What does the MERV rating system measure?

The MERV rating system measures the efficiency of air filters in capturing particles from the air. MERV stands for Minimum Efficiency Reporting Value, and it provides a standardized way to evaluate the effectiveness of air filters in various HVAC systems. The higher the MERV rating, the more efficient the filter is at trapping smaller particles, such as dust, pollen, pet dander, and mold spores. This information is crucial for ensuring good indoor air quality, as efficient air filters can significantly enhance the performance of heating and cooling systems in both residential and commercial buildings. Choosing filters with appropriate MERV ratings is important for balancing air quality with system efficiency and airflow resistance.