If you have been searching for a sliding window to replace the old drafty ones the Okna 400 double pane Deluxe is a winner. Superior performance with long lasting durability. Okna from Wonder Windows is not only a great value but are every durable.
- 10% Better than Energy Star® minimum
- 3000% Better than Air Infiltration protection than Industry Standards!
- Dual pane Deluxe
- Heat Seal warm edge system lowers condensation
- High quality all custom window
- Schedule a free quote today
| Energy Star | Comparison To | ||||||
| Glazing Option | U-Value | SHGC | VT | CR | Minimum* | Energy Star Minimum | |
| Dual Glazed | |||||||
| Deluxe | 0.27 | 0.29 | 0.53 | 62 | 0.30 | 10% Better | |
| Industry | Comparison To | ||||||
| Our Windows | Minimum | Industry Minimum | |||||
| AAMA Rating | R 35 | R 15 | |||||
| Air Infiltration cfm/ft2 | 0.01 | 0.3 | 3000% | Better | |||
| Water Penetration mph | 59 | 33 | 79% | Better | |||
| Structural Integrity mph | 143 | 94 | 52% | Better | |||
