Northline Express Simpson Dura-Vent Type B Gas Vent Installation Instructions Manual
Type B Gas VentComplete Venting SolutionsInstallation InstructionsType B GasVent System foruse with natural gas or liquidpropane category I and drafthood equipped appliances andappliances listed to use Type BGas Vent.NorthlineExpress.comhttp://www.northlineexpress.comToll-Free 1-866-667-8454