This HEPA 13 filter has been designed to ensure the best performance of your Electrolux Air Cleaner EAP 150. The clean air that your Air Cleaner releases into your home is a result of filtering incoming air through filters. HEPA 13 filter captures 99. 97% of particles and impurities as small as 0. 3 microns including smoke, dust, pollen, and other allergens. The filter indicator will signal when to replace the HEPA Filter. The replacement period will vary depending on the hours of usage, air quality and location of the unit. The filter will last approximately 1 year. This pack contains 1 HEPA 13 filter with reference : EF 113Carbon filters for your Air Cleaner EAP 150 are available here.