The claim is that the walls can be hotter than the room around it. By the second law of thermodynamics, heat doesn't naturally move from a cooler object to a ho

The claim is that the walls can be hotter than the room around it. By the second law of thermodynamics, heat doesn't naturally move from a cooler object to a hotter object, or as Flanders and Swann would put it, "heat don't move from a cooler to a hotter" (https://youtu.be/VnbiVw_1FNs?t=127 https://youtu.be/VnbiVw_1FNs?t=127) [1]