The 800 Enviro-Star Double hung TRIPLE pane with our Energy Saver Package is simply just a great top-of-the-line replacement window. When considering replacement windows for your home consider 3 things. Performance: that's all about how energy efficient a window is and the quality. The Company: how long have they been in business, what references can they provide, reviews, and guarantees. Price: We know it is hard to compare but Wonder Windows guarantees to beat any equally rated Energy Star 2015 Most Efficient Window quote or we will give you your windows for Free.

  • 30% Better than Energy Star┬« minimum
  • 3000% better Air Infiltration protection compared to Industry Standards
  • Triple Pane Glass
  • Energy Saver Package 
  • Magnetic frame seals to the window to greatly reduce drafts
  • Maintenance free design and construction for longer durability
  • 3 1/4" Depth Welded Mainframe 
  • To lower condensation with  Heatseal┬« warm edge spacer system
  • Double weather-stripping and numerous hardware options for any decor.
  • Includes installed fiberglass mesh half screen with Optional locks
  • Many colors to choose from as well as custom colors
        Energy Star         Comparison To
Glazing Option U-Value SHGC VT CR Minimum*              Energy Star Minimum
Triple Glazed              
With ESP 0.22 0.25 0.42 69 0.30   27% Better


      Industry Comparison To  
  Our Windows Minimum Industry Minimum  
AAMA Rating R 60   R 15      
Air Infiltration cfm/ft2 0.01     0.3          3000% Better
Water Penetration mph 59    33             79% Better  
Structural Integrity mph 187     94            99% Better