The Okna double hug 400 series Deluxe is an excellent entry level replacement window. As a Buffalo homeowner you appreciate just how cold it can get so an investment in energy saving windows like this one can help lower those utility bills.
- 33% Better than Energy Star® minimum
- Fully welded sash and welded frame
- Excellent energy efficiency
- Heatseal® warm edge for lower condensation
- A durable and energy efficient double hung window.
- The highest performance rating of the 400 series options.
| Glazing Option | U-Value | SHGC | VT | CR | Minimum* | Energy Star Minimum | |
| Triple Glazed | |||||||
| Deluxe | 0.20 | 0.26 | 0.42 | 72 | 0.30 | 33% Better | |
| Industry | Comparison To | ||||||
| Our Windows | Minimum | Industry Minimum | |||||
| AAMA Rating (38 x 63) | R50 | R15 | |||||
| Air Infiltration cfm/ft2 | 0.05 | 0.3 | 600% | Better | |||
| Water Penetration mph | 56 | 33 | 70% | Better | |||
| Structural Integrity mph | 171 | 94 | 82% | Better | |||
