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.
Model | Size | Dim A | Dim B | Dim C | Dim D |
---|---|---|---|---|---|
3FSP | 3" | 3-5/8" | 7-1/2" | 3-1/2" | 5-1/2" |
4FSP | 4" | 4-5/8" | 8-1/2" | 4-1/2" | 6-1/2" |
5FSP | 5" | 5-5/8" | 9-1/2" | 5-1/2" | 7-1/2" |
6FSP | 6" | 6-5/8" | 10-1/2" | 6-1/2" | 8-1/2" |
7FSP | 7" | 8-1/8" | 12" | 8" | 10" |
8FSP | 8" | 9-1/8" | 13" | 9" | 11" |