The Zero Sightline 2750 vent is designed to accommodate the desire for fresh air ventilation without the sightline of a conventional inserted aluminum window. It allows the end user all of the benefits of a commercial window without compromising the aesthetics of the building. The window is specifically designed to be inserted into storefronts, window walls, and curtain wall framing; it is not a stand-alone window. The vent is also available in our popular StormMax® hurricane-resistant series.