DuraVent DuraLiner 6" Oval Tee and Round Branch With Cap w30.75 Lava Rocks thickness will be

Lava Rocks thickness will be anywhere from 2" to 3"

User Manual for Direct Vent Gravity Furnace

Do SunStar infrared radiant gas heaters have FM certification

resulting in a more realistic fireplace experience

DuraVent DuraLiner 6" Oval Tee and Round Branch With Cap w30.75 Lava Rocks thickness will beDuraLiner ensures safe and efficient venting of heating appliances while protecting the masonry chimney from the damaging effects of flue gas. It is the only factory insulated product with zero zero clearance for high heat wood burning appliances. No need to uncoil flex, insulate a majority of the pipe, or protect the insulation when installing. A smooth inner means less creosote buildup. Installers reduce labor time by 50% or more with DuraLiner. No