thermal Expansion need any dependencies?
Yes. Thermal Expansion requires CoFH Core to be installed on the same loader and Minecraft version, or it will fail to load.
Can I use Thermal Expansion on a multiplayer server?
Yes. Thermal Expansion runs on client and server, so install it on the server and make sure every player who joins has the same version installed too.
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