Coway Airmega AP-1512HH True HEPA Air Purifier with Air Quality Monitoring, Auto Mode, Timer, Filter Indicator, Eco Mode Coway Mighty (AP-1512HH) is designed to accommodate room sizes up to 361 sq.ft (CADR: Dust 246 / Pollen 240 / Smoke 233 cb. ft.). 4 Stage Filtration System (Pre-filter, Deodorization filter, True HEPA filter, Vital Ion) captures and reduces up to 99.97% of particles 0.3 microns in the air, including pollen, pollutants and other allergens. It also reduces volatile organic compounds and reduces odor Pre-filter is washable and permanent, designed to catch larger dust particles, The compact unit helps people with asthma and allergies by capturing airborne particles including dust, pet dander, and mold that may trigger asthma and allergies Pollution sensor communicates indoor air quality in real-time. Brightly colored LED lets you know how clean or dirty your indoor air is every minute of the day. Also features a timer and a filter-lifetime indicator. Energy efficient air purifier with three manual fan speeds plus Auto mode. Auto mode automatically optimizes the fan speed based on the level of indoor air quality. When no pollution is detected for 30 minutes, the fan will automatically stop and enter Eco mode to save energy. Timer feature allows device to run 1/4/8 hours before automatically powering off. Filter replacement indicator checks both Pre-filter and HEPA filter and notifies users when to wash or replace them. 77 W power consumption and quiet operation with noise level range from 24.4 dB to 53.8 dB Won the Best Air Purifier of 2018 at Wirecutter and ranked 1st place at TopTenReviews.