The biggest factor we find that makes or break the choice of these windows is when we mention cleaning. Sigle hung windows are half the work as its only the one window. Another draw back is 2 window panes can be mixed up top versus bottom or even damaged when removing so single hung is generally the window of choice. If you want “a bigger window” you can always go to a custom or picture window. Single hung windows are ideal for exterior places with high traffic like walways because they open “up” versus “out”.