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

If louver free area is not published, which assumed free-area percentages shall be used for combustion-air openings?

Wood louvers 75 percent, metal louvers 25 percent All louvers 10 percent All louvers 100 percent Wood louvers 25 percent, metal louvers 75 percent

Correct Answer:

Wood louvers 25 percent, metal louvers 75 percent

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