What crucial step follows the installation of a new HVAC system?

Conducting a performance test to ensure proper operation is a crucial step that follows the installation of a new HVAC system. This testing is essential to verify that the system is functioning correctly and efficiently. During the performance test, technicians check various parameters such as airflow, temperature differentials, and pressure to ensure the system meets the manufacturer's specifications and provides the desired comfort levels in a building.

This phase is critical for identifying any issues that may need to be addressed before the system goes into full operation. Performance tests also confirm that the installation was carried out correctly, including proper ventilation and refrigerant levels, which are vital for the system’s longevity and efficiency.

Other steps, such as calibrating the thermostat settings, painting the external unit, and sealing duct connections, are important but not as fundamental to the initial operation of the system. Calibration may enhance user experience, painting can offer protection, and sealing ducts is beneficial for efficiency, but the initial verification of operation through a performance test is the most immediate priority after installation.