Z-Flex 3" x 35' Stainless Steel Chimney Liner Kit for All Fuels speed-control the outside mounting design engineers

the outside mounting design engineers a maximum free air space allowing uninhibited chimney draft

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Z-Flex 3" x 35' Stainless Steel Chimney Liner Kit for All Fuels speed-control the outside mounting design engineersZ flex is engineered to quickly conduct heat, assisting in a natural draft system. Kit must be insulated for wood burning applications. (US Only). Note: For Use with Natural Draft Appliances. Not intended for use with Category II, III, or IV gas burning appliances as defined by the National Fuel Gas Code, NFPA 54, or other appliances that result in condensation or corrosive acids on the liner of the chimney, or that create positive pressures in the