Rock the Gas Heat ESCO Exam 2026 – Fire Up Your Future in HVAC!

Question: 1 / 400

What does a flue do in a gas heating system?

Circulates cool air

Ensures proper combustion

Discharges exhaust gases safely

In a gas heating system, the flue plays a crucial role in safely discharging exhaust gases produced during combustion. When natural gas burns, it creates byproducts such as carbon dioxide, carbon monoxide, and water vapor. The flue provides a pathway for these potentially harmful gases to exit the heating system and safely disperse into the atmosphere, thereby preventing them from entering living spaces where they could cause health hazards.

The effectiveness of a flue is vital for maintaining the safety and efficiency of the heating system. A well-designed flue will also facilitate the proper drafting of combustion gases, ensuring that the system operates efficiently. By directing exhaust gases out of the system, the flue contributes to both the overall performance of the gas heating system and the safety of the occupants in the space being heated.

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Regulates the gas pressure

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