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What are the Clearances to Combustibles?

April 26, 2017clearances combustibles

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What are the Clearances to Combustibles?

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Clearance to Combustibles – Single Wall Rated Operating Temperature, °F Minimum Clearance Enclosed Minimum Clearance Unenclosed Horizontal Vertical Horizontal Vertical 3″ – 4″ 300°F Side: 8″ Top: 12″ Bottom: 4″ 4″ 1″ 1″ 480°F 4″ 3″ 1″ 5″ – 16″ 300°F Noncombustible Enclosure 3″ 3″ 480°F 3″ 3″ Clearance to Combustibles – Double Wall Rated Operating Temperature, °F Minimum Clearance Enclosed Minimum Clearance Unenclosed Horizontal Vertical Horizontal Vertical 3″ – 4″ 300°F 3″ 1″ 1″ 1″ 400°F 6″ 1″ 3″ 1″ 480°F 6″ 4″ 3″ 1″ 5″ – 16″ 300°F 3″ 1″ 1″ 1″ 400°F 6″ 1″ 3″ 1″ 480°F 6″ 6″ 3″ 3″