DC Plumber Practice Questions - District Of Columbia Journeyman Plumber License Exam

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Per the IFGC, what is the required combustion air opening size for a gas appliance in a confined space using outdoor air?

1 square inch per 1,000 BTU/hr 1 square inch per 2,000 BTU/hr for each opening (two required) 1 square inch per 4,000 BTU/hr for direct-vent appliances No openings required for sealed combustion appliances

Correct Answer:

No openings required for sealed combustion appliances

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