What is the general air flow equation used in multi-point regression testing?

The general air flow equation used in multi-point regression testing is described as Q = C(∆P)^n. This equation reflects the relationship between airflow (Q) and pressure difference (∆P), where "C" is a constant that represents the flow coefficient and "n" is an exponent that varies depending on the characteristics of the airflow through the building envelope.

In the context of multi-point regression testing, this equation is particularly useful because it allows for the examination of multiple data points to better understand the variable relationships. The exponent "n" can provide insights into how airflow behaves at different pressure levels, which is essential for accurate modeling and effective testing of building airtightness. By using this power relationship, practitioners can create more nuanced models of air leakage that account for non-linear behavior often present in real-world conditions.

This equation is foundational in understanding airflow dynamics in building testing scenarios, making it an important aspect of the training and practice in whole-building airtightness assessments.