H Window has been manufacturing windows in America since 1987 for architects, builders and homeowners who demand the very best in quality, environmental, and energy efficiency. Award winning energy efficient window styles include: Awning, Casement and tilt / turn, Fixed and trap windows, European Lift-n-Slides Curtain Wall, Architectural radius. Window sash rotates a full 180 degrees (Awing feature) and (Tilt-N-Turn feature) opens in for easier cleaning and lower maintenance cost.