Metal-Fab Air-Cooled Temp/Guard 8" x 18" Chimney Length Pipe w33 R value per 1/2 inch

R value per 1/2 inch sheet of Micore is 1

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Metal-Fab Air-Cooled Temp/Guard 8" x 18" Chimney Length Pipe w33 R value per 1/2 inchDouble wall factory built Chimney Systems for use with gas, liquid, and solid fuel fired residential type and building heating appliances in accordance with the Standards for Chimneys, Fireplaces, Vents and Solid Fuel Burning Appliances, NFPA 211, BOCA National Mechanical Code, Standard Mechanical Code and the Uniform Mechanical Code. Air cooled Temp Guard products are tested and listed to UL 103 for continuous operating temperatures up to 1000F and