A boiler firing 30 gal/hr No. 6 oil (Heavy oil) requires 18.5 % excess air for complete combustion. Approximately, how many CFM of combustion air should be supplied ? Note: I don't understend what to do with the 18.5% excess air Note: I've asked this question twice before, but one gave "b)", and the other gave "c)" as the answer a) 450 CFM b) 750 CFM c) 900 CFM d) 1150 CFM

A boiler firing 30 gal/hr No. 6 oil (Heavy oil) requires 18.5 % excess air for complete combustion. Approximately, how many CFM of combustion air should be supplied ? Note: I don't understend what to do with the 18.5% excess air Note: I've asked this question twice before, but one gave "b)", and the other gave "c)" as the answer a) 450 CFM b) 750 CFM c) 900 CFM d) 1150 CFM

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter39: Residential Energy Auditing

Section: Chapter Questions

Problem 15RQ: When performing a combustion efficiency test, digital flue gas will measure what four...

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