Okna's Insul-Tec 500 double pane Deluxe double hung window is a winner. You'll love the design features and durability. Remember all Okna windows come with a limited lifetime guarantee. Compared to other high end manufactures you'll fine the 500 series to be one of the very best values.
- 17% Better than Energy Star® minimum
- 1500% Better Air Infiltration protection than industry standards.
- 3¼" Deep welded frame curved colonial exterior a beautiful, strong long lasting performance.
- Heatseal® warm edge spacer drastically reduces the possibility of condensation on the inside of the window.
- Full integral interlock with double weather-stripping.
- Chooses the Auto-Lock feature for security.
- Matching colors on our fully extruded handles.
- Factor installed fiberglass mesh half screens.
- 4 exterior color options
|Energy Star||Comparison To|
|Glazing Option||U-Value||SHGC||VT||CR||Minimum*||Energy Star Minimum|
|Our Windows||Minimum||Industry Minimum|
|Air Infiltration cfm/ft2||0.02||0.3||1500%||Better|
|Water Penetration mph||54||33||64%||Better|
|Structural Integrity mph||171||94||82%||Better|