The EcoShield 2000 is our most popular vinyl replacement window. The slimline frame and sash design allow for maximum viewing area, while our ST glazing package meets the latest, most rigorous Energy Star standards. It’s one of the most functional, most efficient vinyl double hung windows on the planet.
| Glazing | U-Factor | SHGC | VLT |
|---|---|---|---|
| ST Stimulus | .29 | .29 | .55 |
| Supra | .31 | .29 | .56 |
| HP Low E | .34 | .29 | .55 |
| Clear | .48 | .63 | .65 |
Full test results with grids or without grids
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.