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The DURAVENT FSSWWMKI04 FasNSeal insulated kit features a patented built-in mechanical locking band and triple-lipped directional gaskets. Its smooth, clean welds are located 90° from mechanical locking bands for ease of installation. The ½” air space between the inner and outer wall helps reduce clearance to combustibles and creates a heat shield. All components that come in contact with exhaust gases and condensates are silicone free.
This 4" insulated kit is designed for severe weather conditions and includes a wall thimble with termination tee, adjustable 90° elbow, and universal appliance adapter with condensate drain and back draft preventer.
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