Low-E
Coating and Argon Gas Filling give a double-glazed unit the R-Value of
a triple-glazed unit.
Low-E coating forms a
barrier to long-wavelength energy only. The sun’s rays are short-
wavelength radiation and easily pass through the window while the
harmful U-V rays are blocked by up to 55%. Much of this solar energy
is absorbed into the structure and furnishings, but the rest is
re-radiated inside the house as long-wavelength energy. Your heating
system also makes long-wavelength energy.
Ordinary
windows absorb most of this long-wavelength energy and re-radiate it
to the outdoors. Low-E coating significantly reduces that heat loss.
The smaller amount of re-radiated heat that does make it out through
the coated glass is then impeded by the Argon Gas inside the unit to
help keep your windows warmer.
Please note that
Low-E Coating is not available on some decorative light entrances. The
Argon Gas component of Low-E Coating is also available in products
with Vintage Series built-in grilles. |