An inspector is reviewing the ductwork sizing for a residential building. The ducts are designed to supply air to a room that is 300 square feet. What is the minimum size of the supply duct required according to the 2024 IRC?
- A4 inches
- 6 inches
- C8 inches
- D10 inches
Exam tip
Ductwork sizing is critical for proper air distribution and efficiency.
Why B is correct
The 2024 IRC provides tables for ductwork sizing based on the room area. For a 300 square feet room, the minimum size of the supply duct is 6 inches. Options A, C, and D are incorrect as they do not meet the code requirement.