Zola Windows now offers the American Heritage SDH, a high-performance, all-wood simulated double hung window for landmarked and other historic buildings. This replica-quality window has been engineered to include a lower Zola Tilt & Turn and a Fixed upper that provide outstanding performance, all while maintaining the style and proportions of a traditional double hung window. Today’s renovations of historic buildings are becoming increasingly focused on achieving maximum energy efficiency for reduced monthly utilities costs and a minimized carbon footprint. In energy efficient retrofits, air tightness and R-values of the windows become crucial, which cannot be achieved with sliding windows. Double hung windows, which are very common in older buildings, present a major challenge to architects and builders aiming to significantly improve energy efficiency of historic buildings while preserving their architectural heritage. The Zola American Heritage SDH features R-11 glass and triple air seals. At the same time, it maintains the original architectural aesthetic due to its historic style, proportions, and also the clever use of offset glass planes that create the shadow line that is characteristic of a historic double hung window. With its triple seals and top of the line low-iron European glass, the American Heritage SDH offers superior acoustic performance. For increased sound protection, Zola also offers the window with custom asymmetrical glazing, which provides up to 51 decibels (dB) of sound deadening performance. The American Heritage SDH also boasts outstanding visible light transmittance of VT=0.71, allowing for maximum daylighting. Zola’s all-wood American Heritage SDH is available in a variety of furniture-grade species, including FSC-certified pine, oak, and meranti. Photo Credit: Amiaga Architectural Photography