What characterizes single-point testing in air leakage assessment?

Single-point testing in air leakage assessment involves taking multiple measurements at a specific pressure. This method focuses on evaluating the air leakage of a building at one chosen pressure level, typically during the application of a fan pressurization or depressurization test. By collecting data at this single pressure point, it becomes possible to understand how the building performs concerning air tightness under controlled conditions.

This approach is useful for obtaining a snapshot of the leakage characteristics of the building envelope without the need for extensive testing at various pressure differentials. It allows for quicker assessments and can be a practical method in scenarios where time or resources are limited. By concentrating on one pressure point, the data gathered can be directly used for various calculations or diagnostic evaluations related to the building’s performance regarding air leakage.

The other choices present different aspects of testing methodologies or assumptions that do not specifically describe the characteristics of single-point testing. For instance, taking measurements at multiple pressure points is indicative of another testing strategy focused on creating a pressure curve or map of the building's airtightness. Similarly, only measuring at a low pressure point does not encompass the full practice of single-point testing, which can occur at various pressures. Assuming flow exponents are constant pertains to the mathematical modeling of airflow through building materials