joan85032@yahoo.com wrote;
> Get Low E in the window. it costs maybe 15.00 and it lets
> Get Low E in the window. it costs maybe 15.00 and it lets
> the winter solar gain, and blocks the bad heat in the summer
> because of the angle of the sun.
Hi Joan;
While that is very sound advice for most windows, Joyce
had specified South facing windows. For South facing windows,
Low-E glass will block more heating season Solar gain, than the
heat loss it will save. The net result is that standard double glazing,
(especially with about a 9/16" to 3/4" gap, and argon fill) will be
more energy efficient than using Low-E glass, for South facing
windows. As you astutely pointed out, standard glass will also
allow more Summer heat gain, so if there is a lot of window area,
and no shading or other heat control solutions, and especially in
a very sunny and warm climate like your Arizona, then it may still
be advantageous to use Low-E, even though it is not seasonally
(heating season) as energy efficient as standard glass, for South
facing windows.
-Laren Corie-
Designer of Passive Solar and
Energy Efficient Homes Since 1975
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Posted by: Laren <sylvanabode@gmail.com>
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