Ratings: MERV vs MPR vs FPR

MERV MPR FPR
Nordic Pure MERV 7
600 5
Nordic Pure MERV 8 800 6
Nordic Pure MERV 10
900-1000 7
Nordic Pure MERV 11 1000-1200 8
Nordic Pure MERV 12 1500-1900 9
Nordic Pure MERV 13 2200-2400 10
Nordic Pure MERV 14 2800  
Nordic Pure MERV 15 2800