Which standard specifically addresses air leakage rates in buildings?

The standard that specifically addresses air leakage rates in buildings is ASTM E779. This standard is widely recognized and provides a standardized method for determining the air leakage rate of a building's envelope using a pressurization method. It is essential for assessing energy efficiency and ensuring that buildings meet specific performance criteria, particularly in the context of LEED certification, where controlling air leakage can significantly impact overall energy use and indoor environmental quality.

The importance of air leakage rates cannot be understated, as they directly affect heating and cooling loads, comfort levels, and indoor air quality. By following ASTM E779, builders and architects can create more energy-efficient structures that align with LEED's sustainability goals.

Other standards mentioned, such as ASTM E1827, deal with more specific aspects of air barrier assemblies and testing methods, while CEN 1779 relates to air permeability but is more focused on European contexts. RESNET Standards are related to energy efficiency ratings for residential buildings but are not specifically focused on measuring air leakage in the same manner. Thus, ASTM E779 stands out as the definitive standard for addressing air leakage rates.