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Low-U-value aluminum casement windows are a type of building window and door product that achieves high efficiency and energy saving by optimizing thermal insulation performance. Its U value (heat transfer coefficient) is usually less than 0.3 W/(m²·K), which is much lower than the 1.8-3.0 W/(m²·K) of ordinary aluminum alloy windows.Thermal Break Aluminum Casement Windows Technical Features and DataUltra-low U valueUsing thermal-break aluminum alloy profiles (PA66 nylon insulation strips) and three-glass two-chamber Low-E glass (6mm+12A+6mm+12A+6mm), the U value can be as low as 0.24 W/(m²·K). For example, the actual U value of a certain brand product is 0.26 W/(m²·K), which is more than 70% energy-saving compared to ordinary single-layer glass windows.High Solar Heat Gain Coefficient (SHGC) ControlThrough Low-E coating technology, the SHGC value can be adjusted from 0.14 to 0.6. For example, areas with high heating demand in winter can choose glass with SHGC 0.6, while areas with hot…

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