It's not unusual to see temperatures drop well below freezing for long periods of time.

That's why thermally broken windows were specified in the design of The Siena, a high rise building on Manhattan's East 76th Street. The design architect wanted a window that would keep the heat inside and the cold outside. That's why windows manufactured by EFCO Corporation utilizing Ensinger Inc.'s INSULBAR® were chosen.

INSULBAR® minimizes heat loss through aluminum frames by separating the inside and outside aluminum extrusions. Because it is made from glass-fiber-reinforced nylon, INSULBAR® creates a more efficient and reliable thermal separation. It also provides economical two-color design versatility. The Siena was constructed with a window system that is grey on the exterior and bone white on the interior.

INSULBAR® provides unexcelled design versatility, thermal efficiency and improved structural integrity for manufacturers and users of aluminum windows, doors and curtain walls.