ICC Commercial Mechanical Practice Exam

Vents must terminate at least how many feet above the highest connected appliance flue collar?

1. 2 feet

2. 5 feet

3. 10 feet

4. 12 feet

The correct answer is: 5 feet

The correct requirement for the termination of vents is that they must terminate at least 5 feet above the highest connected appliance flue collar. This distance is crucial for ensuring that the venting system operates safely and effectively. Having the termination point at least 5 feet above the highest flue collar ensures that the exhaust gases are adequately dispersed above the building's roofline, reducing the risk of backdrafts and preventing the re-entry of harmful gases into the building. This height also accounts for wind effects and helps in maintaining a proper draft to enhance the efficiency of the venting system. Additionally, following this guideline aids in compliance with safety codes and standards, which are designed to protect both the structure and its occupants from potential hazards associated with improper venting of combustion gases.