Allowable Air Leakage Rates
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)
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