Make the Choice to enjoy the Superior efficiency, comfort
and quality of ENERGY STARŪ Windows, and you can also enjoy
reduced energy bills!
You don't have to wait until resale to realize the financial
benefits of buying Energy Star Windows. These windows offer
savings every month through utility bills that are significantly
lower than those of standard windows. The savings can amount to
hundreds of extra dollars every year. In addition to saving
money on your utility bills, the energy-efficient features of
ENERGY STARŪ Windows are more durable which may reduce or even
eliminate many repair costs.
What Qualifies a Window for the ENERGY STARŪ Label?
The National
Fenestration Rating Council (NFRC) rates the performance of
windows on how well they help to keep your home cool in the
summer, warm in the winter, keep out wind, and resist
condensation. Here's what to look for:
U-factor: Measures how well a product prevents heat from
escaping. U-Factor ratings generally fall between 0.20 and 1.20.
The insulating value is indicated by the R-value which is the
inverse of the U-value. The lower the U-value, the greater a
window's resistance to heat flow and the better its insulating
value.
Solar Heat Gain Coefficient (SHGC): Measures how well a product
blocks heat caused by sunlight. SHGC is expressed as a number
between 0 and 1. The lower a windows' solar heat gain
coefficient, the less solar heat it transmits.
Visible Transmittance (VT): Measures how much light comes
through a product. VT is expressed as a number between 0 and 1.
The lower the VT, the less light is transmitted.
Air Leakage (AL): Measures how much air passes through the
window assembly. The lower the AL, the less air will pass
through the cracks and gaps in the window assembly.
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