Nordic Pure 16x28x6 MERV 12 rated pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your workplace or office. 6” air filters are normally limited to commercial HVAC systems, so it would be uncommon for you to need one in your home. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, smog, mold spores and germs from coughing or sneezing are removed. Our treated synthetic filter media prevents the growth of bacteria or mold, resulting in a much healthier living space MERV 12 air filters are comparable to air filters with the MPR rating of 1500-1900, a FPR rating between Red and Blue, and an APR rating between Platinum and Diamond. Particles in indoor air are measured in microns, which are 1/1000 of a millimeter (a human hair is about 70 microns wide). Each Nordic Pure 6” MERV 12 air filter will capture more than 90% of 3.0-10.0 micron contaminants and up to 90% of 1.0-3.0 micron contaminants. This high performance HVAC replacement filter will outperform non-electrostatic fiberglass filters, washable filters, poly disposable filters, and will help keep your air conditioning and heating systems running efficiently, saving you money on utilities and costly maintenance. The effective life of your air filter depends on both the inside and outside conditions in which you work. Nordic Pure air 6” filters have an actual depth that is a fraction of an inch smaller than the nominal size printed on the filter. Please measure your filter for the exact depth and compare it to our actual size to ensure proper fit. We recommend that you change your air filter every 3-6 months to maintain maximum efficiency and indoor air quality.