Type B Gas Vents
For Listed Category I Appliances, Draft Hood-Equipped Appliances, or Appliances Listed for use with Type B Gas Vent. See Appliance Installation & Operating Instructions for clarification.
Prefabricated system listed to UL-441 Standard for Gas Vents made with aluminum alloy inner liner, insulating air space, and galvanized steel or galvalume outer jacket. Vent shall be designed for maximum 480°F and negative pressures only.
Complete with: factory appliance flue connector, elbows, gas vent supports, roof flashings, and termination. All items specifically as specified by Appliance and Gas Vent manufacturers installation instructions.
Submit AutoCAD Drawings with Draft Calculations showing that the vent system is in complete compliance with both the Appliance and Vent manufacturers’ installation instructions.