Sierra Flame by Amantii 5 Piece Duravent Through the Roof Kit With 4" Inner Diameter for Gas Fireplaces h38.625 The Zero clearance universal firebox

The Zero clearance universal firebox is also available without Oak Logs in 36" size Model ZCBB and 42" size Model 42ZCBB

or swell when exposed to water

modeled from real-world samples

For 10” use DuraBlack Slip Connector to attach DuraBlack to the support box

Napoleon DHMTP6274 Ducted Heat Management Termination Plates for 62/74 Vector Series Fireplaces

Sierra Flame by Amantii 5 Piece Duravent Through the Roof Kit With 4" Inner Diameter for Gas Fireplaces h38.625 The Zero clearance universal fireboxSierra Flame by Amantii 5 Piece DuraVent Through The Roof Kit with 4 Inch Inner Diameter for Gas Fireplaces. What's Included Duravent Through the Roof Kit Features 5 piece kit Designed for use with Sierra Flame fireplaces This unit requires venting pipe with an inner diameter of 4 Inch Includes high wind cap, 36" hard pipe, storm collar, adaptor, and flashing Specifications Inner Diameter: 4 Outer Diameter: 6 Clearance to Combustibles: 3 Inches