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Board examines tougher air-leakage testing, higher sampling thresholds
Summary
The board flagged revisions that expand commercial air-leakage testing methods and raise sampling and threshold rules (e.g., the 10,000 sq ft trigger noted in 2021 is increased in some cases to 25,000 sq ft), with exemptions when construction documents and inspections suffice.
Board members reviewed changes to air-leakage compliance in the 2024 draft, which add whole-building and unit-enclosure test methods and clarify unit-sampling protocols for commercial projects. "They have a whole building test method and the reporting, and then they have the dwelling and sleeping unit enclosure method and reporting," one presenter said while walking through the commercial testing sections.
Members noted the threshold for testing in some cases increased from 10,000 to 25,000 square feet, which would reduce testing requirements on smaller projects but could make large projects subject to more rigorous reporting. Staff said registered design professionals or approved agencies could perform inspections and that more detailed definitions would be provided in the ordinance copy the board requested.
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