Choose the ESP = Energy Saver Package for in dual pane glass for the enegry saving performace you need. The Insul-Tec 500 will deliver not only a beautiful look but stand up to the test of time. Okna windows are know as a great value when considering replacement windows. Call us today and we'll help you make an intellegent decision.
- 10% Better than Energy Star® minimum
- 333% Better Air Infiltration protection than Industry Standards.
- 3¾" Depth Welded Mainframe with superior strength long lasting performance.
- The Heatseal® warm edge spacer system provides excellent thermal efficiency
- Full integral interlock with double weather-stripping.
- Optional Auto-Locking system
- Heavy gauge fully extruded handles
- Factory installed Fiberglass mesh half screens come standard on all windows
- Great for Replacement and New Construction applications
- Available in 2-lite and 3-lite choices
- Available grids between glass in Common Grid Patterns
| Energy Star | Comparison To | ||||||
| Glazing Option | U-Value | SHGC | VT | CR | Minimum* | Energy Star Minimum | |
| Dual Glazed | |||||||
| With ESP | 0.27 | 0.30 | 0.54 | 62 | 0.30 | 10% Better | |
| Industry | Comparison To | ||||||
| OKNA Windows | Minimum | Industry Minimum | |||||
| AAMA Rating | R40 | R15 | |||||
| Air Infiltration cfm/ft2 | 0.09 | 0.3 | 333% | Better | |||
| Water Penetration mph | 59 | 33 | 79% | Better | |||
| Structural Integrity mph | 153 | 94 | 63% | Better | |||
