The MaxxFan Deluxe is the only complete RV ventilation system that incorporates a vent, fan and rain shield in a single all in one unit. Twin lifting arms, no more lid fluttering in high winds or when driving. Features a powerful, fuse protected, Long life, sealed ball bearing, 12 volt fan motor and a 12″ 10-blade fan. Flush mounted, easy to clean keypad controls fan speed, thermostat, air intake and/or exhaust functions. Fits all standard 14″ x 14″ roof openings, all mounting screws and hardware included. Roof sealant must be purchased separately.