Toshiba H13 True HEPA Air Purifier for up to 198 Ft , CADR 127 CFM 215 m /h Visible Air Quality: Monitor the air quality in real time with LED display that adjusts as the air becomes cleaner. The LED display will move from red (very unhealthy) to orange (unhealthy) to green (moderate) to blue (good). When the LED turns blue, feel free to turn the unit off to save energy. Healthy Air Matters: Toshiba Air Purifier detects harmful pollutants and auto-adjusts the airflow making it safer to breathe in. 3 Stage Filtration: H13 True HEPA filter and pre-filter work together to remove 99.97% of microscopic allergens and certain germs. Optional UV light sanitizer provides thorough air purification removing airborne viruses.