OR-05-4 Symposium on Evaluating and Improving Fenestration Performance OR-05-4-1 Laboratory Infrared Thermography Technique for Window Surface Temperature Measurements A.H. Elmahdy and Frank Devine . 561 OR-05-4-2 Methods for Calculating the Effective Solar-Optical Properties of a Venetian Blind Layer Darryl S. Yahoda and John L. Wright 572 OR-05-4-3 Two-Dimensional Conduction and CFD Simulations of Heat Transfer in Horizontal Window Frame Cavities Arild Gustavsen, Christian Kohler, Dariush Arasteh, and Dragan Curcija 587