Which air testing standard(s) does not allow for repeated single and two-point tests?

The correct answer indicates that none of the listed air testing standards—ASTM E779, ISO 9972:2015, or USACE 2012—allow for repeated single and two-point tests. Each of these standards has specific methodologies and guidelines for conducting air leakage testing, emphasizing accuracy, consistency, and reliability of results.

ASTM E779 outlines procedures for determining the air leakage rate of a building or dwelling under a specified pressure differential. It is designed to ensure that the test results reflect the actual airtightness of the building and therefore does not permit repeated tests that might compromise the integrity of the data or introduce variability.

ISO 9972:2015 is an international standard that also provides guidelines for air permeability testing of buildings. It focuses on ensuring that tests are completed under controlled conditions to produce valid and reproducible results. Allowing repeated single and two-point tests could lead to discrepancies in air leakage results, which this standard aims to avoid.

USACE 2012, which pertains to testing requirements for the U.S. Army Corps of Engineers, is structured to also preclude repeated testing scenarios that might affect reliability. Therefore, adhering to these protocols promotes consistency in evaluating building performance, supporting the view that repeated tests should not be conducted under