Filter-Monster branded replacement H13 True HEPA replacement filter compatible with Medify MA-14 Air Purifiers. The H13 True HEPA filter captures up to 99.97 percent of particles as small as 0.3 microns including smoke, dust, pollen, pet hair and dander, mold spores, and dust mites. This helps to ensure improved indoor air quality. To ensure effective filtration, it is recommended to replace the HEPA filter every three to four (3-4) months or more often depending on air quality and environmental factors. Included in the package is one (1) replacement filter. Features: MODEL COMPATIBILITY: The Filter-Monster H13 HEPA Air Filter Replacement is compatible with Medify MA-14 Air Purifiers. H13 TRUE HEPA FILTRATION: HEPA filter replacement captures up to 99.97 percent of particles as small as 0.3 microns including smoke, dust, pollen, pet hair and dander, mold spores, and dust mites. Improve the air quality in your home all year round. INTEGRATED CARBON: The Filter-Monster H13 HEPA Air Filter Replacement has integrated carbon that reduces household odors from cooking, cleaning chemicals, and smoke. REPLACEMENT TIME: Depending on air quality environment and usage, it is recommended to replace the HEPA filter every three to four (3-4) months months to help ensure the Medify air purifier is running efficiently. DIMENSIONS: The Filter-Monster Filter-Monster H13 HEPA Air Filter Replacement is compatible with Medify MA-14 Air Purifiers. The air filters approximate dimensions are: 7” x 7” x 6.63”. Included in the package is one (1) replacement filters.