The Envion 49298 Four Seasons 4-in-1 Air Purifier, Fan, Heater, Humidifier is a versatile and efficient tower unit designed for whole house application. With power source provided by electricity, this sleek silver device offers a range of functions including filtration, ventilation, heating, and humidification. The product, manufactured by ENVION, operates at 1500W power with an evaporative humidification method, making it a reliable option for improving indoor air quality and climate control in your home.