Venetian Window with Solid Mullion and Mid Single Hung

When three pairs of sashes are used, the middle pair wider than the others it is called a Venetian Window The vertical divisions between the adjacent pairs of sashes are called mullions. If the middle pair of sashes is only required to slide, the mullions may be solid from 1 ¼ “ to 2” thick with the sash-cord conducted by means of additional pulleys to the boxes which are at the outer edges of the frame.

If one sash only slides and the other is fixed in the frame the window is single hung sash and frame window. When both sashes slide and are balanced by weights, the window is known as a double hung sash and frame window.