LEARN MORE AT
energystar.gov
ENERGY STAR®, a U.S. Environmental Protection Agency
program, helps us all save money and protect our environment
through energy efficient products and practices. For more
information, visit www.energystar.gov.
ENERGY STAR Qualified Windows
Protect the Home and Increase Comfort
Windows provide natural daylight and views, but homeowners often use drapes or
blinds to cover them because of comfort concerns. ENERGY STAR qualified windows
and skylights allow owners to enjoy the light and views while saving money on utility
bills and protecting valuable furnishings and finishes from sun damage. Independently
tested for superior energy performance, ENERGY STAR qualified windows and
skylights are also better for the environment because lowering energy use helps
reduce the emissions of greenhouse gases and air pollutants at the source.
BENEFITS OF ENERGY STAR QUALIFIED WINDOWS AND SKYLIGHTS
• Energy Savings. ENERGY STAR qualified windows and skylights feature advanced
technologies such as invisible glass coatings, vacuum-sealed spaces filled with inert gas
between the panes, improved framing materials, better weather stripping, and warm edge
spacers, all of which reduce undesirable heat gain
and loss.
Improved Comfort. Compared to less efficient
windows, ENERGY STAR qualified windows help
keep homes warmer in the winter and cooler in
the summer. This is because they can block
70 percent or more of the solar heat gain in the
summer and reflect radiant heat indoors during
winter.
Protection of Your Home's Interior. Photographs,
furniture, flooring, and window treatments can
fade or discolor after repeated exposure to direct
sunlight. An ENERGY STAR qualified window
with special (Low-E) coatings can reduce fading.
These coatings can reduce fading by up to 75 percent
Multiple panes
Low-E coating
Gas fill
Warm edge spacers
Improved
frame materials
• Reduced Condensation. If an inefficient window or window frame gets too cold, water can
condense (or even freeze) on the interior surface and then pool on the sill. Over time,
chronic condensation can damage window sills, cause paint to crack, and encourage the
growth of mold. Advanced frames, glass coatings, spacers, and other technologies enable
ENERGY STAR qualified windows to keep the inner surface of the glass and frame warmer,
reducing the potential for condensation and ensuring a clearer view on winter mornings.

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LOOK FOR THE ENERGY STAR
To find energy-efficient windows and skylights,
simply look for the ENERGY STAR. The ENERGY
STAR guidelines for windows and skylights are
tailored to four climate zones. For example,
windows in the North are optimized to reduce
heat loss in the winter, while windows in the
South are optimized to reduce heat gain during
the summer. This explains why windows that are
energy efficient in Florida will not necessarily be
energy efficient in Michigan.
INDEPENDENT TESTING FOR ENERGY PERFORMANCE
The energy performance of all ENERGY STAR qualified windows and skylights is independently
tested and certified according to procedures established by the National Fenestration Rating
Council (NFRC). NFRC is a third party, non-profit organization that sponsors certified rating and
labeling programs to help consumers compare the energy and performance features of windows
and skylights.
A BETTER FUTURE
ENERGY STAR is a voluntary partnership between the government and more than 9,000
organizations, including more than 3,500 of the nation's home builders. Together with home
buyers and their families, we are working to achieve a common goal —protecting the
environment for future generations by changing to more energy-efficient practices and
products today.
ENERGY STAR is the government-backed symbol for energy efficiency. It identifies new
homes, buildings, and more than 50 types of products that are energy efficient and offer the
features, quality, and performance that today's consumers expect. Products that can earn the
ENERGY STAR include windows, heating and cooling equipment, lighting, and appliances. To
learn more about ENERGY STAR, visit www.energystar.gov.
ENERGY STAR* Qualified
in Highlighted Regions



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Sample ENERGY STAR Label for Products
Qualified in All Climate Zones

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