Application scope of environmentally friendly fans: generating air convection and dissipating hot air; Reduce indoor temperature and increase indoor fresh air; Reduce air conditioning load and increase cooling efficiency; Extract moisture, mold, and steam from the roof to keep it dry and dry; Replacing heavy-duty electric exhaust fans, reducing bracket costs, saving electricity bills, and reducing noise; Suitable for ventilation, ventilation, and ventilation of factories, warehouses, rooftops of buildings, villas, patios, flower houses, livestock breeding, mining tunnels, and all rooftops.