Product Name: Ruitai Feng Shui Cold Air Conditioner RTF-20A (Bottom Air) Product Features: The core cooling component of Ruitai Feng evaporative air cooler is the high-efficiency evaporative wet curtain - "pure natural multi-layer corrugated fiber composite". By using a fan to blow air indoors, the outdoor air flows through a wet curtain soaked in water, and the air comes into full contact with moisture while absorbing sensible heat from the air, thereby achieving the purpose of cooling, ventilation, dust removal, and increasing fresh air. Suitable locations: factory workshops, canteens, dormitories, storage centers, shopping malls, internet cafes, schools, gyms, car dealerships, stations, outdoor activity areas, and animal husbandry.