The dual pane Deluxe Insul-Tec slider has the energy saving performance you are looking for if you live in the Northeast where temperatures run in the teens and below month after month. Invest in the best window you can afford and know you'll always get the best from Wonder Windows Buffalo.
  • 13% 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 gage 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              
Deluxe 0.26 0.30 0.54 62 0.30 13% 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