Airflow through a blower door at 50 Pascals of pressure is represented by which measure?

The correct measure for airflow through a blower door at 50 Pascals of pressure is expressed in cubic feet per minute, denoted as CFM50. This terminology is widely used in the field of building performance and energy efficiency to quantify the amount of air that leaks in and out of the building envelope under controlled conditions.

Blower door tests are specifically conducted to determine the airtightness of a building by creating a slight pressure difference between the inside and outside, usually set at 50 Pascals. The CFM50 value indicates how many cubic feet of air pass through the blower door in one minute at this specific pressure, making it a standard measure for assessing ventilation and air leakage.

Other units of airflow, such as liters per second or various measures associated with flow rate at different pressure levels, are not represented in this specific context. Thus, CFM50 is the definitive measure used for evaluating airflow in blower door tests, and its widespread acceptance in the industry makes it essential for assessing the energy efficiency of multifamily buildings.