What is the standard atmospheric pressure at sea level in PSI?

The standard atmospheric pressure at sea level is recognized as 14.7 PSI (pounds per square inch). This value is derived from scientific measurements and is considered a key reference point in various calculations related to HVAC systems, weather, and other atmospheric studies.

Understanding this baseline pressure is critical in HVAC applications, as it influences how systems operate under different conditions. For example, when designing ductwork or selecting equipment, engineers need to account for this standard pressure to ensure efficient operation and proper airflow.

In HVAC calculations, knowing that standard atmospheric pressure is 14.7 PSI ensures that pressure drops, fan performance, and system balance can be accurately assessed and designed.