Designed with both solar fan and louvered vent in one unit, our second generation WM series wall mount fan offers a complete solar powered ventilation solution. Equipped with a high-efficiency monocrystalline 40 watt remote mounted solar panel for installation flexibility, the WM model series offers both superior performance and durability, delivering up to 1875 CFM of airflow performance under full sun exposure. In addition to industry leading performance, the WM model series fans also come with an industry leading LIFETIME WARRANTY.