Heat loss or heat gain is the measure of the total heat transfer through your body, clorhing, building walls, etc. Just because something is hotter than it's surroundings does not mean it will stay that way, it constantly needs thermal energy to keep the temperature the same. Heat will always try to transfer from the hotter to the colder. This process occurs naturally whenever there is a temperature difference between two systems, and it can have various consequences, including increased energy consumption and decreased comfort in buildings and homes.
Heat Loss can Occur Through Several Mechanisms
Conduction - The transfer of heat through a solid material, such as a wall or window.Convection - The transfer of heat through a fluid (liquid or gas) caused by the movement of the fluid itself.
Radiation - The transfer of heat in the form of electromagnetic waves.
