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Home | Technologies | Windows | Electrochromic Windows
Lightened state of
an electrochromic window
Darkened state of
an electrochromic window
Source: www.nrel.gov

Electrochromic Windows

Electrochromic windows offer the potential for automated control of daylight and solar heat gain in buildings and vehicles. These windows can be lightened or darkened electronically, which can be triggered by a switch or a photovoltaic cell that senses light levels. This capability allows for the automatic control of the amount of light and heat that passes through the windows, thereby presenting an opportunity for the windows to be used as energy-saving devices. The challenges are achieving low costs, high durability, thermal stability, switching reliability, and practical sizes. The National Renewable Energy Laboratory (NREL) is conducting durability testing on electrochromic windows to understand their performance and degradation, as wells as developing the durability standards for the windows.

Several companies are now producing electrochromic window prototypes, including Schott Donnelly, SAGE Electrochromics, Eclipse Energy Systems and Gentex Corporation. SAGE has developed a product that has passed DOE standards for testing and is partnering with Honeywell to provide switching capability. Eclipse Energy Systems is working on flexible plastic electrochromic. Gentex manufactures electrochromic automobile mirrors and is working with PPG Industries to make electrochromic window systems for airplanes.

 

 

Contacts

National Renewable Energy Laboratory
1617 Cole Blvd.
Golden, CO 80401-3393
(303) 275-3000
Web: www.nrel.gov

Schott Donnelly LLC
4545 East Fort Lowell Road
Tucson, AZ 85712-1108
Phone: 520-321-7680 ext. 37
Fax: (520) 522-5635
Email: info@schottdonnelly.com

Mike Myser
SAGE Electrochromics
2150 Airport Drive
Faribault, MN 55021
Phone: 507-333-0078
Fax: 507-333-0145
Email: info@sage-ec.com

Jay (Rip) Wolfington
Eclipse Energy Systems, Inc.
2345 Anvil Street North
St. Petersburg, FL 33710-3905
Phone: 727-344-7300
Fax: 727-346-0600
Email: rip@insytecorp.com

Connie Hamblin
Gentex Corporation
600 North Centennial St.
Zeeland, MI 49464
Phone: 616-772-1800
Fax: 616-772-7348
Email: ir@gentex.com


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