Genuine Electrolux EL049 HEPA Air Cleaner Filters for ELAP40D8PW and ELAP45D8PW, 1 HEPA filter Contains 1 HEPA Filter Fits Electrolux Pure Oxygen Allergy 400 and 450 Air Cleaner, ELAP40D8PW and ELAP45DPW Replaces EL049 Filter Replace HEPA filter every 12 months for optimum performance