What does a "MERV" rating indicate in air filters?

A "MERV" rating, which stands for Minimum Efficiency Reporting Value, specifically measures the effectiveness of an air filter in capturing airborne particles and allergens. This rating system ranges from 1 to 16, with higher numbers indicating greater filtration efficiency. Filters with higher MERV ratings can capture smaller particles, including pollen, dust, mold spores, and pet dander, providing cleaner air and improving indoor air quality.

The concept behind the MERV rating helps consumers and professionals select the appropriate filter for their needs, balancing air quality with factors like filter resistance and airflow. Thus, understanding the MERV rating is crucial for achieving optimal air filtration in heating, ventilation, and air conditioning systems.