Gas Heat ESCO Practice Exam 2025 – Comprehensive All-in-One Guide for Exam Success!

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What is a common consequence of improper combustion in a gas furnace?

Increased heat efficiency

Decreased lifespan of the furnace

Safety hazards such as carbon monoxide production

When combustion in a gas furnace is improper, one of the most serious consequences is the production of safety hazards, particularly carbon monoxide. This odorless, colorless gas is a byproduct of incomplete combustion and poses significant health risks, including the potential for poisoning. A properly functioning gas furnace should combust fuel efficiently, producing primarily carbon dioxide and water vapor, while keeping harmful emissions to a minimum.

The presence of carbon monoxide indicates that the combustion process is not functioning correctly, which can lead to dangerous levels of this gas in living spaces. Therefore, ensuring proper combustion is critical not only for the efficiency of the furnace but also for the safety of the occupants.

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Cost savings on fuel

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