MERV 13+ filters have a pressure drop of 0.45-0.55 inches of water column (wc). This means that it takes more energy to move air through a MERV 13+ filter than it does a MERV 12 filter. The increased pressure drop is due to the larger surface area of the MERV 13+ filter.
There are a few methods you can use to mitigate the pressure drop of MERV 13+ filters:
Choose premium brand MERV 13+ filters, such as Camfil
Install MERV 13+ filters in the supply side of your HVAC system: This will reduce the amount of energy your system uses and help keep the return side of your system clean.
Increase the size of your HVAC system: A larger system will have more capacity to move air through the MERV 13+ filters.
Reduce the number of MERV 13+ filters you use: This will reduce the pressure drop of your system, but it will also reduce the amount of airborne contaminants that are captured.
Learn More About MERV 13 Filters and Pressure Drop