In HVAC systems, what is the primary role of a compressor?

The primary role of a compressor in HVAC systems is to compress and circulate the refrigerant. This is essential for the refrigeration cycle, which involves the absorption and release of heat to cool or heat an environment. The compressor takes in low-pressure refrigerant gas from the evaporator and compresses it into a high-pressure gas, which then moves to the condenser. This process not only raises the pressure and temperature of the refrigerant but also ensures that it flows properly through the system, facilitating heat exchange processes.

Understanding this function highlights the importance of the compressor as a vital component that directly affects the efficiency and performance of the entire HVAC system. The other options focus on different functions that are performed by other components within the HVAC system, such as cooling (handled by the evaporator), regulating airflow (managed by blowers and ducts), and filtering air (conducted by filters).