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Master of Climate: The Ultimate HVAC 101 Trivia Challenge
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What is the function of the secondary heat exchanger in a high-efficiency condensing furnace?
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Hint
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⚖️
50-50
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Audience
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A
To heat the outdoor air
B
To extract additional heat by condensing water vapor from combustion gases
C
To filter the fuel
D
To cool the blower motor
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