Plate heat exchangers are highly efficient heat transfer devices widely used for HVAC systems, refrigeration, food processing, chemical industries, and energy recovery applications. Many people ask what does a plate heat exchanger do — its main function is to transfer heat between two fluids through thin corrugated metal plates without mixing them together. A typical unit consists of heat transfer plates, gaskets, frames, and flow connections designed to maximize thermal efficiency in a compact structure. Common types include gasketed, welded, and brazed units. So, what is a brazed plate heat exchanger? It is a compact gasket-free design commonly used in boilers, chillers, and heat pump systems. The advantages of plate heat exchangers include high efficiency, space-saving design, easy maintenance, and lower energy consumption compared with traditional shell and tube systems.