The vent termination must be located not less than __________ horizontally from any portion of the roof structure.

The requirement for vent termination to be located not less than 3 feet horizontally from any portion of the roof structure is established to ensure proper functionality and safety of the venting system. This distance helps to prevent any potential obstruction of airflow that could occur if the vent were too close to the roof, which could lead to unwanted backdrafts or hindered exhaust performance.

Maintaining this distance also helps to reduce the potential for odor or harmful gases re-entering the building through openings near the roof. Additionally, it promotes better outdoor air circulation around the vent, fostering efficient dissipation of exhaust and minimizing the risk of fire hazards.

In practical terms, adhering to this 3-foot requirement supports the overall integrity of the ventilation system and ensures compliance with established codes designed to protect building occupants and the environment.