JANUARY JLC 1999
CHOOSING
Energy-
Efficient
Windows
New high-performance glazings can
cut
heating and cooling costs, but you
have to
choose the right windows for your
climate
CHOOSING
Energy-
Efficient
Windows
COURTESY PELLA
There are more than 90 million
homes and approximately 19
billion square feet of windows
in the U.S. alone. It is estimated
that over half of these still have singlepane
glazing. Most of these homes are
more than 20 years old and, as a result,
the market for insulated glass units
(IGUs) in replacement windows is growing
at breakneck speed. At the same
time, "high performance" options have
multiplied over the last few years.
Choosing the right product can cut
heating costs up to 25% and cooling
costs by as much as 40%. Some