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NATE Gas Heating Exam Question and answers correctly solved 2023
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NATE Gas Heating Exam Question and answers correctly solved 2023 Since 1992, the United States Department of Energy has required that all furnaces sold and installed from that date on must have an AFUE of no less than: A: 70% B: 75% C: 78% D: 80% - correct answer C: 78% Man...
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