The structure is intended for interiors as a cover for a ship window or porthole. Windows can be used in places with limited space owing to the leaf which opens upward. This window in combination with sound absorbing glass ensures perfect acoustic insulation in areas with a high noise level by reducing its emission outside the unit. Windows can be equipped optionally with assisted opening and closing based on gas springs.

The hardware applied in such windows provides multi-point opening of the leaf. The frame-integrated element used to mask the connecting point between the wall structure or BOHAMET window casing ensures very quick installation, while retaining aesthetic qualities. Inner windows are available as inward or outward opening.

Rw range from 37dB to 41dB depending on glass type.