@conference {11745, title = {Development of Trade-Off Equations for EnergyStar Windows}, booktitle = {SimBuild 2004}, year = {2004}, month = {08/2004}, address = {Boulder, CO}, abstract = {

The authors explore the feasibility of adding a performance option to DOE{\textquoteright}s EnergyStar{\textcopyright} Windows program whereby windows of differing U-factors and SHGCs can qualify so long as they have equivalent annual energy performance. An iterative simulation procedure is used to calculate trade-off equations giving the change in SHGC needed to compensate for a change in U-factor. Of the four EnergyStar{\textcopyright} Window climate zones, trade-off equations are possible only in the Northern and Southern zones. In the North/Central and South/Central zones, equations are not possible either because of large intrazone climate variations or the current SHGC requirements are already near optimum.

}, author = {Yu Joe Huang and Robin Mitchell and Stephen E. Selkowitz and Dariush K. Arasteh and Robert D. Clear} }