Interpretation #9598
Published October 23, 2026
Original Request
- Code Version
- 2023
- Code
- MECHANIC
- Code Description
- Chapter
- 5
- Section
- 506.3
- Topic
- Makeup Air Ducts
Question
Is it the intent of the code to require rigid duct for makeup/supply air serving a type II hood?
Answer Published 10/13/2026 at 2:00 PM
No, rigid duct is not required for the makeup air. With that said, the duct must be suitable (listed) for the use.
Commentary
None.