Powerful OPT HVLS Fan

Powerful OPT HVLS Fan resemble the natural breeze, it will generate the massive and smooth airflow. It can replace the AC and make people feel the 5-8 degrees temperature cooling down in Summer. Combine with the AC system, it reduces the costs. In the winter, the reverse mode can be switched to push down the warm air on the roof, which achieves the effect of adjusting the temperature.