Window tinting can reduce the heat entering your home by up to 85% thus lowering the amount of air conditioning needed to cool your home. Window tinting is one of the easiest ways to lower your energy use during the hot summer months. It also blocks 99% of harmful UV rays from entering through the windows which can cut down on fading of interior fabrics and carpeting. Installed cost for residential window tinting is calculated by square feet of glass and runs $6.50 per square foot and up depending on type of tinting selected.