The EcoShield Window's 4000 line unites elegance and performance in a single, highly-efficient system. Engineered for strength and durability, with high end features typically found in the most expensive premium lines, the 4000 delivers superior value.
Click here for DOE R5 Glazing information
*Based on the Department of Energy R5 Building Technologies rating for high performance windows.
Glazing | U-Value | SHGC | VLT |
---|---|---|---|
DOE - R5 - Triple | 0.20 | 0.20 | 0.36 |
Low E w/ Argon | 0.28 | 0.26 | 0.48 |
High Perf. Low E | 0.31 | 0.26 | 0.48 |
Clear | 0.44 | 0.57 | 0.59 |
Not sure what the difference is between a double hung window and a single hung window? Check our frequently asked questions page for answers to common window questions.