The PowerPure AP03 2-in-1 combination air purifier and humidifier is a convenient air quality improvement appliance designed to improve the health of your household. The air purifier utilizes a high quality HEPA filter for allergen and particle removal and a granulated, honeycomb-designed carbon filter for the reduction of common household odors, VOCs and chemicals. The air purifier function is not only effective in areas up to 400 square feet, it is ideal for a bedroom thanks to its quiet operation. The PowerPure AP03 also offers an ultrasonic humidification function that will quickly increase the humidity level of the air in your room. This is critical for good health during the drier months of the year. We like that the functions are run independent of one another making the AP03 combination air purifier/humidifier a product that you will use all year long.