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Improved comfort of energy efficient replacement
windows
The following information is an example of energy and cost
savings for a cold climate on the East coast and a warmer climate of a
desert area in the Southwest United States.
High performance windows with
new glazing technologies reduce energy costs and make
a home feel more comfortable.
Winter Thermal Comfort:
Older non-energy efficient windows feel cold to the touch because your
body radiates heat, making the window feel colder. Cold glass can make a
room uncomfortable by creating cold drafts. Cold windows actually cool
the warm air near the window. When this cool air falls to the ground, it
is replaced with warmer air, which in turn cools and falls to the
ground, this process continues creating drafts. High performance windows
that have lower U-factors may increase the interior window temperature
in winter, making your home more comfortable. Better energy efficient
windows and installation with weather-stripping designed to seal tightly
will reduce the amount cold air entering your home, and heat escaping.
Summer Thermal Comfort:
During the summer, direct sunlight strikes windows and interior surfaces
and creates discomfort and overheating. Windows that have low solar heat
gains reduce the amount of solar radiation entering your home through
the windows. Windows with Low solar heat gain low-E glass reduce heat
gain at the same time permitting ample light into
the room.
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