Product Description Glasfloss Commercial Grade Z-Line MR-13, Meets Green Building Council Program, Low-Pressure Drop, Commercial Grade with High Efficiency. The Glasfloss Z-Line MR-13 Commercial Grade Pleated filter offers high-efficiency performance with a MERV 13 rating (Minimum Efficiency Rating Value). The MERV 13 filters extract microfine particles (0.3 to 10 microns) from circulating air, meeting Indoor Air Quality requirements. The higher MERV 13 rating allows holding more Micro Dust Particles, Lint, Mold, Pollen, Debris, Dust Mites, Bacteria, and smoke......... FILTER MEDIA:100% Synthetic fibers that are electrostatically charged, made by Kimberly-Clarke USA offers very high MERV rating, low-pressure drop, does not absorb moisture & resist microbial growth........ MERV 13 Test RESULTS:The Glasfloss MR 13 qualifies for LEED points in the Green Building Council program. These filters meet & exceed MERV 13 rating under ANSI/ASHRAE 52.2 test procedures. The Glasfloss filters are classified under UL Standard 900 for flammability requirement and maximum operating temperature limit is 180F(82C).......... V-PLEATS DESIGN: The Glasfloss V-Pleats design increase the surface area of contact with Air Flow hence collect maximum Fine/Micro Dust Particles, Lint, Molds, Bacteria, Pollen and Debris......... FILTER MEDIA SUPPORT:The heavy duty, galvanized, expanded metal reinforcement is laminated to the air exit side by Thermosetting Adhesive to maintain the structural integrity of the radial pleats....... FRAME:A heavy-duty two-piece moisture resistance frame with diagonal & horizontal support members bonded by thermosetting adhesive to the media and seals to the outer edges to avoid the leakage during high-velocity air flow through filter media........ APPLICATIONS: The Glasfloss Z-Line MR 13, MERV 13 (1,2&4 Inches) are a superior choice for Superior Residential & Commercial Buildings, Hospital Operation Theaters, School/Universities, Clean Rooms Environment, Laboratories.