While the highest MERV ratings are the most effective for air quality, they can harm your HVAC system. A higher MERV rating means a higher resistance, which means less airflow. ... If the MERV rating on your furnace is too high, it may force your furnace to work too hard and leave it vulnerable to damages.Sep 20, 2019
Can my furnace handle a MERV 13 filter?
The ideal MERV filters for both air filtering and furnace efficiency are 7-13, experts say. These filters can be used without any modifications to your equipment. Your system may handle MERV 14-16 with no discernable stress. However, many residential systems require modifications to pull air through these filters.Mar 20, 2012
What is the highest MERV rating for a 1 filter?
How does the MERV rating system work? Well, MERV ratings range from 1 to 20, with 1 being the lowest level of filtration, and 20 being the highest. Filters that are MERV 16 through 20 are usually only found in hospitals, cleanrooms, and nuclear power plants.