What is the cheapest way to heat a room?
Excercise vigorously in it. Body heat... It's the best kind
As refrigerators give off heat from the back, the only real way to conserve the heat from it is to use it in a room that is already cold. Thus using the heat from the heat exchange on the back to add to any heat source in the room. This will not act as a heater for the room but may help to maintain the temperature very slightly when the heating is turned off.
In order to heat a room evenly should heating vents be placed near the floor or near the ceiling of the room?
It can keep a room warmer or cooler. A polished surface will reflect radiated heat. If the heat is from the sun outside, it will be reflected away from the window and reduce the amount of heat entering the room. If the heat is inside the room while it is cold outside, the foil will reflect it back into the room and reduce the heat loss from the room, so keeping the room warmer.
In my particular case, the kinetic energy of my father's hand would be converted into heat energy in that event, resulting in an increase in the temperature of the seat of my pants. Speaking thermodynamically . . . when the fridge door remains open in a sealed room, the fridge keeps removing heat from the room-air that enters it, and expelling that heat into the room, along with the heat of the compressor and circulation…
No, leaving the door of a refrigerator open will not cool a room, but will actually make the room hotter. A refrigerator cools its own interior by pumping heat to the heat exchange coils in the back (some models do not have exposed heat exchange coils, but the sides or back of the refrigerator have coils just underneath them, and they get hot). Those heat exchange coils pump heat into the room. Since the process…