Physical testing of Fenestration products is still one of the most reliable tools for determining their thermal performance. Before the wider availability of user friendly computer programs for simulating heat transfer and solar optical properties of windows, physical testing was the primary means of determining indices of performance, such as U-factors, Solar Heat Gain Coefficient, Condensation Resistance, etc. Even today, with the wide availability of accurate computer programs, it is necessary to validate computer-modeling results against physical testing as a means of reality checking. This paper will primarily talk about U-factor and Condensation Resistance capable testing apparatus, or so called "Hot Boxes". You can download the article in full from: http:www// ceere.org/beep/docs/FY2000/Del-17_Trends-in-Testing_DCurcija_Baltics.pdf
