Inward opening windows with tilt before turn operation. This allows a "tilt" position for secure ventilation and a full 90 degree "turn" operation. Full key operation can restrict for reasons of security . With a water-tightness of class 9A, air permeability class 4 and Wind resistance class C5/B5 these windows are great for all projects. Typical U-values of 1.6W/m2K are achievable.
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