Some of the most energy-efficient windows available are the Ply Gem R-5, Integrity Windows Ultrex Fiberglass Slider, Andersen EcoExcel 400 Series, Milgard Essence Series and Jeld-Wen Custom Wood Double-Hung. Each of the models feature the latest in green technology that reduce draftiness and lower energy bills.
Ply Gem R-5 windows are highly-regarded for their ability to insulate a house from outside weather and are a great choice for new home construction due to their standard of efficiency. These windows have an R-value of five, which means that they can significantly reduce heat loss and can save consumers more than 30 percent on energy bills, making them great for cold and mixed climates.
The Andersen EcoExcel 400 Series is perfect for those looking to meet the tax credit performance criteria. The windows come in a wide variety of styles and custom or standard shapes. Compared to standard dual-pane glass, the Andersen EcoExcel 400 Series windows are 70 percent more energy-efficient in the summer and 45 percent more energy-efficient in the winter.
Jeld-Wen Custom Wood Double-Hung windows feature insulating argon gas to keep energy costs down by helping keep homes warmer in the winter and cooler in the summer. These windows also utilize state-of-the-art technology that deflects direct sunlight to keep interior furnishings from fading and prevents condensation from causing mold and other problems.