Understanding MERV Ratings
MERV ratings are determined by a standard laboratory test measuring how well air filters capture and hold airborne particles of a wide range of sizes. Dust, soot, pollen, smoke, and pet and human dander are a few of the types of particulate pollutants that may be found in indoor air. These particles can range in size from less than 1 micron (or millionth of a meter) to more than 10 microns. Simply put, MERV ratings are determined by what comes out compared to what went into the filter during standardized testing.
When comparing different mechanical filter products, MERV ratings are useful. In general, the higher the MERV rating, the more efficiently the filter initially performs in removing smaller particles. However, because of the smaller pore sizes needed to capture smaller particles, air does not flow as easily through a higher-rated filter. We recommend you take the performance of your HVAC unit into account when choosing which MERV rating is right for you.
MERV Rating Chart
What is Good? MERV 10
- Filters out pollen, dust, dust mites, pet dander, mold spores, auto emissions, and more.
- Captures finer dust and a greater percentage of airborne particles than MERV 10 filters.
- Allergens, dust, pollen, cough and sneeze mist, candle soot, and more.