A residential building is equipped with a natural draft venting system for a gas furnace. Which of the following is a requirement for the venting system, according to the 2024 IRC?
- AA minimum vent diameter of 6 inches
- BA minimum vent diameter of 8 inches
- A minimum vent diameter of 10 inches
- DA minimum vent diameter of 12 inches
Exam tip
Check the code for the specific vent diameter requirements for different types of venting systems.
Why C is correct
The 2024 IRC specifies a minimum vent diameter of 10 inches for natural draft venting systems to ensure proper draft and exhaust of the furnace.