Bath Vent Codes: Difference between revisions
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**Continuous means running 24/7 | **Continuous means running 24/7 | ||
**Code does not stipulate bathroom size. | **Code does not stipulate bathroom size. | ||
*Ducts are very specific - 3" smooth for 50 CFM is required, foil ribbed is not allowed at 50 CFM Table M1506.2 - Not! This is only for whole house systems | |||
**'''Section M1507.2 [https://codes.iccsafe.org/content/IRC2015P3/chapter-15-exhaust-systems] covers local exhaust fans, including bathroom. It stipulates only exhaust rates, not vent material. | |||
**Does vent material matter? | |||
Revision as of 01:18, 16 July 2022
- 1 cfm per square foot. Not. [1]
- Seed Eco-Home Floor 1 has a 5x9 bathroom = 45 sf.
- Not! The code requirement is a minimum of 20 cfm continuous, or 50 cfm intermittent. IRC - [M1507.4] - [2]
- Continuous means running 24/7
- Code does not stipulate bathroom size.
- Ducts are very specific - 3" smooth for 50 CFM is required, foil ribbed is not allowed at 50 CFM Table M1506.2 - Not! This is only for whole house systems
- Section M1507.2 [3] covers local exhaust fans, including bathroom. It stipulates only exhaust rates, not vent material.
- Does vent material matter?