The insulated glass is made with the highest quality float glass used in the window industry. Grids placed in between the pieces of glass are sometimes not perfectly lined up, either vertically or horizontally. Air can enter around and through the best window. Do not expect to have zero air infiltration on any vertically or horizontally operating window. Smart Windows are designed to allow the minimum amount of air infiltration consistent with the ease of operation of your window and consistent with industry standards for allowable air infiltration.
Water can enter into the sill track of several different styles of windows.
These windows are designed to capture this water before it enters your home and drain it outside. The presence of water in the sill of the window does not indicate a problem. Condensation is a problem associated with high humidity levels in the home. New Smart Windows with their warmer surfaces may help reduce condensation, but to eliminate the problem, the moisture level in the home must be reduced. Smart Window has several publications that explain how you can reduce the humidity levels in your home.