NM CID MM-2 Practice Questions - New Mexico CID MM-2 Natural Gas Fitting Examination Exam

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A closet holds a 60,000 Btu/h draft-hood water heater and an 80,000 Btu/h direct-vent furnace. For indoor combustion-air volume, which input do you use?

140,000 Btu/h, the sum of both nameplates 60,000 Btu/h, because the direct-vent furnace does not use closet air 80,000 Btu/h only Zero; no combustion air is ever required in a closet

Correct Answer:

60,000 Btu/h, because the direct-vent furnace does not use closet air

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