The MERV rating of an air filter indicates its efficiency in trapping particles of varying sizes. The higher the MERV rating, the higher the air filtration capabilities of a particular filter. MERV ratings range from 1 to 20, with 1 being the lowest level of filtration, and 20 being the highest. However, a higher MERV rating often means lower airflow, which can cause the system to work harder and use more energy to do its job. Therefore, it is important to check with your HVAC dealer to make sure that your system can accommodate a higher MERV rated filter.

When choosing an air filter, consider the following questions to determine the appropriate MERV rating for your needs:

• Do you have allergies?
• What is the best filter if you have a pet?
• Will any of these filters make your HVAC system work less efficiently?

In general, the best MERV rating for a home is somewhere between 8-10. These filters will capture a large portion of the airborne particles and improve indoor air quality without making your energy costs rise significantly. However, some people prefer to use filters with a lower MERV rating, such as 7, to avoid restricting airflow and causing strain on the blower. It is important to note that neglecting to change your air filter can cause your HVAC system to work overtime, resulting in higher energy bills.