Gas Heat ESCO Practice Exam

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What volume of flue gas is produced from a Natural Gas furnace with a draft diverter?

30 cu ft.
40 cu ft.
50 cu ft.
60 cu ft.

The correct answer is: 30 cu ft.

To determine the volume of flue gas produced by a natural gas furnace equipped with a draft diverter, it is essential to understand the typical combustion process and the characteristics of the furnace. Natural gas combustion typically produces a specific amount of flue gas for a given input of gas. On average, a natural gas furnace produces about 30 cubic feet of flue gas for every therm of natural gas consumed. Since a draft diverter helps direct the flue gases safely outside, it maintains the efficiency of the combustion process, which aligns with this typical output. That's why the volume of 30 cubic feet is consistent with standard data regarding flue gases produced from such systems. The other volume options, although relevant in different contexts, do not match the standard output you would expect from a natural gas furnace with a draft diverter. It's crucial to refer to reliable industry standards when determining the expected outputs of heating appliances like furnaces.