DuraVent FasNSeal 4" x 18" 316L Stainless Steel Adjustable Vent Length h3.5 Flame display dual mode operates

Flame display dual mode operates with or without heat

A starter collar helps make attaching your heating appliance to an air-cooled chimney simple

There is empty room around the burner assembly

Gas Fireplace Buying Guide Gas fireplaces offer the beauty and realism of “live” dancing flames with all the conveniences of a modern gas appliance

5 lb bag (8x)

DuraVent FasNSeal 4" x 18" 316L Stainless Steel Adjustable Vent Length h3.5 Flame display dual mode operatesAll FasNSeal (single wall) vent lengths and components feature patented built in mechanical locking band and triple lipped directional gaskets. All pipes and components are engineered with smooth clean welds located 90 from mechanical locking bands. This construction feature allows for ease of installation. The air space between the inner and outer wall on FasNSeal W2 helps to reduce the clearance to combustibles in addition to creating a heat shield