The Electrolux EAFCBF PureAdvantage Air Filter helps you control your refrigerator's humidity and keep your groceries fresh longer. It eliminates refrigeration odors instead of hiding them and reduces energy consumption, which saves you money. It's compatible with Electrolux refrigeration products with air filtration, and should be replaced every six to nine months. The Electrolux Pure Advantage Air Filter is tested and certified by ANSI/NSF standards 42 and 53, which test for Chlorine, Chloramine, Bad Tastes and Odors, and Sediment and Lead, Radon, and Trihalomethanes. Your fridge will never stink of onions, garlic, fish or overripe fruits and vegetables again.