Relion Humidifier Filter WF813, 2 Pack Fits Relion humidifier models RCM832 (RCM-832) Filters with Micro Free Antimicrobial Treatment Specifically designed for use with your humidifier Traps impurities in the water Filter replaces quickly with drop in installation; accommodates a 4-gallon steam output Best used in rooms up to 1200 square feet in size In arid climates or the cold, dry days of winter, owning a humidifier makes an awful lot of sense. A humidifier protects household occupants from static electricity shocks, prevents dry, itchy skin, allows stressed lungs to breathe with more comfort, and infuses the room's environment with needed moisture to furniture, fabrics, and plants for long-lasting health. But for all of these positive attributes, using a humidifier may also produce some nasty and harmful results. If not properly cared for, a humidifier becomes the breeding ground for assorted viruses, bacteria, mildew, and mold. In other words, the soothing moist air exhaled by humidifier might be much more harmful than helpful in the long run. To keep the air clean and amply humidified, it is essential to regularly replace the humidifier's filter, where the impurities often fester. Hamilton Beach recognizes the importance of clean filters by offering this replacement filter from their True Air line.