The HoMedics® True HEPA Air Cleaner captures & removes 99.97% of airborne contaminants, giving you cleaner, fresher air for the whole family. Captures & removes 99.97% of airborne contaminants. Covers approximately 192 square feet- perfect for medium to large rooms. Easy to clean filter Simply vacuum to clean, lasts up to 18 months Clean filter indicator light Let's you know when to check the filter Covers approximately 192 square feet Perfect for medium to large rooms 12 hour auto off timerFor cleaner air for your home choose the HoMedics® True HEPA Air Cleaner (100 CADR) with long-lasting True HEPA filtration that captures and removes 99.97% of airborne particles including dust, pollen, pet dander and hair, and smoke. HoMedics® This True HEPA Air Cleaner features three cleaning speed options to meet your purification needs and lists Clean Air Delivery Rates: Smoke: 124 Dust: 139 Pollen 156. When it comes to filter changes, don't worry, this HoMedics® Air Cleaner will remind you.