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.
Flashing - Standard The standard flashing fits flat to 5/12 pitch roof, and is made of double-seamed construction for protection from leakage. For a standard flashing with a 6" skirt, the Model No. reads the size and EFFU or RFFU.
Flashing - Steep Pitch The flashing with a steep pitch fits 6/12 to 12/12 pitch roofs.
Flashing - Tall Cone The flashing with a tall cone fits flat to 1/12 roofs, and is used on flat roofs in snowpacked areas to reduce pressure.
|Standard Model||6" Skirt Model||Steep Pitch Model||Tall Cone Model||Size|