I have read this question:
Let me offer a different perspective on this. Cooling is not universally harder than heating.
Now I have noticed that whenever in the summertime I cool a room down (which itself is very hard, takes long hours, if not a whole day), if I turn off the AC, the room warms up almost immediately, maybe a half an hour and it is completely warm again (I tried this in the summertime, when there was a heatwave, and the same happened).
Now on the other hand, in the wintertime, if I warm up the same room (pretty easy, takes few minutes, maybe a half an hour with furnace or electric heater), and then turn off the heater, the room stays warm for very long, long hours, sometimes the whole day, without cooling really off.
This room is in California, on the second floor, and the roof gets direct sunlight.
Naively, I would think that it is all thermodynamics, particles colliding, interacting, and exchanging kinetic energy. As the room tries to cool off or heat up (after turning off the heater or the AC), it should do it through the walls and windows, the particles should collide and exchange kinetic energy, until it (the air molecules) finds thermal equilibrium with the outside temperature (the air molecules outside).
Please note I am not asking why it is so hard to cool the room down with an AC in the first place or why it is so easy to heat it up with a heater. I am asking why the cool room warms up faster (loses the cold after you turn off the AC) than the warm room loosing cool down (lose the heat after you turn off the heater).
- Why is it so much harder to keep the same room cool than to keep it warm?