NATE Gas Heating Practice Exam

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What is one reason for installing a condensate trap in a furnace?

To enhance gas pressure
To collect excess fuel
To prevent water from leaking into the vent system
To ensure proper airflow

The correct answer is: To prevent water from leaking into the vent system

Installing a condensate trap in a furnace primarily serves to manage water that condenses as a result of the combustion process, particularly in high-efficiency furnaces that operate at lower temperatures. The trap captures this excess moisture and prevents it from leaking into the vent system. If water were to enter the vent system, it could lead to corrosion, blockages, or even improper venting, which poses safety risks. Essentially, the condensate trap ensures that the system operates efficiently by redirecting the collected condensate safely away from operational components, thus maintaining the integrity of the venting system and enhancing overall furnace performance.