Whirlpool Freshflow Replacement Air Filter Cartridge - AIR1 (W10311524), 2-Pack Certified for Whirlpool, KitchenAid, Maytag, Amana, and Jenn-Air refrigerators - the Freshflow refrigerator air filter reduces common food odors. The air filter lets air actively pass through the filter, helping neutralize odor and bacteria. It reduces odors 15 times better than baking soda. Replace filter ever 6 months. Works with Whirlpool models: GSS26C4XXB, WSF26D4EXA, WRT571SMYB, WRT771RWYB, WRT779RWYB, WRT579SMYB Instructions: On some models, your refrigerator's accessory packet includes an air filter, which must be installed prior to use. On some models, the air filter is already installed at the factory The air filter reduces the buildup of odors. This helps to maintain a cleaner environment inside the refrigerator. Installing the Air Filter (on some models) The filter should be installed behind the vented door