Javad Khodaii - Planning Department, Hofmann UPVC Profile, Tabriz, Iran

Design and selection of windows has a significant impact on the building energy loss. The proper windows notonly determine the energy waste, but also has a strong effect on the initial cost, CO۲ emission, and embodied energy. Inthis research the effect of multi glazing window glass and cities average monthly temperature, on the energy waste, initialcost, payback period, CO۲ emission, and embodied energy was investigated. The use of triple glazed window, significantlydecreased the energy waste and related cost. It was observed that in the first installation, the capital payback period in therange of ۰.۷ to ۲.۶ years, therefore in the first installation economically it is strongly recommended to use a double ortriple glazing window.

Multi glazed windows, Energy waste, Embodied energy, Cities average monthly temperature, CO۲ emission