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.
4" Oval:
5" Oval:
6 | 12 | 18 | 24 | 36 | 48 | 60 | |
---|---|---|---|---|---|---|---|
4" oval pipe | • | • | • | • | • | • | • |
5" oval pipe | - | - | • | • | • | • | • |
Model | Size | Dim. A | Dim. B |
---|---|---|---|
4OP__* | 4" | 7 1/16 | 2 7/8 |
5OP__* | 5" | 10 3/4 | 2 7/8 |
* Add length to complete Model Number.
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