H Window has been manufacturing windows in America since 1987 for architects, builders and homeowners who demand the very bes ... t 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. read more