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 - Inner Wall Dia (in) | D - Outer Wall dia. (in) | E - Length (in) | F - Installed Length (in) |
---|---|---|---|---|---|---|---|---|
5" to 6" | 275306 | 5USP-IN6 | 5 | 5 7/8 | 6 | 6 7/8 | 6 1/8 | 4 3/4 |
6" to 7" | 276307 | 6USP-IN7 | 6 | 6 7/8 | 7 | 7 7/8 | 6 1/8 | 4 3/4 |
6" to 8" | 276308 | 6USP-IN8 | 6 | 6 7/8 | 8 | 8 7/8 | 8 1/8 | 6 3/4 |
7" to 8" | 277308 | 7USP-IN8 | 7 | 7 7/8 | 8 | 8 7/8 | 6 1/8 | 4 3/4 |