A plastic window including a transparent plastic substrate having first and second sides. Bonded to the first side of the substrate is a plastic film, the film being thinner than the substrate. An electrically conductive grid, including at least one conductive connector location, is encapsulated between the substrate and the film. Extending into the substrate, at least one electrical connector is positioned in electrical contact with the conductive mounting so that an electrical voltage supply can be connected to the conductive mounting and an electrical current can be caused to flow through the conductive grid.