Combine Lift Out and Hinged units in a variety of different configurations. Combined secondary glazing units (divided by a dedicated transom / mullion) can be made up within one outerframe.
Combination secondary glazing is most suited for copying an existing combination window. For example; a bay window consisting of two top hung over fixed lite windows could be treated with a secondary glazing unit consisting of a two top hung windows to line through an match the existing window, over a lift out panel.
... Combination units are designed to save on fitting time and provide slimmer sight-lines, making it quick and easy to align the secondary glazing with the prime window...