In addition: The Sheffield Double Hung also has dual ventilator locks, full balance covers, a constant force balance system, tilt-in top and bottom sashes, and fiberglass screens.
The Alside Sheffield Double Hung also has great glass performance, as seen in the table above. Depending on the glass package you choose, you can achieve a U-Factor as low as 0.23. The most popular glass package is the ClimaTech glass package. This provides an insulated glass unit with multi-layered Low-E Glass and the Intercept Warm Edge Spacer System and argon gas. This glass package is up to 40% more energy efficient than most other low-E glass systems.
The Alside Sheffield is available in the Framework’s Color Collection for interior colors including White, Beige, Architectural Bronze, Hudson Khaki, Desert Clay, English Red, Forest Green, American Terra and Castle Grey.