SHANTHI DUCT AIRCOOLER in Coimbatore A duct air cooler, also known as a ducted evaporative cooler, is an air cooling system that uses the principle of evaporation to cool air. It works by drawing warm air through water-saturated pads, which cools the air through the evaporation process before distributing it through a network of ducts. These systems are often used in larger spaces or commercial settings where traditional air conditioning might be less efficient or more expensive. They are known for being energy-efficient and environmentally friendly compared to conventional air conditioners.