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<P>There's several things I find critics of direct gain Equatorial facing
windows often overlook. One is movable insulation, I'm really glad to see that
many people on this list have built and use their movable window insulation.
I've been using mine for over 22 years- <A
href="http://www.builditsolar.com/Projects/Conservation/ThermalShades/ReflectexShade.htm">http://www.builditsolar.com/Projects/Conservation/ThermalShades/ReflectexShade.htm</A>.
The easier it is to use, the more it will be used. Another is the way window
technology has increased, greatly improving R-value and heat retention. Yet
another factor critics often overlook is the human factor-the ability to feel
warmer at lower air temperatures when you're surrounded by warm thermal mass,
radiating heat at you. Compare this to fan forced systems blowing a breeze at
you-if that breeze isn't about 85 degrees or more, it's going to feel chilly. My
home gets a solar gain even on bright overcast days. Doug-25 years of
comfortable living in a direct gain passive solar home</P>
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