How chunk heat works
Heat is stored per 16 by 16 block chunk and affects adjacent chunks. Workstations create discrete heat packets. At 100 points the counter resets and a scouting event can begin.
Do generators and electric lights add heat?
Generator, battery and solar banks do not add meaningful passive heat. Non-fire light sources such as spotlights are also safe.
Why are torches marked as a reference model?
Flickering fires use a different real-time emission rule. Their exact result depends on game speed, so the planner uses the published packet values as an approximation.