Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design.
• Provides lateral support for the chimney when installed along vertical walls
• Provides more than 4" of horizontal adjustability to clear obstacles
• Required at 8' or closer intervals to stabilize chimney
• Size 5" to 8" chimney