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Article discussing the risks that can occur from undercutting bedroom doors to provide return airflow from bedrooms, as well as corrective measures that can be taken to address these risks.
Standard describing two techniques for measuring air leakage rates through a building envelope in buildings that may be configured to a single zone which was published in the year 2022 and is available for preview and purchase at the reference link.
Standard describing a test method measuring air-leakage rates through a building envelope under controlled pressurization and de-pressurization which was published in the year 2019 and is available for preview and purchase at the reference link.