Energy Efficiency - Learn more

• SOLID PURE UNPLASTICIZED VIRGIN VINYL CONSTRUCTION -The plastic free construction prevents warping, aging and precludes the window from becoming brittle or discoloring
• MULTI-CHAMBERED CONSTRUCTION - Improves structural strength, reduce noise and sound, and improve and insulation of the entire window
• POLYURETHANE FOAM FILLED CHAMBERS - Improves R-Value and insulating properties over other replacement windows creating a more energy efficient window
• DOUBLE PANE 3/4" INSULATED GLASS with ARGON GAS AND LOW-E COATING - Enhances strength and provides optimal energy efficient insulation well above most manufacturers' 'standard' window glass.
• DEEP SEATED INTERLOCK - Reduces air infiltration potential, enhancing the energy efficiency of your Feldco replacement window
• DUAL-PILE FINSEAL WEATHER STRIPPING - Reduces any annoying drafts from high winds that can penetrate your replacement windows. Stronger design to maintain seal; won't crush down.
• DURALITE WARM EDGE TECHNOLOGY - creates long lasting energy-efficient performance by providing protection to the window spacer and seal, which prevents energy loss and internal condensation
• INSULATING FOAM COMPRESSION WRAP - Assures leak-free installation and more energy efficiency through the efficient spread of insulation versus old-fashioned 'tucking' of frame insulation through small gaps during the window installation

Functionality & Durability - Learn more

• MAGNETIC BOTTOM SASH SEAL - Magnetically seals the lower sash to the window frame, increasing comfort by eliminating air infiltration, working much like the design of a refrigerator door.
• MITERED WELDED, DUAL-GLAZED SASHES AND FRAMES - creates greater weld coverage for enhanced durability and more beautiful finish. They cannot come apart, unlike window frames that are screwed or fastened together.
• CONSTANT FORCE BALANCE SYSTEM - Ensures smooth up and down operation of double-hung windows and allows for easier opening/closing of the window at 4-5 lbs of pressure versus other double-hung windows at 9-10 lbs.
• SOLID PURE UNPLASTICIZED VIRGIN VINYL CONSTRUCTION - includes Titanium Dioxide which serves as a sun block. Plastic free composite precludes the window from becoming brittle or turning yellow
• FULL LENGTH INTERLOCKING MEETING RAIL - further reduces potential for drafts and energy loss, and also provides additional security and strength.
• EXTRUDED SCREEN FRAME WITH MITERED CORNERS - increases durability versus standard rolled-thin metal tube frames

Safety and Security - Learn more

• DEEP SEATED INTERLOCK - Increases security and reduces air infiltration in replacement windows by creating a deeper, tighter sash and frame design
• LOCKING SCREENS - Stops children from easily operating screens in double-hung windows, and discourages intruders with another locked barrier
• LOW PROFILE SASH TILT LATCHES WITH CHILDPROOF SAFETY LOCKS - Prevents injury from inadvertently tilting in sash, especially by small children
• STAGGERED VENTILATION LATCHES - Discourages intruders from raising the window, even when the window sash is open for ventilation. And it protects your children by preventing them from opening the window further from the inside.
• FIBERGLASS REINFORCED LOCKING SYSTEM - Enhanced strength locking system protects your family and belongings by discouraging easy break-ins
• DOUBLE WINDOW LOCKS - Feldco Sophia Double Hung windows come standard with two main locks on all widths 24" and wider
• LIMITED LIFETIME NON-PRORATED TRANSFERABLE WARRANTY - Protects your double-hung windows investment for years to come, and through to the buyer of your home if you sell in the future.

Beauty and Design - Learn more

• BEVELED EXTERIOR PROFILE - Provides a clean, modern appearance for your new replacement windows
• MITERED WELDED, DUAL-GLAZED SASHES AND FRAMES - creates greater weld coverage for enhanced durability and more beautiful finish
• MARINE FLOAT GLASS - Creates improved optical transparency in replacement windows through a nonporous glass surface that requires less frequent and easier cleaning. More optically efficient for viewing than standard rolled window glass
• SOLID VIRGIN VINYL CONSTRUCTION - Plastic free composite precludes your new replacement window from becoming brittle or discoloring
• EASY TILT IN SASHES - both upper and lower sashes tilt in for easy and convenient cleaning -from inside your home