G2 Gas Fitter Practice Exam

The primary purpose of a heat reclaimer in a venting system is to extract heat from the gases that are produced during combustion processes. This technology is instrumental in energy efficiency, as it captures otherwise wasted thermal energy from exhaust gases and redirects it for reuse within the system or for heating purposes. By harnessing this heat, a heat reclaimer helps to improve the overall efficiency of the heating system, reducing energy consumption and operational costs.

In this context, heat reclaimers are particularly important in systems that vent hot gases into the atmosphere, where they would otherwise dissipate their heat. The design and placement of a heat reclaimer facilitate the transfer of heat from the exhaust stream to a fluid, often water or air, which can then be used for space heating or to enhance the efficiency of boiler operations.

The other options pertain to different functions that are not related to the primary role of a heat reclaimer. While regulating gas flow, providing mechanical draft, and igniting the fuel supply are crucial aspects of venting systems and combustion efficiency, they do not align with the primary function of extracting heat from gases.