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 = |
---|---|---|---|
14R45 | 14" | 6 5/8" | 6 1/2" |
16R45 | 16" | 7" | 7" |
18R45 | 18" | 7 9/16" | 7 1/2" |
20R45 | 20" | 8 1/2" | 8 5/8" |
22R45 | 22" | 8" | 7 5/8" |
24R45 | 24" | 8 5/8" | 8 5/16" |
26R45 | 26" | 9" | 9" |
28R45 | 28" | 9 1/2" | 9 1/2" |
30R45 | 30" | 10" | 10" |