What pressure value is recommended for reporting according to ASTM E3158 - 18?

The recommended pressure value for reporting according to ASTM E3158 - 18 is 75 Pa. This standard specifies the importance of measuring airtightness at a consistent pressure, which helps ensure uniformity in testing results across different buildings and methodologies. Using 75 Pa allows for adequate pressure application to identify air leakage while remaining within a range that reflects typical operational conditions in building performance assessments.

Selecting this specific pressure level allows for direct comparison of airtightness results across multiple buildings and testing scenarios, facilitating a more standardized understanding of building performance against the backdrop of operational limits and expectations in energy efficiency standards.