competition success magazine * Consider how theyre made. Choose doors with energy-efficient cores, sills and frames that provide a barrier to energy exchange. Dual-pane, Low-E glass helps ensure that they will be weathertight and energy efficient. competition success review For example, studies show that over time, steel doors made with polystyrene maintain energy ratings better than doors made with polyurethane competition success . * Understand the standards. Efficiency ratings are based on U-factor, which is the amount of heat flow through a product. The lower the U-factor, the more efficient the product. csr magazine |Efficiency also is measured by Solar Heat Gain Coefficient (SHGC), which indicates the ability to block heat generated by sunlight. csr subscription The lower the SHGC, the better. Finally, experts evaluate Visible Light Transmission, which is the percentage of sunlight that is able to penetrate a window or door. competitive review Higher percentages mean more light will enter through the glass. * Focus on efficiency, not bells and whistles. csr magazine free download pdf Manufacturers achieve efficiency in different ways. No matter what technology is employed, one of the easiest ways to identify the most energy-efficient products is to simply look for the Energy Star label www competitionreview in.
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