Vertical sliding windows with panes of glass that provide unobtrusive non-projecting ventilation. In single glazed configurations no horizontal rails are seen.

The standard option is double hung with two panes sliding in one action, or single hung with one pane sliding (generally the bottom) and one pane fixed. A motor-driven single sliding pane option is available with top or bottom pane fixed.

For best overall performance, pair with The AGP System® with Solux-E® or Solux Ultra® low-e glass.