Energy Star -
The International Energy Star symbol is a simple way for consumers to identify products that are among the most energy-efficient on the market. Only manufacturers and retailers whose products meet the Energy Star criteria can call their product Energy Star. Understanding what the numbers mean:
To find out more about Vinylbilt Test Results, click on this symbol.
Enter Vinylbilt in the box labeled "Brand Name" and hit the search button at the bottom of the page. Energy Star Zone - The Area within North America that the window has been rated for testing.
U Factor - Measures how well a product prevents heat from escaping. The rate of heat loss is indicated in terms of the U factor (U Value) of a window assembly. U factor ratings generally fall between 0.20 and 1.20. The insulating value is indicated by The R - Value which is the inverse of the U - Value.
Solar Heat Gain Co-efficient - (SHGC) measures how well a product blocks heat caused by sunlight. The SHGC is the fraction of incident solar radiation admitted through a window, both directly transmitted and absorbed and subsequently released inward. SHGC is expressed as a number between 0 and 1. The lower a windows SHGC, the less solar heat is transmitted.
Energy Rating - (ER) an overall measure of the window's energy performance, the higher the number the better the performance.
