HVACR Gas Practice Test 2026 - Free HVACR Gas Exam Practice Questions and Study Guide

An electric heating system is primarily composed of resistance heating elements, which are integral to its operation. These elements convert electrical energy into heat through the resistance they encounter as electricity passes through them. This process generates warmth that can be distributed throughout a space to maintain a desired temperature.

In contrast, heat pumps, which are designed for efficiency and can both heat and cool spaces, rely on the transfer of heat rather than direct resistance heating. Gas burners are components of gas heating systems rather than electric, as they utilize combustion of gas to generate heat. Fan coils are often used in conjunction with various heating systems to distribute heated air but do not actually generate heat themselves. Thus, the primary component that defines an electric heating system is indeed the resistance heating elements.