Envion FS200 Four Seasons Air Purifier, Heater, Fan & Humidifier 4-in-1: TRUE HEPA AIR PURIFIER, CERAMIC HEATER, FAN &amp; HUMIDIFIER REMOVES mold, smoke, germs, bacteria, viruses, common allergens, pet dander &amp; odor from the air in your home CLEANS the air in medium to large size rooms up to 3x in one hour POWERFUL FAN operates independently of heater/humidifier for cool breeze in warmer months. MULTIPLE FUNCTIONS and setting can be used simultaneously to allow you to adjust temperature and humidity to your comfort level