DuraVent FasNSeal W2 12" 15 Degree 316L Stainless Steel Double Wall Elbow d14.49 What is the difference between

What is the difference between Millivolt and electronic ignition fireplaces

Model 5LAAF Piece/carton 4 Finish Stainless Steel Dimensions 5" (dia

Electric igniter (Battery not included)

This sleek

DuraVent FasNSeal W2 12" 15 Degree 316L Stainless Steel Double Wall Elbow d14.49 What is the difference betweenFasNSeal W2 (double 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