Nordic Pure 16x25x5 Goodman Replacement MERV 12 rated pleated AC air filters are unique because of the actual size of the filter compared to the nominal size. Typically, a 5” filter is actually a fraction of an inch smaller, while these filters are larger at 5 1/4”. Other commonly known systems that use this filter size are Amana, Five Seasons, and Totaline. Please note that these name brands are not a comprehensive list; you may have a different system with the same measurements, so always measure your filter’s housing to ensure you order the proper fit. 5” Goodman Replacement MERV 12 rated filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. 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 filter media prevents the growth of bacteria or mold, resulting in a 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; for scale, a human hair is about 70 microns wide. Each Nordic Pure 5” 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 the inside and outside conditions in which you live. We recommend that you change your air filter every 30-90 days to maintain maximum efficiency and indoor air quality.