Manitowoc; �pricing maintenance-free & low-maintenance residential replacement Double-Hung Windows. Energy-efficient "Energy Star" easy-tilt & tilt in "easy to clean" from inside.� and sliders, & sliding glass doors, crankout & casement, bow & Bay windows, picture windows. Composite windows. Wood / woodgrain & custom color optional. Double & triple Low E argon & Krypton gas. Installed. Transferable 50-year Warranty.