A blower wheel is a type of impeller that is used to move air or gases in a ventilation or air conditioning system. It is a circular, disc-shaped component that is typically made of metal or plastic and is attached to a shaft that is driven by a motor.  Blower wheels are commonly used in residential and commercial heating, ventilation, and air conditioning (HVAC) systems to move air through the system. They are typically located in the air handler or furnace of the HVAC system, and are powered by a blower motor. The blower wheel is responsible for drawing in air from the surrounding environment and forcing it through the system, and is an essential component for ensuring that the system is able to effectively circulate air throughout the building.  Blower wheels are typically designed to be energy efficient and operate quietly, and are available in a range of sizes and shapes to suit different applications. They may be used in a variety of other applications as well, such as fans, pumps, and blowers.