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. The System Design and Installation Guide is an additional resource.
For use in pairs to permit chimney to “go around” joists, rafters or other projections. Add chimney sections between offsets to produce additional offset. Offsets are available with a stainless steel outer wall for corrosive environments, Model HSS.
|6HS or HSS-015||15||4 3/8"||4 3/4"|
|8HS or HSS-015||15||5"||5 1/2"|
|6HS or HSS-030||30||4 3/8"||4 3/4"|