A two-lite slider, also referred to as a two section slider, has two equally sized sashes. Each sash operates to allow for ventilation from either side of the unit.
A three-lite slider, also referred to as a three section slider, has a fixed center sash with an operative sash on both sides. The fixed center sash may be twice the width of the two operative sashes in a 1/4 – 1/2 – 1/4 configuration. Alternatively, all three sashes can have the same width in a 1/3 – 1/3 – 1/3 configuration.