What is the significance of friction loss in HVAC piping?

Friction loss in HVAC piping is crucial to consider as it directly affects the efficiency of the system. As air or fluid flows through pipes, it encounters resistance, which reduces its energy and slows its flow. This can lead to decreased efficiency, increased energy costs, and even system failure. Properly sized and installed HVAC piping can minimize friction loss, optimizing airflow and energy usage.