With energy-efficient options and a variety of stylish design choices, you have plenty of ways to customize Window World’s 4000 Series replacement windows. Choose to upgrade with our SolarZone™ glass packages to help improve thermal performance and reduce energy costs.

Features

• Welded, heavy-duty vinyl construction provides lasting durability and strength
• Multiple hollow chambers in the mainframe seal air spaces create effective insulation
• High-density foam throughout the mainframe boost structural integrity and thermal performance
• Beveled exterior edge adds style and curb appeal
• Double- and triple-pane insulating glass and our Duralite® warm-edge spacer system seal air space between the panes for improved comfort and energy-efficiency
• Recessed, opposing cam locks provide security without interrupting sight lines
• Heavy-duty weatherstripping and interlocking sashes protect your home from the elements
• Both top and bottom sashes tilt in for easy cleaning
• Push-button vent latches allow for optimum ventilation
• Welded combination sill featuring a deflection leg enhances rigidity and a five-degree slope directs water away from the home and eliminates unsightly weep holes
• Full-length, ergonomic lift rails allow for easy operation
• An easily removable latching half screen featuring Clarity® mesh

Window World’s 6000 Series Double-Hung Windows are expertly designed and engineered for superior energy savings. Built to last, the vinyl frame replicates the look of wood while being virtually maintenance-free. With two operable sashes, this series can easily be cleaned easily from the inside, making it the perfect combination of style and efficiency.

Features

• Includes triple-paned energy-efficient glass package
• Vinyl construction of the frames and sashes which are welded at mitered corners
• Frame profiles feature divided chambers for high thermal performance and added rigidity
• Triple-pane insulating glass unit is ³/₄” – the optimum size for dependable energy efficiency
• Standard SolarZone™ glass enhances energy performance
• Glass edges are positioned ¹/₂” into the sash to help maintain even temperatures
• Sloped window sill design prevents water from pooling while the closed-cell foam barrier seal prevents water from seeping in
• Weatherstripping around each sash reduces draft
• Windows can be held in any open position because of a coil spring balance system
• Lift rails are molded into the sash and will not loosen or break off
• Vent latches allow for ventilation without opening the sash fully

As the most popular type of replacement window, double-hung windows feature a whole host of benefits. For example, they are low maintenance and feature tilt-in sashes for easy cleaning. They offer exceptional ventilation because both sashes are movable. They are highly versatile, so they fit seamlessly within any design scheme—from modern homes to cozy bungalows. What’s more, double-hung windows offer great energy efficiency to keep homes comfortable throughout the seasons.

The difference between a double-hung window and a single-hung window is all in the name: Double-hung windows have “double” the number of movable panes compared with single-hung windows. Single-hung windows have a fixed top sash that doesn’t move and an operable bottom sash that can be pushed upward to allow in fresh air. In a double-hung window, both sashes are operable.

Yes, they are! Our double-hung windows are equipped with many components to enhance their energy efficiency, including warm-edge spacers, double or triple panes of insulated glass, low-E coatings, argon gas fills, reinforced meeting rails, and foam-filled frames. And you can even upgrade your windows to our SolarZone™ TG2 Elite™ insulated glass package to take energy efficiency to the next level. An ENERGY STAR®-certified system, SolarZone can reduce solar heat gain and minimize interior glare in the summertime and provide outstanding thermal performance in the wintertime.