Under 2024 IRC Table M1505.5, what minimum local exhaust capacity applies to a bathroom fan operating intermittently?
- 50 cubic feet per minute
- B75 cubic feet per minute
- C100 cubic feet per minute
- D125 cubic feet per minute
Where to look it up
https://codes.iccsafe.org/content/IRC2024P1/chapter-15-exhaust-systems
Why A is correct
Use the bathroom row and intermittent mode in Table M1505.5: 50 cfm. Continuous operation has a different rate; 100 cfm is the kitchen intermittent entry. Source: https://codes.iccsafe.org/content/IRC2024P1/chapter-15-exhaust-systems