Window Energy Efficiency Ratings

The scheme is similar to those seen on household appliances white goods and light bulbs.

Window energy efficiency ratings.

The national fenestration rating council is committed to advancing continuous improvement of windows doors and skylights contributing to making buildings more comfortable and energy efficient. Savings and costs vary based on the material and its construction process. The rating system is based on a scale of e to a with a windows being the most energy efficient. Energy star qualified windows doors and skylights.

Nfrc u factor ratings however represent the entire window performance including frame and spacer material. What makes it energy star. 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. The white national fenestration rating council label.

Then review ratings on the energy performance label from the national fenestration rating council nfrc to find the most efficient windows for your needs. Window energy ratings the window energy rating wer tells you how energy efficient your windows are. The lower the u factor the more energy efficient the window door or skylight. With the current emphasis on energy efficient windows the national fenestration rating council has designed an energy performance label to guide contractors and homeowners in their search for the perfect window.

The energy star label which means the appliance has met strict energy efficiency criteria set by the u s. There are two main components to consider with an energy efficient window. Are manufactured by an energy star partner. Low emissivity low e glass is a glass coating that improves the energy efficiency of your windows and patio doors.

Since the climates in different parts of the united states vary widely checking the label before ordering the window can make a big. In the summer it reflects heat away from your home keeping it cooler. Energy star most efficient 2020 fixed or picture windows. The energy star most efficient 2020 designation recognizes the most efficient products among those that qualify for the energy star program.

Government in addition to the nfrc ratings. Nonprofit nfrc is the industry recognized certifying body for windows and doors. Nfrc ratings are included on all energy star certified windows and provide a reliable way to determine a window s energy properties and compare products. For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.

It s usually expressed in units of btu hr ft2 of. In the winter low e glass reflects heat back into the room keeping it warmer.