High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:

High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:

High efficiency furnaces and heaters range in annual fuel utilization efficiency (AFUE) from:




a. 94 - 98%
b. 80 - 98%
c. 70 - 75%
d. 60 - 70%
e. 50 - 60%




Answer: B


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