◆The no power roof fan use natural wind-driven or air convection of indoor and outdoor temperature difference to push the turbine run, exhausted the not fresh air by centrifugal force and negative pressure.

◆Curved blades are the best results of scientific calculation and it can strictly ensure that no rainwater intrusion.

◆Central axis with fine steps, even under the high speed, the turbine blades never deformed and thus greatly improve the life of the non-powered roof fan

◆Rigid sphere shape structure, permanently lubricated upper and lower ball bearings to ensure long life without maintenance, no need to replace the parts.Cases, the U.S. PEER, UBC, and Japan NSK high-precision bearing system fully closed absolutely excellent quality assurance

◆The sophisticated operation equipment: UBC high-precision bearing system fully closed, highly heat-resistant synthetic grease lubricant bearings that can permanently self-lubricating, no maintenance. Even if wind breeze in less than 2 km, it is also self-operation

◆Green Ventilator: Use of natural wind-driven principles, no use of motor power, to avoid the cost of running electricity-free, non-stop self-turbine ventilator

◆Diameter with a unique angle for a variety of industrial plant light steel contour plate roof, concrete roof can be installed. And does not require support, installation and convenient