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 all-pitch flashing is installed either parallel or perpendicular to the roof ridge, and fits roof pitches flat to 5/12.
Model | Size |
---|---|
40F | 4" |
50F | 5" |
60F | 6" |