people do that, but it's not an efficient way to heat. The most efficient heaters pump heat from somewhere else, even when the source has a lower temperature, l

people do that, but it's not an efficient way to heat. The most efficient heaters pump heat from somewhere else, even when the source has a lower temperature, like the way a fridge pumps heat from inside the cold fridge to the air in your house. (my apologies for assuming you live in a house if you are actually a 12 dimensional entity that lives on a space whale)