The Lennox 21708 is a 10" x 8" blower wheel with a 1/2" bore designed to deliver efficient air movement in HVAC systems. It attaches to the blower motor shaft and rotates to draw air into the housing, creating consistent airflow through the system. Commonly used in furnaces, air handlers, and packaged units, it supports proper air circulation and temperature control. This component im... https://www.partshnc.com/lennox-21708-blower-wheel