%0 Conference Paper
%A Stephen E Selkowitz
%A Michael D Rubin
%A Richard Creswick
%B 4th National Passive Solar Conference
%D 1979
%G eng
%L LBL-9654
%P 383-386
%T Average Transmittance Factors for Multiple Glazed Window Systems
%1 <p>Windows and Daylighting Group</p>
%2 LBL-9654
%X <p>Multiple glazing is the most common static method of improving the insulating properties of windows. For simplified calculations of solar heat gain a single value for transmittance is chosen, usually the normal transmittance. Whenever such a method is applied, the normal transmittance should be replaced by an averaged value which takes into account the daily and seasonal variations of weather and the angle of incidence.</p>