About Energy Star®
Zen Windows is proud to offer our customers vinyl replacement windows and sliding
glass patio doors with the ENERGY STAR® label! All Window and Door
products specified with Peak Performance Dual Pane Glass with Low-E and Argon -
or - Super Peak Performance Triple Pane Glass with Low-E and Krypton - are ENERGY
STAR® qualified in all 50 states. Zen Windows and patio
doors are NFRC rated, certified and labeled for both U-factor (heat loss) and solar
heat gain (heat from sunlight.)
ENERGY STAR® is a government-supported program developed to simplify
purchasing decisions for consumers by assuring products meet or exceed strict energy
efficiency criteria set by the U. S. Department of Energy. For more information,
visit the ENERGY STAR website at
www.energystar.gov
ENERGY STAR® qualified windows and doors:
• Help lower energy bills
• Keep your home warmer in the winter and cooler in the summer, thus allowing you
to be more comfortable all year round
• Reduce condensation
• Protect valuable furnishings from fading
• Save money, save energy, and save the environment
When windows shopping, how can you tell if a window is energy efficient?
The ENERGY STAR® label was created as a joint effort by the U.S.
Department of Energy and the U.S. Environmental Protection Agency. The ENERGY STAR®
Window Program is designed to help consumers identify energy efficient windows and
doors. ENERGY STAR® qualified windows and doors save you energy and
money, increase the comfort of your home, and protect your valuable possessions
from sun damage. They are also better for the environment because lowering your
energy use means less air pollution from power plants.
What makes ENERGY STAR® qualified windows and
doors so efficient?
Some of the technologies that window manufacturers can use to fabricate
ENERGY STAR® qualified windows include:
• Improved framing materials such as vinyl
• Two or more panes of glass with a Low-E coating that blocks UV rays and reduces
solar heat
• Warm edge spacers, such as foam, that keep the panes separated without acting
as a conductor to help fight heat loss and reduce condensation
• Argon or krypton gas fills between the panes provide better insulation. These
gases are odorless, colorless, and non-toxic
Who decides if a window is energy efficient?
The energy performance of all ENERGY STAR® qualified windows,
doors, and skylights must be independently tested and certified according to test
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, doors, and skylights.
NFRC’s programs do not distinguish between "good" and "bad" windows, set minimum
performance standards, or mandate performance levels. This is where ENERGY STAR®
comes in. ENERGY STAR® enables consumers to easily identify NFRC-certified
products with superior energy performance.
Performance Ratings
The NFRC label, which can be found on all ENERGY STAR® qualified
windows, provides performance ratings in a number of categories:
U-Factor measures the rate of heat transfer and tells you how well
the window insulates. The lower the U-Factor, the better the window insulates.
Solar Heat Gain Coefficient (SHGC) measures the fraction of solar
energy admitted and tells you how well the product blocks heat caused by sunlight.
The lower the SHGC, the less solar heat the window transmits.
3-Weeks Installation Promise
