Machine Heat

All Terumetal mod machinery runs on heat energy as shown by a meter with a flame icon.

Early and simple machines have a Heat In slot in the upper-left for providing heat to them directly. You can insert one of the following and receive the related item back once the heat enters the machine:

• Bucket of Lava -> Empty Bucket
• Copper Heat Battery (Full) -> Copper Heat Battery (Empty)
• Thermese Heat Battery (Full) -> Thermese Heat Battery (Empty)

Buckets of lava are fairly self-explanatory; they will provide a large boost to heat and return the empty bucket at the cost of losing the lava.

Heat Batteries are a more renewable method of adding or transferring heat between machines. Copper batteries hold an amount of heat equal to burning a piece of coal and can be made without any alloying, thus they make a good beginning way to heat machines. Thermese batteries are an efficient way to transfer a much larger amount of heat through a single item as they hold an amount equal to burning a whole block of coal.

Heat Batteries can be filled by either "cooking" them in a furnace, or by placing an empty battery in the "Heat Out" slot of heaters or storage machines.

External Heaters

External heaters are necessary for more advanced machinery as they do not have the space to spare for fuel-using machinery themselves. On the plus side, machines that are created solely for the purpose of generating heat are more efficient at doing so.

All heaters are capable of transferring their own heat to adjacent heat machines and will do so automatically. If multiple eligible machines are adjacent, the heat they transfer each tick will be shared evenly. This will happen unless adjacent heat transfer is deactivated specifically by the transfer button on the Heater's UI or on the target machine's UI.

The three External Heaters are as follows:

• Tier 1: Furnace Heater - Generates heat from any furnace fuel
• Tier 2: Solar Heater - Generates heat from sunlight
• Tier 3: EEE Heater - Generates heat by leeching from the surrounding environment (blocks)

Heat Storage and Distribution

Once Tier 2 or Tier 3 machinery are within your grasp, it is likely you have many machines and the capacity to generate great amounts of heat energy as necessary.

The simplest way to distribute heat via adjacent connections are the Thermobox and Thermal Distributor. The Thermobox also acts as a high-capacity battery for heat storage.

The next level of heat distribution is over Heatlines, controlled by a Heatline Distributor. This allows short and medium range transfer of heat quickly and efficiently.

The most expensive and long-distance way to transfer heat is via the HEAT Ray Emitter and HEAT Ray Reflectors which can send large amounts of heat energy through the air to a machine at the destination of its ray.