Board examines tougher air-leakage testing, higher sampling thresholds
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.
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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.
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