The PREpleat M13 filter has a low initial resistance and supports achievement of LEED credits by significantly improving Indoor Air Quality (IAQ) and reducing energy consumption. The PREpleat M13 filter provides an initial efficiency of MERV 13 per ASHRAE Standard 52.2 at a resistance of only .20″ w.g. (2″ depth) when operating at airflow velocity of 375 FPM — and only 0.30″ at 500 FPM.


  • High efficiency with low initial resistance
  • 100% synthetic recyclable high-loft media
  • 2-piece heavy-duty die-cut frame
  • Expanded metal backing
  • Double-wall frame
  • Diagonal grid supports for maximum strength