Heat Exchanger
Is it hot or is it cool?
<&multiblock>The Heat Exchanger is a countercurrent exchanger — hot fluid enters one side and exits the other as it cools, while the fluid being heated flows the opposite direction through the second loop.

§lOperation§r
    - The §lHeat Exchanger§r needs hot fluids to make other fluids.
    - A comparator against any exterior block outputs a signal proportional to how full its internal Flux buffer (<config;i;heat_exchanger.energy_capacity> Flux) is.