Condenser fan blades and replacement propellers from Grainger keep air moving to maintain air temperature and proper ventilation. Use replacement fan blades in air conditioner condensers, heat pumps, heat exchangers, unit heaters and power roof ventilators. Swept-design fan blades produce efficient airflow and reduce air conditioning condenser noise. Select the appropriate condenser fan blade or blower fan with options that include two to five blades, and propeller diameters from 10 inches to 28 inches.