This product from Symphony is best for large-sized rooms. It has a powerful motor and it works on air blower technology which can throw air to a large distance. It is portable too so it can be easily moved. It comes with Aspen Pads which hold the water for a longer period of time and filter the air and prevent the spread of germs, foul smells, and bacteria. One year of manufacturing warranty is also provided by the company from the date of purchase.