SOLAR ROYAL Premium Solar Powered Attic Ventilation Fan SR1806 30W monocrystaline panels, up-to 1700CFM or 2250 sqft. of ventilation capacity, 12 inch/ 5-blade 'TurboPro' styled custom nylon/polymeric blade. Brushless 6-24 VDC motor and thermostat. Patent-pending two piece design for easy installation and maintenance, embedded and adjustable angle solar panel brackets included. Automotive grade ABS main body for superior low-profile design, with all aluminum components, aluminum base and stainless steel fasteners.