Description

Heat Mills are used to warm the air and/or water of a planet.  Generally, if a planet's greenhouse effect is at the desired level, but the climate is still too cold for some other reason (usually Albedo or orbital eccentricity), heat mills are used to warm the environment.

A heat mill is generally constructed in the form of a tower covered in radiator vanes.  In the center of the tower are the heaters .  If a planet's greenhouse effect is too low, fuel-burning heaters may be used to increase it, otherwise the heaters are usually electrical.  The heater heats the radiator vanes, which in turn heat the air and/or water around the heat mill.  

Working in a heat mill is hot, heavy, repetitive and dangerous.  The height of a typical heat mill makes falling a real danger.  Long hours spent adjusting huge radiator vanes, and tending to the heaters make it one of the galaxy's least desirable jobs.

The planet Scharlaff is home to some of the most infamous heat-mills in the galaxy. As the planet gradually drifts away from it’s sun, more of these mills need to be constructed cheaply. So, as a cost-saving measure, the Empire of 1,000,000 Suns staffs them with convicts.