Genuine Oreck Air Instinct AirInstinct 108 75 100 150 200 HEPA 3 Year Purifier Filter. Part Number: AIR108HPK1 *3 Year Purifier Filter Replacement HEPA Air Filters only for Oreck AirInstinct Models 75/100/150/200 Captures 99.97% Of dust, allergens, pet dander, smoke and pollen at .3 microns from the air that passes through the filter. * Estimated HEPA filter life is three years. Filter life may vary by usage in environment. Replaces filter # AIR108HPK1