Fan Blade 420mm × 148mm, 9mm Bore, Clockwise Rotation - 7010539

Bosta – Fan Blade 420mm × 148mm, 9mm Bore, Clockwise Rotation

This is the genuine Bosta replacement fan blade for the Eco 12 Heat Pump. Measuring 420 mm in diameter with a 148 mm blade width and a 9 mm centre bore, it is engineered for clockwise rotation to draw ambient air efficiently through the heat pump’s evaporator, maintaining optimal heating performance for your pool.

Compatibility

Designed specifically as an OEM replacement part for the Bosta Eco 12 Heat Pump series. Always verify the rotation direction (clockwise when viewed from the front/air-outlet side) and shaft bore size before ordering, as heat pump fan blades are model-specific and interchanging incorrect variants can result in reduced airflow or motor damage.

Why Genuine Matters

A genuine Bosta fan blade is manufactured to exact factory tolerances for blade pitch, balance, and bore fit. Correct blade balance minimises vibration, reduces wear on the fan motor bearings, and ensures consistent, quiet operation — protecting the rest of the heat pump from premature stress.

Installation

Replacement requires access to the fan housing and disconnection of power before any work begins. The 9 mm bore slides onto the motor shaft and is typically secured with a hub nut or set screw. Professional installation by a qualified pool technician or HVAC engineer is strongly recommended to ensure safe, correctly torqued assembly.