The present invention relates to an exterior sealed window-mounted fan. The fan is designed to be able to fully seal the intake and exhaust air chambers when the system is not in use. The present invention includes a dual panel frame that can completely seal the exterior portion of the opening from the interior portion. The invention can be left in a window all year long if so desired, and the invention can be sealed close during bad weather or opened during desired weather. Along the top surface of the invention is a grooved notch for stabilizing the unit in place with respect to the window and window frame. The invention includes a plurality of electrical fans. The invention includes a pair of adjustable louvers in for the invention to be used with a plurality of window openings. A system of exterior sliding vents seal the exterior of the dwelling from the interior, and is manually operated by a vent control.