ASTM E779 -19: Standard Test Method for Determining Air Leakage Rate by Fan Pressurization

Standard that details a test method measuring air-leakage rates through a building envelope under controlled pressurization and de-pressurization.  This version of the standard was published in the year 2019 and is available for preview and purchase at the reference link.  Other versions of the standard were published in the years 2018, 2010, 2003, and 1999, and are available for preview and purchase at the reference link.