Window Energy Ratings Explained

What makes it energy star.

Window energy ratings explained.

The nfrc label provides a reliable way to determine a window s energy properties and to compare products. The window s insulating value is indicated by the r value which is the inverse of the u value. Solar heat gain coefficient measures how well a product can resist unwanted direct or indirect solar radiation. When lower ratings mean better windows.

The following window ratings can be used to determine the efficiency of various windows and help you sort through the plethora of options available. The rating system is based on a scale of e to a with a windows being the most energy efficient. The windows you select for your home can help make a difference to the warmth and security of your living areas. U value sometimes called window u factor measures the rate of heat transfer it tells you how much heat is lost or gained through.

Window energy ratings window energy ratings let you compare the energy efficiency of different window products. Are independently tested certified and verified by the national fenestration rating council nfrc and have nfrc ratings that meet strict energy efficiency guidelines set by the us environmental protection agency epa. Window energy ratings explained it s important to consider how efficient your windows are if they are working correctly to keep you and your home warm. The national fenestration rating council nfrc operates a voluntary program that tests certifies and labels windows doors and skylights based on their energy performance ratings.

The lower the u value the greater a window s resistance to heat flow and the better its insulating value. The circled value shows you the rating a door has received. This radiation can cause your home to heat regardless of outside temperature which. Up to a huge 25 of the heat within most homes will escape straight out of the window which could end up costing you a small fortune in heating bills.

Solar heat gain and u factor. U factor ratings for windows generally fall between 0 20 and 1 20. The energy star label which means the appliance has met strict energy efficiency criteria set by the u s. The scheme is similar to those seen on household appliances white goods and light bulbs.

Each rating is split into two values. Window energy ratings the window energy rating wer tells you how energy efficient your windows are. The white national fenestration rating council label. Find out how they can help you select the right windows for your home.

Though energy star does not require any. The higher up the window energy rating wer label you go the more energy efficient the window will be. Nonprofit nfrc is the industry recognized certifying body for windows and doors. Are manufactured by an energy star partner.