system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do digital thermostats have both heat and cool settings, as opposed to a singular temperature control

(e.g why does 70 degrees on “cool” feel colder than 70 degrees on “heat”)?
gpt
Depends on the thermostat, but generally cool is connected to an AC unit while heat is connected to a furnace. When heat is on the temperature might go above the selected temperature and when cool is on it might go below the selected temperature. It would be extremely inefficient to make the temperature be exact since a house has a pretty large volume. Thus the heating/cooling system is more of a greater than/less than system.