A turbofan utilizes natural wind power and the temperature difference between indoors and outdoors to create air convection, which drives the turbine to rotate and uses centrifugal force and negative pressure effects to expel stale indoor hot air.

2、 Special energy efficiency brought by special design

1. The curved fan blade is the best result obtained through scientific calculation, which can strictly ensure that rainwater is not allowed to enter during operation. The exhaust efficiency is high, and it can operate lightly and effectively as long as there is a gentle breeze of no less than 0.2 meters or an indoor outdoor temperature difference of more than 0.5 ℃.

2. The central axis is equipped with fine steps, which prevent the turbine blades from deforming during high-speed operation, greatly improving the service life of the ventilation fan. 3. The variable angle neck tube design allows the ventilation fan to be installed freely on slopes ranging from 0-22.5 degrees. The installation process is very simple and can be completed by an average person in about thirty minutes. Fiberglass roof fan

3、 Zero cost operating expenses, objective energy efficiency, economical installation costs, and low maintenance costs.

4、 Application of unpowered fan:

1. Generate air convection and dissipate hot air.

2. Reduce air conditioning load and increase indoor fresh air.

3. Extract moisture, mold, and steam from the roof to keep it dry.

4. Replace heavy-duty electric exhaust fans, reduce bracket costs, save electricity bills, and reduce noise.