Window Energy Efficiency Ratings

For windows skylights and glass doors a u factor may refer to just the glass or glazing alone.

Window energy efficiency ratings. The energy star most efficient 2020 designation recognizes the most efficient products among those that qualify for the energy star program. Savings and costs vary based on the material and its construction process. Are manufactured by an energy star partner. Energy star qualified windows doors and skylights.

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. These vertical slider windows represent the leading edge in energy efficient products this year. In the summer it reflects heat away from your home keeping it cooler. 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. The rating system is based on a scale of e to a with a windows being the most energy efficient. There are two main components to consider with an energy efficient window. Frame materials the material used to build a window frame is critical for maximizing energy efficiency wood vinyl composite fibrex material and fiberglass are some of the most common types.

It s usually expressed in units of btu hr ft2 of. 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. The scheme is similar to those seen on household appliances white goods and light bulbs. In the winter low e glass reflects heat back into the room keeping it warmer.

The energy star label which means the appliance has met strict energy efficiency criteria set by the u s. The lower the u factor the more energy efficient the window door or skylight. Low emissivity low e glass is a glass coating that improves the energy efficiency of your windows and patio doors. Government in addition to the nfrc ratings.

The white national fenestration rating council label. Since the climates in different parts of the united states vary widely checking the label before ordering the window can make a big. 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.

Nfrc u factor ratings however represent the entire window performance including frame and spacer material. Energy star most efficient 2020 fixed or picture windows.