Maintaining good air quality in your home or office is essential for your health and well-being. One of the key factors in achieving this is choosing the right air filter for your HVAC system. With so many options available, it can be difficult to know where to start. Continue reading to know more about the science behind MERV ratings and discuss how to choose the right air filter for your HVAC system. Custom air filters are also an option to ensure the perfect fit for your HVAC system.

The Science Behind MERV Ratings: How They Work

The grading system known as MERV, or Minimum Efficiency Reporting Value, is used to assess the efficiency of air filters. The MERV rating, which runs from 1 to 20, describes how well a filter can capture particles of various sizes. The filter is more effective at catching tiny particles the higher its MERV rating. The filter’s capacity to catch particles with sizes ranging from 0.3 to 10 microns determines its MERV rating.

Filters with lower MERV ratings are typically less expensive and have a coarser filter media. These filters are generally used in residential systems and are effective at capturing larger particles like dust and pet hair. Filters with MERV ratings between 7 and 13 are considered to be medium-efficiency filters and are typically used in commercial buildings. They are effective at capturing smaller particles like pollen and mold spores. Filters with MERV ratings between 14 and 20 are high-efficiency filters and are used in hospitals, clean rooms, and other specialized settings. These filters can capture very small particles like bacteria and viruses.

It is also important to note that MERV ratings are not the only factor to consider when choosing an air filter. Other factors like the type of filter media, the size of the filter, and the frequency of filter replacement can also impact filter performance. For example, electrostatic filters use static electricity to attract particles and can be more effective than traditional filters. However, they may also generate ozone, which can be harmful to the environment and human health.

Air Quality and Health: The Importance of Choosing the Right MERV Air Filter

Choosing the right air filter is important for maintaining good indoor air quality, which is linked to overall health and well-being. Air filters with higher MERV ratings can capture smaller particles like bacteria and viruses, which can reduce the spread of illnesses. They are also recommended for homes with pets or people with allergies or respiratory issues, as they can capture pet dander and other allergens.

Custom Air Filters: Finding the Perfect Fit for Your HVAC System

In addition to considering the MERV rating when choosing an air filter, selecting a filter that fits properly in your HVAC system is also important. Air filters come in various sizes, so it’s crucial to choose one compatible with your system. If you’re unsure of what size filter you need, take a look at your existing filter or consult your HVAC system’s manual. Common sizes include 20x25x1 air filters and 19.5×19.5×1 air filters or more.

At Simply Filters , we offer custom air filters that are designed to fit perfectly in your HVAC system. Our filters are available in a wide range of sizes and MERV ratings, so you can find the perfect fit for your needs.


Choosing the right air filter is crucial for maintaining good air quality in your home or office. By understanding MERV ratings and considering factors such as size and compatibility with your HVAC system, you can select an air filter that meets your needs. Remember to maintain your air filter properly in order to ensure optimal performance.


This is a Sponsored Post – the author has requested this post be shared on WE Magazine for Women and we were compensated for sharing.