The modern central HVAC system is very efficient. All of the actions, from the heating to the ventilation to the air conditioning, work using many of the same parts. This is because HVAC equipment doesn’t just create and pump out heat or air conditioning out of thin air (pardon the pun). Rather, it uses the transfer of thermal energy to change the temperature, and a device called the heat exchanger makes this temperature transfer happen. How Does The Heat Exchanger Work? In spite of its name, the heat exchanger is an important part of both the cooling and heating. Heat naturally moves from areas of high temperature to areas of low temperature, and the heat exchanger is in place to reverse this process to either cool or heat your home. It works by transferring thermal energy from one medium to another through coils in the system. Heat exchangers use combustion gases to heat the air or a cold fluid to cool it. A heat exchanger in an HVAC system uses conduction to transfer heat. Thi