Gas appliances on rooftops must have a clearance from unit to roof edge of how many feet?

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Prepare for the NFPA 54 National Fuel Gas Code Test. Enhance your knowledge with multiple-choice questions and flashcards, complete with hints and detailed explanations. Get exam-ready now!

Multiple Choice

Gas appliances on rooftops must have a clearance from unit to roof edge of how many feet?

Explanation:
Gas appliances placed on rooftops must be set back from the roof edge to create a safe working and operating buffer around the unit. The required setback is six feet. This distance helps protect people and property by reducing the chance that wind-driven gas, vapors, or flame could reach the edge, parapet, or nearby openings, and it provides enough room for safe service, piping, and wiring installation and maintenance around the unit. A smaller setback would offer a weaker protection against wind effects and edge hazards; a larger setback isn’t required by the code.

Gas appliances placed on rooftops must be set back from the roof edge to create a safe working and operating buffer around the unit. The required setback is six feet. This distance helps protect people and property by reducing the chance that wind-driven gas, vapors, or flame could reach the edge, parapet, or nearby openings, and it provides enough room for safe service, piping, and wiring installation and maintenance around the unit. A smaller setback would offer a weaker protection against wind effects and edge hazards; a larger setback isn’t required by the code.

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