hese enclosed blinds are a perfect choice for people who value energy savings and quiet. The triple-glazed design with Low-E glass option reduces heat transmission by up to 28 percent and carries a 34 STC (Sound Transmission Coefficient) rating for sound suppression. Beyond the comforts and practicalities of a triple-glazed doorglass lie stylish details. Grilles add a warm aesthetic. The blind slats disappear behind the valance when they are fully raised for a clean, finished look. Blinds tilt, and raise and lower the entire length of the door glass.