The key to whether it’s a good number or not is how well it fits in with the total pressure drop in the system compared to what’s allowed (the total external static pressure, or TESP). More on that in a future article. A simple rule of thumb for low pressure drop across a high...
If you’re looking at air filters rated for MPR compared to air filters rated by the MERV filter rating system, you can reference this chart below: MPR 600 is equal to MERV Rating 8 MPR 1000 is equal to MERV Rating 8 MPR 1200+ is equal to MERV Rating 11 MPR 1500 is equal to MERV...