SC Heating Practice Questions - South Carolina Heating Contractor Examination Exam

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Unless an exception applies, an attic containing a furnace must have a passageway not less than which dimensions, and not more than 20 feet long measured along the centerline?

24 inches high by 18 inches wide, with a 16-by-24-inch opening 30 inches high by 22 inches wide, with a clear access opening not less than 20 inches by 30 inches 36 inches high by 36 inches wide, with a 30-by-30-inch opening 48 inches high by 24 inches wide, with a 22-by-22-inch opening

Correct Answer:

30 inches high by 22 inches wide, with a clear access opening not less than 20 inches by 30 inches

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