Remington Solar 25 Watt Solar-Powered Black Attic Fan Ready to install, one-hour installation Humidistat and Thermostat pre-installed in each fan ($40 value) High quality polycrystalline solar panel with powerful, yet quiet brushless 24V DC motor Sleek hail- and weather-resistant design with tiltable panel Powder coated steel housing, steel mesh, and poly-vinyl (quiet) blades Unbeatable warranty and Texas Windstorm Certified