What type of motor is used to push air through a heat exchanger?

The type of motor typically used to push air through a heat exchanger is the forced draft motor. This motor is specifically designed to move air efficiently and is often used in heating systems, including furnaces and boilers, to ensure that air is forced through the heat exchanger and distributed appropriately within the system.

Forced draft motors help create a strong airflow necessary for the combustion process when dealing with fossil fuel heating systems, and they are essential in maintaining the correct temperature and pressure within the heat exchanger. This type of motor plays a critical role in enhancing the efficiency of the heating process by ensuring optimal air flow and heat transfer.

While induction motors are widely used in many HVAC applications due to their simplicity and reliability, they may not specifically focus on generating the powerful airflow needed in forced draft systems. Variable speed motors can adjust their speed for efficiency but are not exclusively designed to work with heat exchangers in the way that forced draft motors are. Brushless motors, while advanced in their technology and applications, are also not the standard choice for driving air through heat exchangers in traditional heating systems.