Heat exchangers are essential devices used to transfer heat between two or more fluids without mixing them. They are widely applied in industries such as HVAC, power generation, chemical processing, refrigeration, automotive, and food processing. By efficiently managing heat transfer, they help reduce energy consumption, improve system performance, and maintain process safety. Key features of heat exchangers include high thermal efficiency, compact design, durability, and compatibility with different fluids (liquid, gas, or steam). They are available in various types such as plate heat exchangers, shell-and-tube exchangers, air-cooled exchangers, and brazed heat exchangers, each suited to specific applications depending on the required temperature, pressure, and flow conditions.