ESCO Air Conditioning Practice Exam 2026 – Complete Study Resource

Installing high-efficiency air filters is a well-established method for improving indoor air quality in air conditioning systems. These filters are designed to capture smaller particles, allergens, and pollutants that can negatively affect the air quality within a space. High-efficiency filters often meet standards such as MERV (Minimum Efficiency Reporting Value) ratings that indicate their ability to trap particles ranging from dust and pollen to mold spores and pet dander.

When these filters are installed and routinely maintained or replaced, they can significantly reduce the number of airborne pollutants in a given environment, leading to a healthier indoor atmosphere. Improved air quality not only enhances comfort but is also essential for the health of occupants, especially those with allergies or respiratory issues.

In contrast, reducing airflow can lead to stagnant air and higher concentrations of pollutants, while increasing humidity levels can promote the growth of mold and mildew. Using older refrigerants does not directly relate to air quality and can even pose health risks due to their environmental impact and potential for leakage. Therefore, the installation of high-efficiency air filters stands out as the most effective method for enhancing indoor air quality in air conditioning systems.