A 3-lite slider has 3 glass panels. The center panel is usually half the size of the total window opening, with each side panel being one-quarter of the total size. However, you can also opt for 3 equally sized window panels. With either configuration, the side panels open horizontally for ventilation.
Air flow: The 3-lite slider allows air to circulate from both sides and is great for large rooms; the two sliding sashes on either side offer full control of your ventilation needs.
Customization: Several hardware and trim color options are available through certain product lines.