01739nas a2200157   4500008004100000050001500041245006000056210005700116260001200173300000700185520124800192100002201440700001801462700002501480856007601505       2004                        eng d  aLBNL-5607500aA First-Generation Prototype Dynamic Residential Window0 aFirstGeneration Prototype Dynamic Residential Window  c10/2004  a113 a<p>We present the concept for a "smart" highly efficient dynamic window that maximizes solar heat gain during the heating season and minimizes solar heat gain during the cooling season in residential buildings. We describe a prototype dynamic window that relies on an internal shade, which deploys automatically in response to solar radiation and temperature. This prototype was built at Lawrence Berkeley National Laboratory from commercially available "off-the-shelf" components. It is a stand-alone, standard-size product, so it can be easily installed in place of standard window products. Our design shows promise for near-term commercialization. Improving thermal performance of this prototype by incorporating commercially available highly efficient glazing technologies could result in the first window that could be suitable for use in zero-energy homes. The units predictable deployment of shading could help capture energy savings that are not possible with manual shading. Installation of dynamically shaded windows in the field will allow researchers to better quantify the energy effects of shades, which could lead to increased efficiency in the sizing of heating, ventilation, and air conditioning equipment for residences.</p>1 aKohler, Christian1 aGoudey, Howdy1 aArasteh, Dariush, K.  uhttps://facades.lbl.gov/publications/first-generation-prototype-dynamic