- The net increase in Btus, caused by heat transmission, within a given space.
- A piece of resistance material connected between terminals to produce heat electrically.
- That portion of a heating device, such as a stove or soldering gun, consisting of a wire or other metal piece heated by an electric current.
- An increase in the amount of heat in a body or region. This may result as a consequence of solar radiation, the heating effect, a fan blowing hotter air into a region, and so on. Heat is transferred from a hotter body or medium to a colder body or medium.