Exam (elaborations)
NATE Gas Heating Exam questions with correct answers
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% Many pre-1992 furnaces have efficiencies around _______. A: 10% B: 4...
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