· Does the window have low-E glass? Regular, uncoated glass releases heat
in winter and retains it in summer. To prevent this, some window
manufacturers use low-Emissivity (low-E) coatings on one pane. Low-E coatings
block the radiation that can account for as much as 60 percent of a window's
heat loss. They also protect indoor furnishings from sun damage.
It makes sense to ask your contractor for recommendations, but a little
homework of your own can help you end up with the most appropriate windows
for your construction or remodeling project.
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