What is the minimum height of a main vent that is used on a 7/12 pitched roof?

The minimum height of a main vent on a 7/12 pitched roof is 1 foot 3 inches. This measurement is critical in ensuring that the vent adequately projects above the roofline, allowing for the effective escape of gases and reducing the risk of backdrafts into the building.

When determining the height of the vent, factors such as the pitch of the roof and the potential for snow accumulation or other obstructions must be considered. A 7/12 pitch is relatively steep, and the height specification ensures that the vent remains effective even under varying weather conditions. Additionally, the height helps to maintain proper ventilation in the system and adheres to plumbing codes that regulate clearances for vent systems.

Other options may not meet code requirements or effective ventilation standards for such a pitch, highlighting the importance of using the correct minimum height.