A Simplified Measurement Method of Solar-Optical Properties of Multi-Pane Glazing Units

Energy-efficient windows with double- or triple-pane glazing units are currently widely utilized in building applications. The solar-optical properties of glazing units can greatly affect their energy and daylighting performance. However, it is generally difficult to measure the solar-optical properties of glazings using the current ISO standards, especially for multi-pane units. This paper presents a simplified test method suitable for multi-pane glazing. Three sets of double-pane Low-Emissivity (LOW-E) glazing units were tested under ISO standard and proposed methods. Good agreement between the two testing methods was obtained. However, the simplified method required much less experimental time and labor.