You may have wondered why most people feel comfortable when the temperature is between 70º and 74º although the normal body temperature is much warmer, 98.6°. The answer is that the body has its own heating system, which generates more heat than we require, and the excess is continually given off to the surrounding air.
Since our body creates its own heat, the purpose of a home heating system is simply to control the amount of heat in the air so that our bodies can dissipate excess heat in comfort.
