What does cubic feet per minute provided by windows measure?

Cubic feet per minute (CFM) provided by windows measures the air volume supplied through those windows. This figure indicates how much outdoor air can enter a space via the windows, which can significantly impact indoor air quality and ventilation rates. Understanding this measurement is essential for ensuring proper ventilation within a building, as it helps assess how effectively fresh air can replace stale air, contributing to a healthier indoor environment.

The measurement of CFM through windows can also aid in evaluating a building's overall energy performance, particularly concerning natural ventilation strategies. It is crucial for architects and engineers to consider this factor when designing spaces that rely on windows for natural airflow, as it affects both comfort levels and energy efficiency in heating and cooling systems.