Reviews Description: Unlike a fan that blows hot air, the HAC-100S air cooler cools personal air space significantly more than a regular fan, using about the same amount of power as a light bulb. An air cooler is a cost effective alternative to more expensive portable air conditioners. Great for the home or office because they do not use utilize freon and CFC refrigerants. This Whynter air cooler also incorporates a sophisticated humidifier system that provides a controlled cool mist of healthy, natural humidification. The internal air purifying system activates the carbon filter to capture particulates and then use water to filter dust, pollen and pollutants, trap them in the honeycomb filter and then wash them away.