system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come, during summer, I can set my thermostat to 68F and still feel good, while during Winter, the same setting is too cold?
gpt
Radiation.

In summer, the walls are warm, so you do not radiate heat to them very effectively - a lot is radiated right back. In winter, heat you radiate to the walls is lost, as little will radiate back, so you need a higher air temperature to compensate.