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.

Window energy efficiency ratings.

In the summer it reflects heat away from your home keeping it cooler. Energy star qualified windows doors and skylights. Energy star most efficient 2020 fixed or picture windows. Savings and costs vary based on the material and its construction process.

Since the climates in different parts of the united states vary widely checking the label before ordering the window can make a big. Government in addition to the nfrc ratings. Then review ratings on the energy performance label from the national fenestration rating council nfrc to find the most efficient windows for your needs. The lower the u factor the more energy efficient the window door or skylight.

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. Nfrc u factor ratings however represent the entire window performance including frame and spacer material. Low emissivity low e glass is a glass coating that improves the energy efficiency of your windows and patio doors. Nonprofit nfrc is the industry recognized certifying body for windows and doors.

In the winter low e glass reflects heat back into the room keeping it warmer. These vertical slider windows represent the leading edge in energy efficient products this year. Window energy ratings the window energy rating wer tells you how energy efficient your windows are. It s usually expressed in units of btu hr ft2 of.

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. Though energy star does not require any. The energy star label which means the appliance has met strict energy efficiency criteria set by the u s. The white national fenestration rating council label.

The rating system is based on a scale of e to a with a windows being the most energy efficient. 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. 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. What makes it energy star.

For windows skylights and glass doors a u factor may refer to just the glass or glazing alone. There are two main components to consider with an energy efficient window.