The Bard HVAC 5151-045BX 4-Blade Condenser Fan 20" DIA is a replacement condenser fan designed for compatible Bard HVAC units. Featuring a 20-inch diameter and four-blade construction, it operates by rotating to move air across the condenser coil, helping dissipate heat from the refrigerant during the cooling process. Commonly used in Bard wall-mounted air conditioning systems and pac... https://www.partshnc.com/5151-045bx-bard-hvac-20-fan-blade-cd-4-blade