Solar ventilator and solar powered air modifier

摘要: A ventilator or product dispenser comprises a motor (14), fan (16) and solar cell (12), the (12) being arranged to power (14) which in turn drives when sufficient radiation impinges upon (12). The provides an intermittent but approximately calculable airflow can be used greenhouses. dispersed air freshener insecticide. apparatus may further comprise electric energy storage device is connected receive from unit connectable drive (16). Control circuitry added regulate charging of output thereof.