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.
Size | Product No. | Model No. | A - Inner Wall Dia (in) | B - Outer Wall Dia. (in) | C - Length (in) | Installed Length (in) - Flue Outlet | Installed Length (in) - Recessed Outlet |
---|---|---|---|---|---|---|---|
6" | 276249 | 6USP-LPSA | 5 15/16 | 6 | 2 1/2 | 0 | 0 |
7" | 277249 | 7USP-LPSA | 6 15/16 | 7 | 2 1/2 | 0 | 0 |
8" | 278249 | 8USP-LPSA | 7 15/16 | 8 | 2 1/2 | 0 | 0 |