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Codex Energy Heaters

CaptainGummiball edited this page Nov 10, 2026 · 1 revision

Electric Heater and Heat Exchanger

Two single machines connect heat with the rest of your plant: the Electric Heater turns energy into process heat, the Heat Exchanger turns the Hot Coolant of a reactor into steam. How heat moves in general: see Process Heat.

Electric Heater

The Electric Heater window: 5 energy and tank bars, 6 value, status and redstone lines.

The Electric Heater window: 5 energy and tank bars, 6 value, status and redstone lines.

The Electric Heater turns energy into heat for the block in front of it: a Heat Port of a plant (a boiler, a foundry, a salt store …) or a Stirling Generator. Use it to preheat a boiler, to run a heat consumer from surplus power, or to charge a Molten-Salt Store.

What it does

  • Every tick it turns up to 400 HU worth of energy into heat: 1 E gives 0.9 HU.
  • The heat goes out of the front into the block there. Only what that block takes is used.
  • Heat nobody took is turned back into energy at once, so an idle heater wastes nothing.
  • Converting energy into heat and back (heater, boiler, turbine) always loses energy. Use the heater where heat is what you need.

Energy and automation

  • Energy comes in on every side except the front.
  • It has no slots, no upgrades and no redstone control.
  • The screen shows the energy bar and the heat delivered in the last tick (HU/t).

Building it

Block of Redstone → Electric Heater

In the world While it delivers heat, its coils glow, the brighter the more heat flows.

Heat Exchanger

The Heat Exchanger window: 5 energy and tank bars, 6 value, status and redstone lines.

The Heat Exchanger window: 5 energy and tank bars, 6 value, status and redstone lines.

The Heat Exchanger closes the primary loop of a Fission Reactor (and of every plant that gives Hot Coolant: Tokamak, Micro Black Hole Plant, Hawking Reactor, Battery Hall). The Hot Coolant gives its heat to feedwater and comes back as water; the feedwater boils into steam for a Steam Turbine. It needs no energy.

What it does

  • Every mB of Hot Coolant carries 10 HU. For each mB the exchanger makes 10 mB of steam from 1 mB of feedwater, and returns 1 mB of water to the primary loop.
  • It moves up to 100 mB of Hot Coolant per tick. A large reactor needs several exchangers.
  • The primary water and the feedwater never mix: they have separate tanks.
  • It stops when the feedwater runs out, the steam tank is full or the return tank is full.

Automation

  • Pipes can connect on every side.
  • In: Hot Coolant and water. Water put in always goes into the feedwater tank.
  • Out: steam and water. Water taken out always comes from the primary return tank: pipe it back into the reactor's Fluid Input Port.
  • The screen shows the bars for Hot Coolant, primary return, water (feedwater) and steam, and the Hot Coolant and steam flow per tick.

Important

Two water supplies The reactor gets its cooling water back from the exchanger, but the steam side needs its own water: one mB of fresh water for every mB of Hot Coolant.

Building it

Bucket → Heat Exchanger

In the world The coolant in its sight window glows while Hot Coolant flows through it, the brighter the more.

QNet Codex

Getting Started

Energy

Processing

Rift

Storage

Logic

Reference

Items and Blocks

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