Section 408.30533. Frost closure.

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Section P3103.2 of the code is amended to read as follows:

P3103.2. Frost closure. To prevent frost closure, every vent extension through a roof shall be not less than 3 inches (76 mm) in diameter. Any increase in the size of the vent shall be made inside the building with a minimum of 1 foot (305 mm) below the roof or inside the wall.

History: 2001 AACS.

                    
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