SHANTHI DUCT AIRCOOLER IN PALLADAM A duct air cooler, also known as a ducted evaporative cooler or ducted air cooler, is a type of cooling system that uses evaporation to lower air temperature. It typically consists of a unit that cools air by passing it over water-saturated pads, and then distributes the cooled air through a system of ducts throughout a building. This method is energy-efficient and can be effective in dry, arid climates where humidity levels are low. Unlike traditional air conditioners, duct air coolers don’t use refrigerants, making them more environmentally friendly.