For optimal performance, recommended to change at least every 3 months.. Size: 16x25x2 Actual Size: 15-1/2 x 24-1/2 x 1-3/4 Filtration Rating: Merv 10, Comparable to SM/Filtrete MPR rating 600 to 800 or Honeywell FPR rating 5 to 6 Incorporates 100% synthetic fibers which are electrostatically charged
