Allowable Air Leakage Rates

Oregon per 2011 Oregon REACH Code is 0.25 cfm / ft²

Seattle per 2012 Seattle Energy Code is 0.4 cfm / ft²

Washington per 2012 Washington State Energy Code is 0.4 cfm / ft²

California per 2013 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:

  2012 Seattle Energy Code

2012 Seattle Energy Code

  2013 California Building Energy Efficiency Standards

2013 California Building Energy Efficiency Standards

  2012 US Department of Energy Air Leakage Guide

2012 US Department of Energy Air Leakage Guide

  2012 Washington State Energy Code

2012 Washington State Energy Code

  2011 Oregon REACH Code

2011 Oregon REACH Code

  2012 USACE Test Protocol for Building Envelope

2012 USACE Test Protocol for Building Envelope