Series 850

Boyd's Series 850 features thermal-break construction and a heavy-commercial design for demanding conditions. These aluminum double hung windows are perfect for schools, hospitals, and other monumental applications. And if your vision calls for it, we'll provide the series in architectural configurations. Excellent for historic double hung window replacement projects, we've designed the Series 850 with high-performing features: a 4" main frame depth, double weather-stripped sash panels, custodial-key-operated tilt mechanisms, and heavy-duty spiral balances. For better performance, the sash panels use wraparound marine glazing with a 1" insulated glass.

Series 850 Specifications