Determine the price Because of their material options, shutters will come in a wide range of prices, with many suppliers calculating the price on the square foot. Prices ar fireplace inserts e calculated based on the exact window size, shutter, style, finish, and number of panels involved. Deciding on the unit Shutter units can use a number of different pane pressure cookers l configurations within a window. The number of panels across the shutter is determined by the shutter style, traditional or plantation, and the width of the window.