... source heatpump heater plastic fans 1. plastic axial fan blade 2. 590x183 fan impeller axial fan blade 590x180 for 5HP air source heatpump plastic fans impeller ... : SpecificationsApplication: HVACR Equipment, Machinery, Air Source Heatpump etc.Function: Ventilation, Cooling, Heating, Air Conditioning, Draft Inducing, Air Refreshing, Air Circulation and ...