OMD’s double casement windows feature two independently operable sashes, providing enhanced ventilation flexibility and symmetry. The aluminium frames are reinforced with thermal break technology, and the double glazing reduces U-values to as low as 1.5 W/(m²·K). These windows are popular in cold climates like Europe, where energy efficiency is critical, and can be fitted with internal grilles for a classic aesthetic. Patented locking systems ensure security, while the dual-sash design allows for partial or full opening based on user needs.