According to safety guidelines, how many feet should Type L vent systems be above any portion of the building within 10 feet?

The safety guidelines for Type L vent systems specify that they must extend at least 2 feet above any portion of the building that is within 10 feet. This requirement is in place to ensure that combustion gases are adequately vented away from the building, reducing the risk of backdrafting and ensuring that they disperse safely into the atmosphere. By maintaining this height, it helps in preventing any potential hazards associated with gas fumes entering habitable spaces and also adheres to code regulations that focus on safety in building ventilation systems. This height is particularly significant considering that wind patterns and building structures can influence the flow of gases, making adherence to these guidelines crucial for proper ventilation and safety.