The Series 3000 new construction double-hung window uses the latest window technology to make a strong, energy efficient window. As our premium new construction double-hung window, it is an ideal choice for many applications. Its beautiful brickmold design addes elegance to any home, while its vast selection of designs and sizes enables you to showcase your unique style. Beneath its traditional appearance, this low-maintenance vinyl window is hard at work providing durable, energy efficient performance for comfort and beauty. Energy Star