This describes the transfer of heat by heating, then moving a substance. Simply put, the heat from our fireplaces is distributed via convection. This is when the air in front of the fireplace absorbs heat, becomes buoyant and rises to the ceiling. This draws cooler air behind it, mostly along the floor, which in turn, absorbs the heat and rises up, pushing the already warmed air along the ceiling. As long as there is a source of heat, this cycle will continue, constantly raising the overall temperature of the room.