The triple pane Deluxe Okna Enviro-Star 800 Series slider with heavy duty foam filled frame goes to the next level of energy efficiency. This high-end window is a perfect choice for homeowners in the Northeast. Let Wonder Windows show you the difference between our windows and any other manufacturer.
- 33% Better U-Value than Energy Star® minimum
- 600% Better Air Infiltration protection
- Wide selection of hardware options
- Superior craftsmanship
- Full integral interlock with double weather-stripping.
- Full 3¼" Depth Welded Mainframe
- Beveled colonial exterior features
- Available in standard and custom exterior colors
- Maintenance free, for years of long lasting performance.
- Heatseal® warm edge spacer system for excellent thermal efficiency and drastic reduction in 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|
|Our Windows||Minimum||Industry Minimum|
|AAMA Rating||R 50||R 15|
|Air Infiltration cfm/ft2||0.05||0.3||600%||Better|
|Water Penetration mph||62||33||88%||Better|
|Structural Integrity mph||171||94||82%||Better