What type of motor is commonly used in HVAC fans?

Induction motors are widely used in HVAC fans due to their robust design, reliability, and efficiency. These motors operate on the principle of electromagnetic induction, which allows them to run with minimal maintenance and are capable of handling the varying loads typically encountered in HVAC systems. The simplicity of the design, which includes no brushes or commutator components, contributes to their durability and extended operational life, making them ideal for continuous operation in fan applications.

Additionally, induction motors can easily be paired with variable frequency drives (VFDs) to modulate their speed, helping to optimize energy use in HVAC systems according to demand. This adaptability enhances their performance and efficiency, especially in systems that require different airflow rates based on changing conditions.

While brushless, stepper, and synchronous motors do have their applications, they are less common in standard HVAC fan setups compared to induction motors, which dominate this specific application due to their simplicity and operational effectiveness.