- Oregon per 2021 Oregon Energy Efficiency Specialty Code (OEESC) is 0.40 cfm/ft²
- Oregon per ASHRAE 90.1 and/or 2019 Oregon Zero Ready Energy Commercial Code is 0.40 cfm / ft²
- Seattle per 2018 Seattle Energy Code is 0.25 cfm / ft² (commercial) / 5 ACH (residential)
- Washington per 2018 Washington State Energy Code is 0.25 cfm / ft² (commercial) / 5 ACH (residential)
- California per 2019 California Building Energy Efficiency Standards is 0.4 cfm / ft²
- Army Corps of Engineers per USACE Test Protocol for Building Envelope is 0.25 cfm / ft²
Links to these energy code documents are provided below:

2015 Seattle Energy Code

2013 California Building Energy Efficiency Standards

2012 US Department of Energy Air Leakage Guide

2018 Washington State Energy Code

2021 Oregon Zero Energy Ready Commercial Code

2012 USACE Test Protocol for Building Envelope
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