Gas Heat ESCO Practice Exam 2025 - Free Gas Heat ESCO Practice Questions and Study Guide

The purpose of a heat exchanger in a gas furnace is to transfer heat from combustion gases to the circulating air within the home or building. When natural gas is burned in the furnace, it produces hot exhaust gases. The heat exchanger captures this heat, allowing the warm air from the furnace to be efficiently circulated throughout the living space while keeping the combustion gases safely contained and separated from the breathable air. This process is crucial for ensuring the furnace operates efficiently and safely, maximizing energy usage while providing effective heating to the environment.

Other considerations include that filtering dust and debris relates more to air filters rather than heat exchangers, while storage of excess heat pertains to systems like thermal storage tanks rather than the heat exchanger function. Noise reduction is typically managed through insulation or design features separate from the main function of the heat exchanger itself.