The answer to 'heat exchanger or heat exchanger' is that a heat exchanger and a furnace heat exchanger are two different components in a home HVAC system. A heat exchanger is a device used to transfer heat from one medium (such as a fluid or gas) to another, while a furnace heat exchanger is a specific type of heat exchanger found inside a furnace.
A furnace heat exchanger is responsible for transferring heat from the combustion process within the furnace to the air that is then circulated throughout the home. It is a crucial component that ensures the safe and efficient operation of a furnace. On the other hand, a general heat exchanger can be used in various HVAC applications, such as air conditioning systems, water heaters, or industrial processes, to facilitate the transfer of heat between different fluids or gases.