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Replacement Window Comparison Chart

Not sure which series of our quality replacement windows is best for your home? Use this handy chart to compare our products side-by-side.

Key Features Potomac-hp Fortis Georgetown
Performance Grade R55 R50 R45
Air Infiltration (cfm/ft2) 0.05 0.05 0.09
Fusion-welded Frame yes yes yes
Jamb Depth of Frame 3 1/4" 3 1/4" 2 3/4"
Main Frame Sill sloped sloped sloped
Interior Color white and beige white and beige white
VyWood™ Interior Laminate yes yes  
VyCore™ Foam yes yes  
Sash Configuration dual dual dual
Fusion-welded Sash yes yes yes
Lock and Keeper Composite Reinforcement standard standard  
Integral Locking Sash yes yes yes
Cam Locking System yes yes yes
Tilt-in Sash for Easy Cleaning yes yes yes
Integrated Sash Lock and Tilt System yes    
Dual Vent Latch yes yes yes
Balance System constant force constant force constant force
Glass Strength double-3.0 mm double-3.0 mm single-2.5 mm
High-Performance Low-E glass yes yes yes
High-Performance Triple Silver™ Low-E Glass standard optional  
Insulating Glass Unit (IGU) Thickness 1" 7/8" 3/4"
Duratex™ Warm Edge Spacer System yes yes yes
Energy Saver Plus™ Glass Package yes yes yes
Energy Saver Max™ Glass Package yes yes  
Energy Saver Ultimate™ Glass Package yes yes  
Flat Grids yes yes yes
Contour Grids yes yes yes
DesignerGrid™ yes yes yes
Simulated Divided Lites (SDLs) yes yes  
Screen Frame extruded extruded extruded
Fiberglass Screen Mesh yes yes yes
VyClear™ Screen standard optional  
Mortised Sill Dam Wall yes yes  
Sill/Sash Interlock yes yes  
Magnetic Seal yes