SHANTHI AIRCOOLER IN COIMBATORE Ducts are similar to conduits which are channels or passages through which air is either delivered or removed. Duct Air Coolers ensure the supply of fresh cool air which is conditioned through the evaporative cooling technology, and also remove the stale air from the room or area. The conduits or the air passage also are effective in ventilation and these Duct Coolers can also serve the twin purpose of providing fresh air ventilation inside the room or space during the cold weather or the winters.