This ESP version of the Insul-Tec picture window is another great choice ESP = Energy Save Package. Simply a great maintenance free picture window that stands up to the test of time. When considering replaceing any window take the time to compare ratings, installation experience, guarantees, reviews and testimonials. We know you have choices and believe once you take the time to see the options you will be glad you called Wonder Windows.
- 10% Better than Energy Star® minimum
- 3000% Better AI protection
- Full 3¼" Depth Welded Mainframe
- Excellent craftsmanship
- Vinyl windows are strong and durable
- Foam filled frame for greater performance
- Beautiful, and strong for years of long lasting maintenance free performance.
- Heatseal® warm edge spacer system drastically reduces the possibility of condensation on the inside of the window.
- Available in Replacement and New Construction applications.
| Energy Star | Comparison To | ||||||
| Glazing Option | U-Value | SHGC | VT | CR | Minimum* | Energy Star Minimum | |
| Dual Glazed | |||||||
| With ESP | 0.27 | 0.31 | 0.56 | 64 | 0.30 | 10% Better | |
| Industry | Comparison To | ||||||
| OKNA Windows | Minimum | Industry Minimum | |||||
| AAMA Rating | R75 | R15 | |||||
| Air Infiltration cfm/ft2 | <0.01 | 0.3 | 3000% | Better | |||
| Water Penetration mph | 66 | 33 | 100% | Better | |||
| Structural Integrity mph | 210 | 94 | 123% | Better | |||
