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Questions to ponder: MERV vs. MRP vs FRP; what is an equivalent air-filter?

Whether you are considering a new air-filtration option that is both scalable for your company and provides your homebuyers better indoor air quality, or you just want to clarify in your homeowner manual what filters will fit the widths of filter racks your company installs while not exceeding the static pressure your HVAC system was designed for, this information may be useful.
There are three commonly used rating systems for air-filters. Two were created by proprietary organizations "3M" and "The Home Depot" and the third was created by the American Society of Heating, Refrigerating and Air Conditioning Engineers. The third system is generally accepted as the domestic and international Industry Standard rating system. 
MERV stands for Minimum Efficiency Reporting Value and rates the filter's ability to capture and retain pollutants and particles. Often a MERV Rating of 8 through 13 or equivalent is referred to by green building certification standards and proponents.
MPR stands for Micro-Particle Performance Rating and rates the manufacturer ("3M") products ability to capture airborne particles less than 1 micron. The number system often starts at 300 and extends to 1900.
FPR stands for Filter Performance Rating and rates the supplier ("The Home Depot, including "Honeywell") products ability to capture and hold pollutants and particles. The rating uses a numbering scale of 4 to 10 and associated color code that is similar to the MERV Rating. 
For equivalencies of rating systems, please refer to the diagram provided by

Air Filter Comparison
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