A blower door test is a machine used to calculate airflow between the interior and exterior of a structure, measure the airtightness of buildings, and identify spots where air is leaking through a building envelope. This test ensures a certain level of energy performance and is often used when a project team is aiming for a performance-based building standard like Passive House, which requires a blower door test result of less than 0.6 air changes per hour at 50 pascals of pressure (ACH 50).

Learn more about blower door tests and how to achieve the results you need. 

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