This Crystal® Series 8500 aluminum architectural projected window series features a heavy-duty, high performance frame structure, an innovative polyurethane thermal barrier technology that thermally breaks conductivity of the aluminum frame to substantially reduce thermal transfer from exterior of window to interiors, and “Intercept ULTRA” warm edge glass spacer technology. These integrated features reduce heating and cooling loads on HVAC systems, providing long term energy efficiency and utility savings to property owners. This series is ideal for multi-story commercial projects where high strength structural integrity of the window frames is essential. The heavy-duty frame construction allows for larger expanses of glass that provide unobstructed views. Ergonomically-designed hardwares make this series a popular choice for developers of prestige commercial projects, and upscale residential communities.