Air Conditioning Repair Certification (ETI) Practice Exam

Improving airflow in an air conditioning system is crucial for optimal performance and efficiency. Cleaning or replacing the air filters and ducts directly impacts how air moves through the system. Over time, air filters accumulate dirt and debris, which can restrict airflow, leading to higher energy consumption and reduced cooling effectiveness. Regular maintenance of filters ensures a clear path for air, allowing for better circulation throughout the space.

Ducts can also collect dust and blockages, further hampering airflow. By ensuring these components are clean and well-maintained, a technician can significantly enhance the overall performance of the AC system, leading to improved indoor air quality and comfort levels.

The other options, while they may pertain to the system's functioning, do not specifically address airflow improvements. Lubricating the compressor, for instance, relates more to the mechanical operation of the compressor rather than airflow itself. Increasing the refrigerant charge can impact cooling efficiency but does not necessarily improve the movement of air through the system. Installing a larger fan may increase airflow but could lead to other issues like increased noise or energy consumption without addressing the underlying causes of airflow restrictions.