If you decide to replace your windows, you will have to make several decisions about the type of windows you purchase and the type of replacement you will make.
You may have the option of replacing the windows in their existing frame; discuss this option with your window retailer and installer to find out if it will work for you.
In addition to choosing the window type, you also need to consider design, energy use and labeling, warranties, and proper installation.
First look for the ENERGY STAR label when buying new windows. Then review ratings on the energy performance label from the National Fenestration Rating Council (NFRC) to find the most efficient windows for your needs.
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. Learn about energy performance ratings for windows to understand how to read the labels and energy-use information.
Then use the window selection tools for replacement windows or new construction to compare options based on your climate and home design.
Window Selection Tips
Look for the ENERGY STAR and NFRC labels.
In colder climates, consider selecting gas-filled windows with low-e coatings to reduce heat loss. In warmer climates, select windows with coatings to reduce heat gain.
Choose a low U-factor for better thermal resistance in colder climates; the U-factor is the rate at which a window conducts non-solar heat flow.