Multiple panes of glass, low-e coatings, and high-quality weatherstripping make high-performance windows energy efficient, which translates to energy savings for you. With reduced air leakage and glass with improved insulation, your home will feel more comfortable than ever. Condensation forms when warm, humid air contacts a cold surface. We usually see condensation on windows when the temperature drops because they tend to be the coldest indoor surfaces.
High-performance windows allow for a comfortable level of humidity in your home without creating condensation. The additional panes of glass and increased airtightness create a buffer from outside noise, making your home more peaceful. Windows fall into two broad categories: fixed and operable. Fixed windows are less expensive and more airtight since there are no moving parts. Operable windows, on the other hand, provide ventilation and are available in sliding, casement, awning, and tilt and turn styles.
These properties can be measured and rated according to the following energy performance characteristics:. The ability of glazing in a window, door, or skylight to transmit sunlight into a home can be measured and rated according to the following energy performance characteristics:. Review the state fact sheets or use the window selection tool for new construction or existing homes from the Efficient Windows Collaborative to determine the desired performance ratings for your climate.
Subscribe to receive updates from Energy Saver, including new blogs, updated content, and seasonal energy saving tips for consumers and homeowners. Energy Performance Testing, Certification, and Labeling. Heat Gain and Loss. Windows, doors, skylights can gain and lose heat through: Direct conduction and convection heat transfer through the glass or multi-layer glazing and framing Thermal radiation into a house and out of a house from room-temperature objects, such as exterior walls and windows, people, equipment, furniture, and interior walls The solar radiation into a house, which is converted to heat when absorbed by building surfaces Air leakage through and around them.
Homepage Header Search box Search. Performance Criteria Windows, doors and skylights protect you from the elements just like a winter coat. Geographically speaking, the Northern Zone covers most of the country and the Southern Zone is the smallest, but the North-Central and South-Central Zones cover some major population centers. The qualification criteria for windows are as follows: In the Northern Zone, there are prescriptive and equivalent energy performance criteria.
The prescriptive criteria require a U-factor of 0. With the equivalent energy performance criteria, products can be considered certified with the following performance: U-factor of 0. All other zones only have prescriptive criteria. In the North-Central Zone, the U-factor requirement is 0.
The South-Central Zone allows U-factors of 0. Windows qualified in the Southern Zone can have U-factors of 0. The qualification criteria for skylights are prescriptive only and are as follows: In the Northern Zone, skylights must have a U-factor of 0. In the North-Central Zone, skylights must have a U-factor of 0. In the South-Central Zone, skylights must have a U-factor of 0. Having an R-value of 5 means that these windows have reduced heat loss from a U-factor of 0.
It's offered in LoE2 tempered glass for extra durability, shatter resistance and a special efficiency glazing.
You can choose from a wide variety of styles and custom or standard shapes from the Series and Series product lines without paying for expensive upgrades. These two energy packages address all three key areas of efficiency — framework, product design and glazing by matching them to the climate of the region you are installing these new windows. This technology also deflects direct sunlight to help reduce the fading of interior furnishings and prevent condensation.
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