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Note: U-value (0.60 – 1.2) indicates thermal transmittance of window. Smaller value equals better thermal insulation.
Inward opening windows are German style wooden or aluclad windows - most common type is tilt-and-turn opening
DK22 inward opening window:
Note: DK22 wooden window can be either 2- or -3-glazed; DK22 aluclad window is 3-glazed.