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.
The single-wall appliance connector is sized to fit outlet. Use sheet metal screws for code-approved appliance connection.
Model | Size | A | B |
---|---|---|---|
3FC-AC | 3" | 3 1/2" | 3" |
4FC-AC | 4" | 4 1/2" | 4" |
5FC-AC | 5" | 5 1/2" | 5" |