Window Energy Ratings Explained

Solar heat gain coefficient measures how well a product can resist unwanted direct or indirect solar radiation.

Window energy ratings explained.

Each rating is split into two values. The energy star label which means the appliance has met strict energy efficiency criteria set by the u s. 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. 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. 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 white national fenestration rating council label.

No style of window is more energy efficient than the other it s the manufacturing process and how well the window overall from the frame to the glass performs this is what s important for energy efficiency and window energy rating. The window s insulating value is indicated by the r value which is the inverse of the u value. The windows you select for your home can help make a difference to the warmth and security of your living areas. When lower ratings mean better windows.

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. Energy star qualified windows doors and skylights. Though energy star does not require any. Are manufactured by an energy star partner.

This radiation can cause your home to heat regardless of outside temperature which. U factor ratings for windows generally fall between 0 20 and 1 20. 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 nfrc label provides a reliable way to determine a window s energy properties and to compare products.

The scheme is similar to those seen on household appliances white goods and light bulbs. Window energy ratings the window energy rating wer tells you how energy efficient your windows are. Find out how they can help you select the right windows for your home. Window energy ratings window energy ratings let you compare the energy efficiency of different window products.

Nonprofit nfrc is the industry recognized certifying body for windows and doors. Solar heat gain and u factor. The higher up the window energy rating wer label you go the more energy efficient the window will be. The rating system is based on a scale of e to a with a windows being the most energy efficient.