Leak Detection: Duct pressure testing helps identify any leaks in the duct system. Leaks can cause air loss, reducing the efficiency of the HVAC system and increasing energy consumption. By identifying and sealing leaks, the system can deliver the required airflows to conditioned spaces more effectively.

System Efficiency: If ducts are not properly sealed or there is a pressure imbalance, the system may need to work harder to maintain desired temperatures, leading to increased energy use and wear on equipment. Proper pressure testing ensures that the system is working optimally.

Ensuring Design Specifications: HVAC systems are designed to meet specific airflow requirements. Pressure testing ensures that the ductwork and system are performing according to design, which is critical for maintaining comfort and indoor air quality.

Regulatory Compliance: Many building codes and standards, such as those from ASHRAE, require duct pressure testing as part of the overall HVAC system commissioning process to ensure energy efficiency and proper system performance.

Balanced Airflow: Proper pressure testing ensures that air is evenly distributed throughout the building. Without this testing, some areas might receive too much or too little air, causing discomfort and potential system inefficiencies.