Fundamentals: Furnace Vents And Code Considerations
Nate and Ace have been working to replace an older gas furnace with a more efficient furnace. They have determined that they will use 30 ft of 5-in. Type B venting system for the new Category I appliance (although they have calculated that they technically need 26.5 ft). Ace is perplexed by the two codes that Nate used in determining the length of material needed.
NATE: “Ace, I think we need to discuss a few differences in code interpretations.”