Exam (elaborations)
NATE Gas Heating Exam with Complete Solutions
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NATE Gas Heating Exam with Complete Solutions 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% C: 78% Many pre-1992 furnaces have efficiencies around ______...
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