UPVC Double Sliding Windows have three frames – left and right sliding sashes that move horizontally in front of the fixed middle pane. The unit has a standard UPVC frame, window latch, snap on insect screen and a single, glazed, grey anti-sun glass. This high-tech and contemporary designed frame has multiple chambers within the frame that creates a thermal barrier to reduces air loss and heat transfer. It is extremely versatile and can be used in many areas of residential and commercial properties.