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| Latest News |
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| Glossaries |
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Air Chambers - Small honeycomb spaces within the sash and frame which help to insulate and strengthen the window |
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| Condensation |
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Condensation on windows occurs when the surface temperature of the glass (glazing), sash or frame is lower than that of the humid air around it. The moisture vapour in the air changes into liquid water on contact with these cold surfaces. |
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| Energy Info |
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| ENERGY SAVINGS WHAT TO DO? Look for the Energy Star |
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Low solar gain Low-E glazings are ideal forThe Department of Energy (DOE) and the Environmental Protection Agency (EPA) have developed an ENERGY STAR (www.energystar.gov)
designation for products meeting certain energy performance criteria. Since performance of windows and skylights vary by climate, product recommendations are given for the four ENERGY STAR climate zones. |
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| Look for Efficient Window Properties on the NFRC Label |
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The National Fedestration Rating Council NFRC (www.nfrc.org) has developed a window rating system based on whole window product
performance. The NFRC label provides the only reliable way to determine the energy efficient
properties and to compare products. The NFRC label appears on all fenestration products which are part of the ENERGY STAR program. |
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| Compare Annual Energy Costs for a Typical House |
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Computer simulations for a typical 2000 square-foot house are used to compare the annual energy performance of different window types. |
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| Customize Energy Use Calculations for a Specific House |
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A computer simulation program, such as ( windows.lbl.gov ), lets you compare window options by customizing calculations by adding heating and cooling costs for your climate, house design options, and utility rates. |
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