The MERV rating, which stands for Minimum Efficiency Reporting Value, is a system that measures the effectiveness of air filters. The ratings range from 1 to 20, with higher numbers indicating a greater ability to capture smaller particles. Here’s a breakdown of what different MERV ratings generally mean:

● MERV 1-4: Basic residential filters that capture large particles like dust mites, pollen, and carpet fibers. These are often used in window air conditioning units or for basic pre-filtration.

● MERV 5-8: Improved residential filters and better commercial filters. They can capture smaller particles like mold spores, pet dander, and dust mites. Commonly used in typical residential and commercial buildings.

● MERV 9-12: Superior residential filters and high-quality commercial filters. They can trap smaller particles, including some bacteria and smaller mold spores. Suitable for homes with pets or people with allergies.

● MERV 13-16: Filters in this range can capture very small particles such as bacteria, tobacco smoke, and sneeze droplets. These are often used in hospitals, general surgery rooms, and superior commercial buildings.

● MERV 17-20: High-efficiency particulate air (HEPA) filters fall into this category. They are capable of trapping the smallest particles, including many viruses, and are used in clean rooms, pharmaceutical manufacturing, and environments where air quality is critical.

The higher the MERV ratings, the more particles and contaminants the filter can capture, but this also usually means the filter may restrict airflow more than lower-rated filters. It’s important to choose a filter with a MERV rating appropriate for your HVAC system and your specific air quality needs. For help choosing a filter and ensuring a healthy HVAC system, choose Advanced Air Duct Cleaning. Reach out today for a free quote.