Multiple glazed windows: Design charts

Thermal resistance, noise reduction, daylight and solar energy admittance are some of the expected duties of a window. A window manufacturer or a building services engineer employed to select windows for optimum performance does not necessarily need to know the intricate details of the thermal, sound, daylight and solar transmission characteristics of multiple glazed windows. Rather, they require broadly based information on critical design parameters and their influence on window performance. This paper presens charts which enable appropriate design of windows for any given duty and set of constraints.