The 800 Series Enviro-Star double pane with ESP is a great choice. ESP = the Energy Saver Package with foam filled frame. Your family room, great room or dining room will be a show place for light and the open feeling of large picture windows. Let us show you the difference...quality and low pricing from Wonder Windows Buffalo.

  • 10% Better than Energy Star┬« minimum
  • 3000% Better Air Infiltration protection
  • Wide selection of glass, grids and shapes and sizes
  • Superior craftsmanship
  • Full 3┬╝" 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
  • Lower 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
Dual Glazed              
With ESP 0.27 0.31 0.56 63 0.30 10% Better


      Industry Comparison To  
  Our Windows Minimum Industry Minimum  
AAMA Rating R 75 R 15      
Air Infiltration cfm/ft2 0.01   0.3  3000% Better
Water Penetration mph   66   33  100% Better  
Structural Integrity mph 210   94  123% Better