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ESCO Study set- gas furnaces Test Questions and Answers 100% Solved
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ESCO Study set- gas furnaces Test Questions and Answers 100% Solved Burning one cubic foot of natural gas will produce approximately _____ BTU's ️️900- 1,100 BTU The National Fuel Gas Code classifies a vent system for a condensing furnace as; ️️Category IV what type of draft is use...
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